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4a954cfd11
django/docs/ref/contrib/admin/index.txt
Tobias Kunze 4a954cfd11 Fixed #30573 -- Rephrased documentation to avoid words that minimise the involved difficulty. 
This patch does not remove all occurrences of the words in question.
Rather, I went through all of the occurrences of the words listed
below, and judged if they a) suggested the reader had some kind of
knowledge/experience, and b) if they added anything of value (including
tone of voice, etc). I left most of the words alone. I looked at the
following words:

- simply/simple
- easy/easier/easiest
- obvious
- just
- merely
- straightforward
- ridiculous

Thanks to Carlton Gibson for guidance on how to approach this issue, and
to Tim Bell for providing the idea. But the enormous lion's share of
thanks go to Adam Johnson for his patient and helpful review.
2019-09-06 13:27:46 +02:00

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=====================
The Django admin site
=====================
.. module:: django.contrib.admin
:synopsis: Django's admin site.
One of the most powerful parts of Django is the automatic admin interface. It
reads metadata from your models to provide a quick, model-centric interface
where trusted users can manage content on your site. The admin's recommended
use is limited to an organization's internal management tool. It's not intended
for building your entire front end around.
The admin has many hooks for customization, but beware of trying to use those
hooks exclusively. If you need to provide a more process-centric interface
that abstracts away the implementation details of database tables and fields,
then it's probably time to write your own views.
In this document we discuss how to activate, use, and customize Django's admin
interface.
Overview
========
The admin is enabled in the default project template used by
:djadmin:`startproject`.
If you're not using the default project template, here are the requirements:
#. Add ``'django.contrib.admin'`` and its dependencies -
:mod:`django.contrib.auth`, :mod:`django.contrib.contenttypes`,
:mod:`django.contrib.messages`, and :mod:`django.contrib.sessions` - to your
:setting:`INSTALLED_APPS` setting.
#. Configure a :class:`~django.template.backends.django.DjangoTemplates`
backend in your :setting:`TEMPLATES` setting with
``django.contrib.auth.context_processors.auth`` and
``django.contrib.messages.context_processors.messages`` in
the ``'context_processors'`` option of :setting:`OPTIONS
<TEMPLATES-OPTIONS>`.
#. If you've customized the :setting:`MIDDLEWARE` setting,
:class:`django.contrib.auth.middleware.AuthenticationMiddleware` and
:class:`django.contrib.messages.middleware.MessageMiddleware` must be
included.
5. :ref:`Hook the admin's URLs into your URLconf
<hooking-adminsite-to-urlconf>`.
After you've taken these steps, you'll be able to use the admin site by
visiting the URL you hooked it into (``/admin/``, by default).
If you need to create a user to login with, use the :djadmin:`createsuperuser`
command. By default, logging in to the admin requires that the user has the
:attr:`~.User.is_superuser` or :attr:`~.User.is_staff` attribute set to
``True``.
Finally, determine which of your application's models should be editable in the
admin interface. For each of those models, register them with the admin as
described in :class:`ModelAdmin`.
Other topics
------------
.. toctree::
:maxdepth: 1
actions
admindocs
javascript
.. seealso::
For information about serving the static files (images, JavaScript, and
CSS) associated with the admin in production, see :ref:`serving-files`.
Having problems? Try :doc:`/faq/admin`.
``ModelAdmin`` objects
======================
.. class:: ModelAdmin
The ``ModelAdmin`` class is the representation of a model in the admin
interface. Usually, these are stored in a file named ``admin.py`` in your
application. Let's take a look at an example of the ``ModelAdmin``::
from django.contrib import admin
from myproject.myapp.models import Author
class AuthorAdmin(admin.ModelAdmin):
pass
admin.site.register(Author, AuthorAdmin)
.. admonition:: Do you need a ``ModelAdmin`` object at all?
In the preceding example, the ``ModelAdmin`` class doesn't define any
custom values (yet). As a result, the default admin interface will be
provided. If you are happy with the default admin interface, you don't
need to define a ``ModelAdmin`` object at all -- you can register the
model class without providing a ``ModelAdmin`` description. The
preceding example could be simplified to::
from django.contrib import admin
from myproject.myapp.models import Author
admin.site.register(Author)
The ``register`` decorator
--------------------------
.. function:: register(*models, site=django.admin.sites.site)
There is also a decorator for registering your ``ModelAdmin`` classes::
from django.contrib import admin
from .models import Author
@admin.register(Author)
class AuthorAdmin(admin.ModelAdmin):
pass
It's given one or more model classes to register with the ``ModelAdmin``.
If you're using a custom :class:`AdminSite`, pass it using the ``site`` keyword
argument::
from django.contrib import admin
from .models import Author, Editor, Reader
from myproject.admin_site import custom_admin_site
@admin.register(Author, Reader, Editor, site=custom_admin_site)
class PersonAdmin(admin.ModelAdmin):
pass
You can't use this decorator if you have to reference your model admin
class in its ``__init__()`` method, e.g.
``super(PersonAdmin, self).__init__(*args, **kwargs)``. You can use
``super().__init__(*args, **kwargs)``.
Discovery of admin files
------------------------
When you put ``'django.contrib.admin'`` in your :setting:`INSTALLED_APPS`
setting, Django automatically looks for an ``admin`` module in each
application and imports it.
.. class:: apps.AdminConfig
This is the default :class:`~django.apps.AppConfig` class for the admin.
It calls :func:`~django.contrib.admin.autodiscover()` when Django starts.
.. class:: apps.SimpleAdminConfig
This class works like :class:`~django.contrib.admin.apps.AdminConfig`,
except it doesn't call :func:`~django.contrib.admin.autodiscover()`.
.. attribute:: default_site
A dotted import path to the default admin site's class or to a callable
that returns a site instance. Defaults to
``'django.contrib.admin.sites.AdminSite'``. See
:ref:`overriding-default-admin-site` for usage.
.. function:: autodiscover
This function attempts to import an ``admin`` module in each installed
application. Such modules are expected to register models with the admin.
Typically you won't need to call this function directly as
:class:`~django.contrib.admin.apps.AdminConfig` calls it when Django starts.
If you are using a custom ``AdminSite``, it is common to import all of the
``ModelAdmin`` subclasses into your code and register them to the custom
``AdminSite``. In that case, in order to disable auto-discovery, you should
put ``'django.contrib.admin.apps.SimpleAdminConfig'`` instead of
``'django.contrib.admin'`` in your :setting:`INSTALLED_APPS` setting.
``ModelAdmin`` options
----------------------
The ``ModelAdmin`` is very flexible. It has several options for dealing with
customizing the interface. All options are defined on the ``ModelAdmin``
subclass::
from django.contrib import admin
class AuthorAdmin(admin.ModelAdmin):
date_hierarchy = 'pub_date'
.. attribute:: ModelAdmin.actions
A list of actions to make available on the change list page. See
:doc:`/ref/contrib/admin/actions` for details.
.. attribute:: ModelAdmin.actions_on_top
.. attribute:: ModelAdmin.actions_on_bottom
Controls where on the page the actions bar appears. By default, the admin
changelist displays actions at the top of the page (``actions_on_top = True;
actions_on_bottom = False``).
.. attribute:: ModelAdmin.actions_selection_counter
Controls whether a selection counter is displayed next to the action dropdown.
By default, the admin changelist will display it
(``actions_selection_counter = True``).
.. attribute:: ModelAdmin.date_hierarchy
Set ``date_hierarchy`` to the name of a ``DateField`` or ``DateTimeField``
in your model, and the change list page will include a date-based drilldown
navigation by that field.
Example::
date_hierarchy = 'pub_date'
You can also specify a field on a related model using the ``__`` lookup,
for example::
date_hierarchy = 'author__pub_date'
This will intelligently populate itself based on available data,
e.g. if all the dates are in one month, it'll show the day-level
drill-down only.
.. note::
``date_hierarchy`` uses :meth:`QuerySet.datetimes()
<django.db.models.query.QuerySet.datetimes>` internally. Please refer
to its documentation for some caveats when time zone support is
enabled (:setting:`USE_TZ = True <USE_TZ>`).
.. attribute:: ModelAdmin.empty_value_display
This attribute overrides the default display value for record's fields that
are empty (``None``, empty string, etc.). The default value is ``-`` (a
dash). For example::
from django.contrib import admin
class AuthorAdmin(admin.ModelAdmin):
empty_value_display = '-empty-'
You can also override ``empty_value_display`` for all admin pages with
:attr:`AdminSite.empty_value_display`, or for specific fields like this::
from django.contrib import admin
class AuthorAdmin(admin.ModelAdmin):
fields = ('name', 'title', 'view_birth_date')
def view_birth_date(self, obj):
return obj.birth_date
view_birth_date.empty_value_display = '???'
.. attribute:: ModelAdmin.exclude
This attribute, if given, should be a list of field names to exclude from
the form.
For example, let's consider the following model::
from django.db import models
class Author(models.Model):
name = models.CharField(max_length=100)
title = models.CharField(max_length=3)
birth_date = models.DateField(blank=True, null=True)
If you want a form for the ``Author`` model that includes only the ``name``
and ``title`` fields, you would specify ``fields`` or ``exclude`` like
this::
from django.contrib import admin
class AuthorAdmin(admin.ModelAdmin):
fields = ('name', 'title')
class AuthorAdmin(admin.ModelAdmin):
exclude = ('birth_date',)
Since the Author model only has three fields, ``name``, ``title``, and
``birth_date``, the forms resulting from the above declarations will
contain exactly the same fields.
.. attribute:: ModelAdmin.fields
Use the ``fields`` option to make simple layout changes in the forms on
the "add" and "change" pages such as showing only a subset of available
fields, modifying their order, or grouping them into rows. For example, you
could define a simpler version of the admin form for the
:class:`django.contrib.flatpages.models.FlatPage` model as follows::
class FlatPageAdmin(admin.ModelAdmin):
fields = ('url', 'title', 'content')
In the above example, only the fields ``url``, ``title`` and ``content``
will be displayed, sequentially, in the form. ``fields`` can contain
values defined in :attr:`ModelAdmin.readonly_fields` to be displayed as
read-only.
For more complex layout needs, see the :attr:`~ModelAdmin.fieldsets` option.
The ``fields`` option accepts the same types of values as
:attr:`~ModelAdmin.list_display`, except that callables aren't accepted.
Names of model and model admin methods will only be used if they're listed
in :attr:`~ModelAdmin.readonly_fields`.
To display multiple fields on the same line, wrap those fields in their own
tuple. In this example, the ``url`` and ``title`` fields will display on the
same line and the ``content`` field will be displayed below them on its
own line::
class FlatPageAdmin(admin.ModelAdmin):
fields = (('url', 'title'), 'content')
.. admonition:: Note
This ``fields`` option should not be confused with the ``fields``
dictionary key that is within the :attr:`~ModelAdmin.fieldsets` option,
as described in the next section.
If neither ``fields`` nor :attr:`~ModelAdmin.fieldsets` options are present,
Django will default to displaying each field that isn't an ``AutoField`` and
has ``editable=True``, in a single fieldset, in the same order as the fields
are defined in the model.
.. attribute:: ModelAdmin.fieldsets
Set ``fieldsets`` to control the layout of admin "add" and "change" pages.
``fieldsets`` is a list of two-tuples, in which each two-tuple represents a
``<fieldset>`` on the admin form page. (A ``<fieldset>`` is a "section" of
the form.)
The two-tuples are in the format ``(name, field_options)``, where ``name``
is a string representing the title of the fieldset and ``field_options`` is
a dictionary of information about the fieldset, including a list of fields
to be displayed in it.
A full example, taken from the
:class:`django.contrib.flatpages.models.FlatPage` model::
from django.contrib import admin
class FlatPageAdmin(admin.ModelAdmin):
fieldsets = (
(None, {
'fields': ('url', 'title', 'content', 'sites')
}),
('Advanced options', {
'classes': ('collapse',),
'fields': ('registration_required', 'template_name'),
}),
)
This results in an admin page that looks like:
.. image:: _images/fieldsets.png
If neither ``fieldsets`` nor :attr:`~ModelAdmin.fields` options are present,
Django will default to displaying each field that isn't an ``AutoField`` and
has ``editable=True``, in a single fieldset, in the same order as the fields
are defined in the model.
The ``field_options`` dictionary can have the following keys:
* ``fields``
A tuple of field names to display in this fieldset. This key is
required.
Example::
{
'fields': ('first_name', 'last_name', 'address', 'city', 'state'),
}
As with the :attr:`~ModelAdmin.fields` option, to display multiple
fields on the same line, wrap those fields in their own tuple. In this
example, the ``first_name`` and ``last_name`` fields will display on
the same line::
{
'fields': (('first_name', 'last_name'), 'address', 'city', 'state'),
}
``fields`` can contain values defined in
:attr:`~ModelAdmin.readonly_fields` to be displayed as read-only.
If you add the name of a callable to ``fields``, the same rule applies
as with the :attr:`~ModelAdmin.fields` option: the callable must be
listed in :attr:`~ModelAdmin.readonly_fields`.
* ``classes``
A list or tuple containing extra CSS classes to apply to the fieldset.
Example::
{
'classes': ('wide', 'extrapretty'),
}
Two useful classes defined by the default admin site stylesheet are
``collapse`` and ``wide``. Fieldsets with the ``collapse`` style
will be initially collapsed in the admin and replaced with a small
"click to expand" link. Fieldsets with the ``wide`` style will be
given extra horizontal space.
* ``description``
A string of optional extra text to be displayed at the top of each
fieldset, under the heading of the fieldset. This string is not
rendered for :class:`~django.contrib.admin.TabularInline` due to its
layout.
Note that this value is *not* HTML-escaped when it's displayed in
the admin interface. This lets you include HTML if you so desire.
Alternatively you can use plain text and
:func:`django.utils.html.escape` to escape any HTML special
characters.
.. attribute:: ModelAdmin.filter_horizontal
By default, a :class:`~django.db.models.ManyToManyField` is displayed in
the admin site with a ``<select multiple>``. However, multiple-select boxes
can be difficult to use when selecting many items. Adding a
:class:`~django.db.models.ManyToManyField` to this list will instead use
a nifty unobtrusive JavaScript "filter" interface that allows searching
within the options. The unselected and selected options appear in two boxes
side by side. See :attr:`~ModelAdmin.filter_vertical` to use a vertical
interface.
.. attribute:: ModelAdmin.filter_vertical
Same as :attr:`~ModelAdmin.filter_horizontal`, but uses a vertical display
of the filter interface with the box of unselected options appearing above
the box of selected options.
.. attribute:: ModelAdmin.form
By default a ``ModelForm`` is dynamically created for your model. It is
used to create the form presented on both the add/change pages. You can
easily provide your own ``ModelForm`` to override any default form behavior
on the add/change pages. Alternatively, you can customize the default
form rather than specifying an entirely new one by using the
:meth:`ModelAdmin.get_form` method.
For an example see the section :ref:`admin-custom-validation`.
.. admonition:: Note
If you define the ``Meta.model`` attribute on a
:class:`~django.forms.ModelForm`, you must also define the
``Meta.fields`` attribute (or the ``Meta.exclude`` attribute). However,
since the admin has its own way of defining fields, the ``Meta.fields``
attribute will be ignored.
If the ``ModelForm`` is only going to be used for the admin, the easiest
solution is to omit the ``Meta.model`` attribute, since ``ModelAdmin``
will provide the correct model to use. Alternatively, you can set
``fields = []`` in the ``Meta`` class to satisfy the validation on the
``ModelForm``.
.. admonition:: Note
If your ``ModelForm`` and ``ModelAdmin`` both define an ``exclude``
option then ``ModelAdmin`` takes precedence::
from django import forms
from django.contrib import admin
from myapp.models import Person
class PersonForm(forms.ModelForm):
class Meta:
model = Person
exclude = ['name']
class PersonAdmin(admin.ModelAdmin):
exclude = ['age']
form = PersonForm
In the above example, the "age" field will be excluded but the "name"
field will be included in the generated form.
.. attribute:: ModelAdmin.formfield_overrides
This provides a quick-and-dirty way to override some of the
:class:`~django.forms.Field` options for use in the admin.
``formfield_overrides`` is a dictionary mapping a field class to a dict of
arguments to pass to the field at construction time.
Since that's a bit abstract, let's look at a concrete example. The most
common use of ``formfield_overrides`` is to add a custom widget for a
certain type of field. So, imagine we've written a ``RichTextEditorWidget``
that we'd like to use for large text fields instead of the default
``<textarea>``. Here's how we'd do that::
from django.contrib import admin
from django.db import models
# Import our custom widget and our model from where they're defined
from myapp.models import MyModel
from myapp.widgets import RichTextEditorWidget
class MyModelAdmin(admin.ModelAdmin):
formfield_overrides = {
models.TextField: {'widget': RichTextEditorWidget},
}
Note that the key in the dictionary is the actual field class, *not* a
string. The value is another dictionary; these arguments will be passed to
the form field's ``__init__()`` method. See :doc:`/ref/forms/api` for
details.
.. warning::
If you want to use a custom widget with a relation field (i.e.
:class:`~django.db.models.ForeignKey` or
:class:`~django.db.models.ManyToManyField`), make sure you haven't
included that field's name in ``raw_id_fields``, ``radio_fields``, or
``autocomplete_fields``.
``formfield_overrides`` won't let you change the widget on relation
fields that have ``raw_id_fields``, ``radio_fields``, or
``autocomplete_fields`` set. That's because ``raw_id_fields``,
``radio_fields``, and ``autocomplete_fields`` imply custom widgets of
their own.
.. attribute:: ModelAdmin.inlines
See :class:`InlineModelAdmin` objects below as well as
:meth:`ModelAdmin.get_formsets_with_inlines`.
.. attribute:: ModelAdmin.list_display
Set ``list_display`` to control which fields are displayed on the change
list page of the admin.
Example::
list_display = ('first_name', 'last_name')
If you don't set ``list_display``, the admin site will display a single
column that displays the ``__str__()`` representation of each object.
There are four types of values that can be used in ``list_display``:
* The name of a model field. For example::
class PersonAdmin(admin.ModelAdmin):
list_display = ('first_name', 'last_name')
* A callable that accepts one argument, the model instance. For example::
def upper_case_name(obj):
return ("%s %s" % (obj.first_name, obj.last_name)).upper()
upper_case_name.short_description = 'Name'
class PersonAdmin(admin.ModelAdmin):
list_display = (upper_case_name,)
* A string representing a ``ModelAdmin`` method that accepts one argument,
the model instance. For example::
class PersonAdmin(admin.ModelAdmin):
list_display = ('upper_case_name',)
def upper_case_name(self, obj):
return ("%s %s" % (obj.first_name, obj.last_name)).upper()
upper_case_name.short_description = 'Name'
* A string representing a model attribute or method (without any required
arguments). For example::
from django.contrib import admin
from django.db import models
class Person(models.Model):
name = models.CharField(max_length=50)
birthday = models.DateField()
def decade_born_in(self):
return self.birthday.strftime('%Y')[:3] + "0's"
decade_born_in.short_description = 'Birth decade'
class PersonAdmin(admin.ModelAdmin):
list_display = ('name', 'decade_born_in')
A few special cases to note about ``list_display``:
* If the field is a ``ForeignKey``, Django will display the
``__str__()`` of the related object.
* ``ManyToManyField`` fields aren't supported, because that would
entail executing a separate SQL statement for each row in the table.
If you want to do this nonetheless, give your model a custom method,
and add that method's name to ``list_display``. (See below for more
on custom methods in ``list_display``.)
* If the field is a ``BooleanField``, Django will display a pretty "on" or
"off" icon instead of ``True`` or ``False``.
* If the string given is a method of the model, ``ModelAdmin`` or a
callable, Django will HTML-escape the output by default. To escape
user input and allow your own unescaped tags, use
:func:`~django.utils.html.format_html`.
Here's a full example model::
from django.contrib import admin
from django.db import models
from django.utils.html import format_html
class Person(models.Model):
first_name = models.CharField(max_length=50)
last_name = models.CharField(max_length=50)
color_code = models.CharField(max_length=6)
def colored_name(self):
return format_html(
'<span style="color: #{};">{} {}</span>',
self.color_code,
self.first_name,
self.last_name,
)
class PersonAdmin(admin.ModelAdmin):
list_display = ('first_name', 'last_name', 'colored_name')
* As some examples have already demonstrated, when using a callable, a
model method, or a ``ModelAdmin`` method, you can customize the column's
title by adding a ``short_description`` attribute to the callable.
* If the value of a field is ``None``, an empty string, or an iterable
without elements, Django will display ``-`` (a dash). You can override
this with :attr:`AdminSite.empty_value_display`::
from django.contrib import admin
admin.site.empty_value_display = '(None)'
You can also use :attr:`ModelAdmin.empty_value_display`::
class PersonAdmin(admin.ModelAdmin):
empty_value_display = 'unknown'
Or on a field level::
class PersonAdmin(admin.ModelAdmin):
list_display = ('name', 'birth_date_view')
def birth_date_view(self, obj):
return obj.birth_date
birth_date_view.empty_value_display = 'unknown'
* If the string given is a method of the model, ``ModelAdmin`` or a
callable that returns True or False Django will display a pretty
"on" or "off" icon if you give the method a ``boolean`` attribute
whose value is ``True``.
Here's a full example model::
from django.contrib import admin
from django.db import models
class Person(models.Model):
first_name = models.CharField(max_length=50)
birthday = models.DateField()
def born_in_fifties(self):
return self.birthday.strftime('%Y')[:3] == '195'
born_in_fifties.boolean = True
class PersonAdmin(admin.ModelAdmin):
list_display = ('name', 'born_in_fifties')
* The ``__str__()`` method is just as valid in ``list_display`` as any
other model method, so it's perfectly OK to do this::
list_display = ('__str__', 'some_other_field')
* Usually, elements of ``list_display`` that aren't actual database
fields can't be used in sorting (because Django does all the sorting
at the database level).
However, if an element of ``list_display`` represents a certain
database field, you can indicate this fact by setting the
``admin_order_field`` attribute of the item.
For example::
from django.contrib import admin
from django.db import models
from django.utils.html import format_html
class Person(models.Model):
first_name = models.CharField(max_length=50)
color_code = models.CharField(max_length=6)
def colored_first_name(self):
return format_html(
'<span style="color: #{};">{}</span>',
self.color_code,
self.first_name,
)
colored_first_name.admin_order_field = 'first_name'
class PersonAdmin(admin.ModelAdmin):
list_display = ('first_name', 'colored_first_name')
The above will tell Django to order by the ``first_name`` field when
trying to sort by ``colored_first_name`` in the admin.
To indicate descending order with ``admin_order_field`` you can use a
hyphen prefix on the field name. Using the above example, this would
look like::
colored_first_name.admin_order_field = '-first_name'
``admin_order_field`` supports query lookups to sort by values on related
models. This example includes an "author first name" column in the list
display and allows sorting it by first name::
class Blog(models.Model):
title = models.CharField(max_length=255)
author = models.ForeignKey(Person, on_delete=models.CASCADE)
class BlogAdmin(admin.ModelAdmin):
list_display = ('title', 'author', 'author_first_name')
def author_first_name(self, obj):
return obj.author.first_name
author_first_name.admin_order_field = 'author__first_name'
:doc:`Query expressions </ref/models/expressions>` may be used in
``admin_order_field``. For example::
from django.db.models import Value
from django.db.models.functions import Concat
class Person(models.Model):
first_name = models.CharField(max_length=50)
last_name = models.CharField(max_length=50)
def full_name(self):
return self.first_name + ' ' + self.last_name
full_name.admin_order_field = Concat('first_name', Value(' '), 'last_name')
* Elements of ``list_display`` can also be properties. Please note however,
that due to the way properties work in Python, setting
``short_description`` or ``admin_order_field`` on a property is only
possible when using the ``property()`` function and **not** with the
``@property`` decorator.
For example::
class Person(models.Model):
first_name = models.CharField(max_length=50)
last_name = models.CharField(max_length=50)
def my_property(self):
return self.first_name + ' ' + self.last_name
my_property.short_description = "Full name of the person"
my_property.admin_order_field = 'last_name'
full_name = property(my_property)
class PersonAdmin(admin.ModelAdmin):
list_display = ('full_name',)
* The field names in ``list_display`` will also appear as CSS classes in
the HTML output, in the form of ``column-<field_name>`` on each ``<th>``
element. This can be used to set column widths in a CSS file for example.
* Django will try to interpret every element of ``list_display`` in this
order:
* A field of the model.
* A callable.
* A string representing a ``ModelAdmin`` attribute.
* A string representing a model attribute.
For example if you have ``first_name`` as a model field and
as a ``ModelAdmin`` attribute, the model field will be used.
.. attribute:: ModelAdmin.list_display_links
Use ``list_display_links`` to control if and which fields in
:attr:`list_display` should be linked to the "change" page for an object.
By default, the change list page will link the first column -- the first
field specified in ``list_display`` -- to the change page for each item.
But ``list_display_links`` lets you change this:
* Set it to ``None`` to get no links at all.
* Set it to a list or tuple of fields (in the same format as
``list_display``) whose columns you want converted to links.
You can specify one or many fields. As long as the fields appear in
``list_display``, Django doesn't care how many (or how few) fields are
linked. The only requirement is that if you want to use
``list_display_links`` in this fashion, you must define ``list_display``.
In this example, the ``first_name`` and ``last_name`` fields will be
linked on the change list page::
class PersonAdmin(admin.ModelAdmin):
list_display = ('first_name', 'last_name', 'birthday')
list_display_links = ('first_name', 'last_name')
In this example, the change list page grid will have no links::
class AuditEntryAdmin(admin.ModelAdmin):
list_display = ('timestamp', 'message')
list_display_links = None
.. _admin-list-editable:
.. attribute:: ModelAdmin.list_editable
Set ``list_editable`` to a list of field names on the model which will
allow editing on the change list page. That is, fields listed in
``list_editable`` will be displayed as form widgets on the change list
page, allowing users to edit and save multiple rows at once.
.. note::
``list_editable`` interacts with a couple of other options in
particular ways; you should note the following rules:
* Any field in ``list_editable`` must also be in ``list_display``.
You can't edit a field that's not displayed!
* The same field can't be listed in both ``list_editable`` and
``list_display_links`` -- a field can't be both a form and
a link.
You'll get a validation error if either of these rules are broken.
.. attribute:: ModelAdmin.list_filter
Set ``list_filter`` to activate filters in the right sidebar of the change
list page of the admin, as illustrated in the following screenshot:
.. image:: _images/list_filter.png
``list_filter`` should be a list or tuple of elements, where each element
should be of one of the following types:
* a field name, where the specified field should be either a
``BooleanField``, ``CharField``, ``DateField``, ``DateTimeField``,
``IntegerField``, ``ForeignKey`` or ``ManyToManyField``, for example::
class PersonAdmin(admin.ModelAdmin):
list_filter = ('is_staff', 'company')
Field names in ``list_filter`` can also span relations
using the ``__`` lookup, for example::
class PersonAdmin(admin.UserAdmin):
list_filter = ('company__name',)
* a class inheriting from ``django.contrib.admin.SimpleListFilter``,
which you need to provide the ``title`` and ``parameter_name``
attributes to and override the ``lookups`` and ``queryset`` methods,
e.g.::
from datetime import date
from django.contrib import admin
from django.utils.translation import gettext_lazy as _
class DecadeBornListFilter(admin.SimpleListFilter):
# Human-readable title which will be displayed in the
# right admin sidebar just above the filter options.
title = _('decade born')
# Parameter for the filter that will be used in the URL query.
parameter_name = 'decade'
def lookups(self, request, model_admin):
"""
Returns a list of tuples. The first element in each
tuple is the coded value for the option that will
appear in the URL query. The second element is the
human-readable name for the option that will appear
in the right sidebar.
"""
return (
('80s', _('in the eighties')),
('90s', _('in the nineties')),
)
def queryset(self, request, queryset):
"""
Returns the filtered queryset based on the value
provided in the query string and retrievable via
`self.value()`.
"""
# Compare the requested value (either '80s' or '90s')
# to decide how to filter the queryset.
if self.value() == '80s':
return queryset.filter(birthday__gte=date(1980, 1, 1),
birthday__lte=date(1989, 12, 31))
if self.value() == '90s':
return queryset.filter(birthday__gte=date(1990, 1, 1),
birthday__lte=date(1999, 12, 31))
class PersonAdmin(admin.ModelAdmin):
list_filter = (DecadeBornListFilter,)
.. note::
As a convenience, the ``HttpRequest`` object is passed to the
``lookups`` and ``queryset`` methods, for example::
class AuthDecadeBornListFilter(DecadeBornListFilter):
def lookups(self, request, model_admin):
if request.user.is_superuser:
return super().lookups(request, model_admin)
def queryset(self, request, queryset):
if request.user.is_superuser:
return super().queryset(request, queryset)
Also as a convenience, the ``ModelAdmin`` object is passed to
the ``lookups`` method, for example if you want to base the
lookups on the available data::
class AdvancedDecadeBornListFilter(DecadeBornListFilter):
def lookups(self, request, model_admin):
"""
Only show the lookups if there actually is
anyone born in the corresponding decades.
"""
qs = model_admin.get_queryset(request)
if qs.filter(birthday__gte=date(1980, 1, 1),
birthday__lte=date(1989, 12, 31)).exists():
yield ('80s', _('in the eighties'))
if qs.filter(birthday__gte=date(1990, 1, 1),
birthday__lte=date(1999, 12, 31)).exists():
yield ('90s', _('in the nineties'))
* a tuple, where the first element is a field name and the second
element is a class inheriting from
``django.contrib.admin.FieldListFilter``, for example::
class PersonAdmin(admin.ModelAdmin):
list_filter = (
('is_staff', admin.BooleanFieldListFilter),
)
You can limit the choices of a related model to the objects involved in
that relation using ``RelatedOnlyFieldListFilter``::
class BookAdmin(admin.ModelAdmin):
list_filter = (
('author', admin.RelatedOnlyFieldListFilter),
)
Assuming ``author`` is a ``ForeignKey`` to a ``User`` model, this will
limit the ``list_filter`` choices to the users who have written a book
instead of listing all users.
.. note::
The ``FieldListFilter`` API is considered internal and might be
changed.
List filter's typically appear only if the filter has more than one choice.
A filter's ``has_output()`` method controls whether or not it appears.
It is possible to specify a custom template for rendering a list filter::
class FilterWithCustomTemplate(admin.SimpleListFilter):
template = "custom_template.html"
See the default template provided by Django (``admin/filter.html``) for
a concrete example.
.. attribute:: ModelAdmin.list_max_show_all
Set ``list_max_show_all`` to control how many items can appear on a "Show
all" admin change list page. The admin will display a "Show all" link on the
change list only if the total result count is less than or equal to this
setting. By default, this is set to ``200``.
.. attribute:: ModelAdmin.list_per_page
Set ``list_per_page`` to control how many items appear on each paginated
admin change list page. By default, this is set to ``100``.
.. attribute:: ModelAdmin.list_select_related
Set ``list_select_related`` to tell Django to use
:meth:`~django.db.models.query.QuerySet.select_related` in retrieving
the list of objects on the admin change list page. This can save you a
bunch of database queries.
The value should be either a boolean, a list or a tuple. Default is
``False``.
When value is ``True``, ``select_related()`` will always be called. When
value is set to ``False``, Django will look at ``list_display`` and call
``select_related()`` if any ``ForeignKey`` is present.
If you need more fine-grained control, use a tuple (or list) as value for
``list_select_related``. Empty tuple will prevent Django from calling
``select_related`` at all. Any other tuple will be passed directly to
``select_related`` as parameters. For example::
class ArticleAdmin(admin.ModelAdmin):
list_select_related = ('author', 'category')
will call ``select_related('author', 'category')``.
If you need to specify a dynamic value based on the request, you can
implement a :meth:`~ModelAdmin.get_list_select_related` method.
.. attribute:: ModelAdmin.ordering
Set ``ordering`` to specify how lists of objects should be ordered in the
Django admin views. This should be a list or tuple in the same format as a
model's :attr:`~django.db.models.Options.ordering` parameter.
If this isn't provided, the Django admin will use the model's default
ordering.
If you need to specify a dynamic order (for example depending on user or
language) you can implement a :meth:`~ModelAdmin.get_ordering` method.
.. admonition:: Performance considerations with ordering and sorting
To ensure a deterministic ordering of results, the changelist adds
``pk`` to the ordering if it can't find a single or unique together set
of fields that provide total ordering.
For example, if the default ordering is by a non-unique ``name`` field,
then the changelist is sorted by ``name`` and ``pk``. This could
perform poorly if you have a lot of rows and don't have an index on
``name`` and ``pk``.
.. attribute:: ModelAdmin.paginator
The paginator class to be used for pagination. By default,
:class:`django.core.paginator.Paginator` is used. If the custom paginator
class doesn't have the same constructor interface as
:class:`django.core.paginator.Paginator`, you will also need to
provide an implementation for :meth:`ModelAdmin.get_paginator`.
.. attribute:: ModelAdmin.prepopulated_fields
Set ``prepopulated_fields`` to a dictionary mapping field names to the
fields it should prepopulate from::
class ArticleAdmin(admin.ModelAdmin):
prepopulated_fields = {"slug": ("title",)}
When set, the given fields will use a bit of JavaScript to populate from
the fields assigned. The main use for this functionality is to
automatically generate the value for ``SlugField`` fields from one or more
other fields. The generated value is produced by concatenating the values
of the source fields, and then by transforming that result into a valid
slug (e.g. substituting dashes for spaces; lowercasing ASCII letters; and
removing various English stop words such as 'a', 'an', 'as', and similar).
Prepopulated fields aren't modified by JavaScript after a value has been
saved. It's usually undesired that slugs change (which would cause an
object's URL to change if the slug is used in it).
``prepopulated_fields`` doesn't accept ``DateTimeField``, ``ForeignKey``,
``OneToOneField``, and ``ManyToManyField`` fields.
.. attribute:: ModelAdmin.preserve_filters
The admin now preserves filters on the list view after creating, editing
or deleting an object. You can restore the previous behavior of clearing
filters by setting this attribute to ``False``.
.. attribute:: ModelAdmin.radio_fields
By default, Django's admin uses a select-box interface (<select>) for
fields that are ``ForeignKey`` or have ``choices`` set. If a field is
present in ``radio_fields``, Django will use a radio-button interface
instead. Assuming ``group`` is a ``ForeignKey`` on the ``Person`` model::
class PersonAdmin(admin.ModelAdmin):
radio_fields = {"group": admin.VERTICAL}
You have the choice of using ``HORIZONTAL`` or ``VERTICAL`` from the
``django.contrib.admin`` module.
Don't include a field in ``radio_fields`` unless it's a ``ForeignKey`` or has
``choices`` set.
.. attribute:: ModelAdmin.autocomplete_fields
``autocomplete_fields`` is a list of ``ForeignKey`` and/or
``ManyToManyField`` fields you would like to change to `Select2
<https://select2.org/>`_ autocomplete inputs.
By default, the admin uses a select-box interface (``<select>``) for
those fields. Sometimes you don't want to incur the overhead of selecting
all the related instances to display in the dropdown.
The Select2 input looks similar to the default input but comes with a
search feature that loads the options asynchronously. This is faster and
more user-friendly if the related model has many instances.
You must define :attr:`~ModelAdmin.search_fields` on the related object's
``ModelAdmin`` because the autocomplete search uses it.
To avoid unauthorized data disclosure, users must have the ``view`` or
``change`` permission to the related object in order to use autocomplete.
Ordering and pagination of the results are controlled by the related
``ModelAdmin``'s :meth:`~ModelAdmin.get_ordering` and
:meth:`~ModelAdmin.get_paginator` methods.
In the following example, ``ChoiceAdmin`` has an autocomplete field for the
``ForeignKey`` to the ``Question``. The results are filtered by the
``question_text`` field and ordered by the ``date_created`` field::
class QuestionAdmin(admin.ModelAdmin):
ordering = ['date_created']
search_fields = ['question_text']
class ChoiceAdmin(admin.ModelAdmin):
autocomplete_fields = ['question']
.. admonition:: Performance considerations for large datasets
Ordering using :attr:`ModelAdmin.ordering` may cause performance
problems as sorting on a large queryset will be slow.
Also, if your search fields include fields that aren't indexed by the
database, you might encounter poor performance on extremely large
tables.
For those cases, it's a good idea to write your own
:func:`ModelAdmin.get_search_results` implementation using a
full-text indexed search.
You may also want to change the ``Paginator`` on very large tables
as the default paginator always performs a ``count()`` query.
For example, you could override the default implementation of the
``Paginator.count`` property.
.. attribute:: ModelAdmin.raw_id_fields
By default, Django's admin uses a select-box interface (<select>) for
fields that are ``ForeignKey``. Sometimes you don't want to incur the
overhead of having to select all the related instances to display in the
drop-down.
``raw_id_fields`` is a list of fields you would like to change
into an ``Input`` widget for either a ``ForeignKey`` or
``ManyToManyField``::
class ArticleAdmin(admin.ModelAdmin):
raw_id_fields = ("newspaper",)
The ``raw_id_fields`` ``Input`` widget should contain a primary key if the
field is a ``ForeignKey`` or a comma separated list of values if the field
is a ``ManyToManyField``. The ``raw_id_fields`` widget shows a magnifying
glass button next to the field which allows users to search for and select
a value:
.. image:: _images/raw_id_fields.png
.. attribute:: ModelAdmin.readonly_fields
By default the admin shows all fields as editable. Any fields in this
option (which should be a ``list`` or ``tuple``) will display its data
as-is and non-editable; they are also excluded from the
:class:`~django.forms.ModelForm` used for creating and editing. Note that
when specifying :attr:`ModelAdmin.fields` or :attr:`ModelAdmin.fieldsets`
the read-only fields must be present to be shown (they are ignored
otherwise).
If ``readonly_fields`` is used without defining explicit ordering through
:attr:`ModelAdmin.fields` or :attr:`ModelAdmin.fieldsets` they will be
added last after all editable fields.
A read-only field can not only display data from a model's field, it can
also display the output of a model's method or a method of the
``ModelAdmin`` class itself. This is very similar to the way
:attr:`ModelAdmin.list_display` behaves. This provides a way to use the
admin interface to provide feedback on the status of the objects being
edited, for example::
from django.contrib import admin
from django.utils.html import format_html_join
from django.utils.safestring import mark_safe
class PersonAdmin(admin.ModelAdmin):
readonly_fields = ('address_report',)
def address_report(self, instance):
# assuming get_full_address() returns a list of strings
# for each line of the address and you want to separate each
# line by a linebreak
return format_html_join(
mark_safe('<br>'),
'{}',
((line,) for line in instance.get_full_address()),
) or mark_safe("<span class='errors'>I can't determine this address.</span>")
# short_description functions like a model field's verbose_name
address_report.short_description = "Address"
.. attribute:: ModelAdmin.save_as
Set ``save_as`` to enable a "save as new" feature on admin change forms.
Normally, objects have three save options: "Save", "Save and continue
editing", and "Save and add another". If ``save_as`` is ``True``, "Save
and add another" will be replaced by a "Save as new" button that creates a
new object (with a new ID) rather than updating the existing object.
By default, ``save_as`` is set to ``False``.
.. attribute:: ModelAdmin.save_as_continue
When :attr:`save_as=True <save_as>`, the default redirect after saving the
new object is to the change view for that object. If you set
``save_as_continue=False``, the redirect will be to the changelist view.
By default, ``save_as_continue`` is set to ``True``.
.. attribute:: ModelAdmin.save_on_top
Set ``save_on_top`` to add save buttons across the top of your admin change
forms.
Normally, the save buttons appear only at the bottom of the forms. If you
set ``save_on_top``, the buttons will appear both on the top and the
bottom.
By default, ``save_on_top`` is set to ``False``.
.. attribute:: ModelAdmin.search_fields
Set ``search_fields`` to enable a search box on the admin change list page.
This should be set to a list of field names that will be searched whenever
somebody submits a search query in that text box.
These fields should be some kind of text field, such as ``CharField`` or
``TextField``. You can also perform a related lookup on a ``ForeignKey`` or
``ManyToManyField`` with the lookup API "follow" notation::
search_fields = ['foreign_key__related_fieldname']
For example, if you have a blog entry with an author, the following
definition would enable searching blog entries by the email address of the
author::
search_fields = ['user__email']
When somebody does a search in the admin search box, Django splits the
search query into words and returns all objects that contain each of the
words, case-insensitive (using the :lookup:`icontains` lookup), where each
word must be in at least one of ``search_fields``. For example, if
``search_fields`` is set to ``['first_name', 'last_name']`` and a user
searches for ``john lennon``, Django will do the equivalent of this SQL
``WHERE`` clause:
.. code-block:: sql
WHERE (first_name ILIKE '%john%' OR last_name ILIKE '%john%')
AND (first_name ILIKE '%lennon%' OR last_name ILIKE '%lennon%')
If you don't want to use ``icontains`` as the lookup, you can use any
lookup by appending it the field. For example, you could use :lookup:`exact`
by setting ``search_fields`` to ``['first_name__exact']``.
Beware that because query terms are split and ANDed as described earlier,
searching with :lookup:`exact` only works with a single search word since
two or more words can't all be an exact match unless all words are the same.
Some (older) shortcuts for specifying a field lookup are also available.
You can prefix a field in ``search_fields`` with the following characters
and it's equivalent to adding ``__<lookup>`` to the field:
====== ====================
Prefix Lookup
====== ====================
^ :lookup:`startswith`
= :lookup:`iexact`
@ :lookup:`search`
None :lookup:`icontains`
====== ====================
If you need to customize search you can use
:meth:`ModelAdmin.get_search_results` to provide additional or alternate
search behavior.
.. attribute:: ModelAdmin.show_full_result_count
Set ``show_full_result_count`` to control whether the full count of objects
should be displayed on a filtered admin page (e.g. ``99 results (103 total)``).
If this option is set to ``False``, a text like ``99 results (Show all)``
is displayed instead.
The default of ``show_full_result_count=True`` generates a query to perform
a full count on the table which can be expensive if the table contains a
large number of rows.
.. attribute:: ModelAdmin.sortable_by
By default, the change list page allows sorting by all model fields (and
callables that have the ``admin_order_field`` property) specified in
:attr:`list_display`.
If you want to disable sorting for some columns, set ``sortable_by`` to
a collection (e.g. ``list``, ``tuple``, or ``set``) of the subset of
:attr:`list_display` that you want to be sortable. An empty collection
disables sorting for all columns.
If you need to specify this list dynamically, implement a
:meth:`~ModelAdmin.get_sortable_by` method instead.
.. attribute:: ModelAdmin.view_on_site
Set ``view_on_site`` to control whether or not to display the "View on site" link.
This link should bring you to a URL where you can display the saved object.
This value can be either a boolean flag or a callable. If ``True`` (the
default), the object's :meth:`~django.db.models.Model.get_absolute_url`
method will be used to generate the url.
If your model has a :meth:`~django.db.models.Model.get_absolute_url` method
but you don't want the "View on site" button to appear, you only need to set
``view_on_site`` to ``False``::
from django.contrib import admin
class PersonAdmin(admin.ModelAdmin):
view_on_site = False
In case it is a callable, it accepts the model instance as a parameter.
For example::
from django.contrib import admin
from django.urls import reverse
class PersonAdmin(admin.ModelAdmin):
def view_on_site(self, obj):
url = reverse('person-detail', kwargs={'slug': obj.slug})
return 'https://example.com' + url
Custom template options
~~~~~~~~~~~~~~~~~~~~~~~
The :ref:`admin-overriding-templates` section describes how to override or extend
the default admin templates. Use the following options to override the default
templates used by the :class:`ModelAdmin` views:
.. attribute:: ModelAdmin.add_form_template
Path to a custom template, used by :meth:`add_view`.
.. attribute:: ModelAdmin.change_form_template
Path to a custom template, used by :meth:`change_view`.
.. attribute:: ModelAdmin.change_list_template
Path to a custom template, used by :meth:`changelist_view`.
.. attribute:: ModelAdmin.delete_confirmation_template
Path to a custom template, used by :meth:`delete_view` for displaying a
confirmation page when deleting one or more objects.
.. attribute:: ModelAdmin.delete_selected_confirmation_template
Path to a custom template, used by the ``delete_selected`` action method
for displaying a confirmation page when deleting one or more objects. See
the :doc:`actions documentation</ref/contrib/admin/actions>`.
.. attribute:: ModelAdmin.object_history_template
Path to a custom template, used by :meth:`history_view`.
.. attribute:: ModelAdmin.popup_response_template
Path to a custom template, used by :meth:`response_add`,
:meth:`response_change`, and :meth:`response_delete`.
.. _model-admin-methods:
``ModelAdmin`` methods
----------------------
.. warning::
When overriding :meth:`ModelAdmin.save_model` and
:meth:`ModelAdmin.delete_model`, your code must save/delete the
object. They aren't meant for veto purposes, rather they allow you to
perform extra operations.
.. method:: ModelAdmin.save_model(request, obj, form, change)
The ``save_model`` method is given the ``HttpRequest``, a model instance,
a ``ModelForm`` instance, and a boolean value based on whether it is adding
or changing the object. Overriding this method allows doing pre- or
post-save operations. Call ``super().save_model()`` to save the object
using :meth:`.Model.save`.
For example to attach ``request.user`` to the object prior to saving::
from django.contrib import admin
class ArticleAdmin(admin.ModelAdmin):
def save_model(self, request, obj, form, change):
obj.user = request.user
super().save_model(request, obj, form, change)
.. method:: ModelAdmin.delete_model(request, obj)
The ``delete_model`` method is given the ``HttpRequest`` and a model
instance. Overriding this method allows doing pre- or post-delete
operations. Call ``super().delete_model()`` to delete the object using
:meth:`.Model.delete`.
.. method:: ModelAdmin.delete_queryset(request, queryset)
The ``delete_queryset()`` method is given the ``HttpRequest`` and a
``QuerySet`` of objects to be deleted. Override this method to customize
the deletion process for the "delete selected objects" :doc:`action
<actions>`.
.. method:: ModelAdmin.save_formset(request, form, formset, change)
The ``save_formset`` method is given the ``HttpRequest``, the parent
``ModelForm`` instance and a boolean value based on whether it is adding or
changing the parent object.
For example, to attach ``request.user`` to each changed formset
model instance::
class ArticleAdmin(admin.ModelAdmin):
def save_formset(self, request, form, formset, change):
instances = formset.save(commit=False)
for obj in formset.deleted_objects:
obj.delete()
for instance in instances:
instance.user = request.user
instance.save()
formset.save_m2m()
See also :ref:`saving-objects-in-the-formset`.
.. method:: ModelAdmin.get_ordering(request)
The ``get_ordering`` method takes a ``request`` as parameter and
is expected to return a ``list`` or ``tuple`` for ordering similar
to the :attr:`ordering` attribute. For example::
class PersonAdmin(admin.ModelAdmin):
def get_ordering(self, request):
if request.user.is_superuser:
return ['name', 'rank']
else:
return ['name']
.. method:: ModelAdmin.get_search_results(request, queryset, search_term)
The ``get_search_results`` method modifies the list of objects displayed
into those that match the provided search term. It accepts the request, a
queryset that applies the current filters, and the user-provided search term.
It returns a tuple containing a queryset modified to implement the search, and
a boolean indicating if the results may contain duplicates.
The default implementation searches the fields named in :attr:`ModelAdmin.search_fields`.
This method may be overridden with your own custom search method. For
example, you might wish to search by an integer field, or use an external
tool such as Solr or Haystack. You must establish if the queryset changes
implemented by your search method may introduce duplicates into the results,
and return ``True`` in the second element of the return value.
For example, to search by ``name`` and ``age``, you could use::
class PersonAdmin(admin.ModelAdmin):
list_display = ('name', 'age')
search_fields = ('name',)
def get_search_results(self, request, queryset, search_term):
queryset, use_distinct = super().get_search_results(request, queryset, search_term)
try:
search_term_as_int = int(search_term)
except ValueError:
pass
else:
queryset |= self.model.objects.filter(age=search_term_as_int)
return queryset, use_distinct
This implementation is more efficient than ``search_fields =
('name', '=age')`` which results in a string comparison for the numeric
field, for example ``... OR UPPER("polls_choice"."votes"::text) = UPPER('4')``
on PostgreSQL.
.. method:: ModelAdmin.save_related(request, form, formsets, change)
The ``save_related`` method is given the ``HttpRequest``, the parent
``ModelForm`` instance, the list of inline formsets and a boolean value
based on whether the parent is being added or changed. Here you can do any
pre- or post-save operations for objects related to the parent. Note
that at this point the parent object and its form have already been saved.
.. method:: ModelAdmin.get_autocomplete_fields(request)
The ``get_autocomplete_fields()`` method is given the ``HttpRequest`` and is
expected to return a ``list`` or ``tuple`` of field names that will be
displayed with an autocomplete widget as described above in the
:attr:`ModelAdmin.autocomplete_fields` section.
.. method:: ModelAdmin.get_readonly_fields(request, obj=None)
The ``get_readonly_fields`` method is given the ``HttpRequest`` and the
``obj`` being edited (or ``None`` on an add form) and is expected to return
a ``list`` or ``tuple`` of field names that will be displayed as read-only,
as described above in the :attr:`ModelAdmin.readonly_fields` section.
.. method:: ModelAdmin.get_prepopulated_fields(request, obj=None)
The ``get_prepopulated_fields`` method is given the ``HttpRequest`` and the
``obj`` being edited (or ``None`` on an add form) and is expected to return
a ``dictionary``, as described above in the :attr:`ModelAdmin.prepopulated_fields`
section.
.. method:: ModelAdmin.get_list_display(request)
The ``get_list_display`` method is given the ``HttpRequest`` and is
expected to return a ``list`` or ``tuple`` of field names that will be
displayed on the changelist view as described above in the
:attr:`ModelAdmin.list_display` section.
.. method:: ModelAdmin.get_list_display_links(request, list_display)
The ``get_list_display_links`` method is given the ``HttpRequest`` and
the ``list`` or ``tuple`` returned by :meth:`ModelAdmin.get_list_display`.
It is expected to return either ``None`` or a ``list`` or ``tuple`` of field
names on the changelist that will be linked to the change view, as described
in the :attr:`ModelAdmin.list_display_links` section.
.. method:: ModelAdmin.get_exclude(request, obj=None)
The ``get_exclude`` method is given the ``HttpRequest`` and the ``obj``
being edited (or ``None`` on an add form) and is expected to return a list
of fields, as described in :attr:`ModelAdmin.exclude`.
.. method:: ModelAdmin.get_fields(request, obj=None)
The ``get_fields`` method is given the ``HttpRequest`` and the ``obj``
being edited (or ``None`` on an add form) and is expected to return a list
of fields, as described above in the :attr:`ModelAdmin.fields` section.
.. method:: ModelAdmin.get_fieldsets(request, obj=None)
The ``get_fieldsets`` method is given the ``HttpRequest`` and the ``obj``
being edited (or ``None`` on an add form) and is expected to return a list
of two-tuples, in which each two-tuple represents a ``<fieldset>`` on the
admin form page, as described above in the :attr:`ModelAdmin.fieldsets` section.
.. method:: ModelAdmin.get_list_filter(request)
The ``get_list_filter`` method is given the ``HttpRequest`` and is expected
to return the same kind of sequence type as for the
:attr:`~ModelAdmin.list_filter` attribute.
.. method:: ModelAdmin.get_list_select_related(request)
The ``get_list_select_related`` method is given the ``HttpRequest`` and
should return a boolean or list as :attr:`ModelAdmin.list_select_related`
does.
.. method:: ModelAdmin.get_search_fields(request)
The ``get_search_fields`` method is given the ``HttpRequest`` and is expected
to return the same kind of sequence type as for the
:attr:`~ModelAdmin.search_fields` attribute.
.. method:: ModelAdmin.get_sortable_by(request)
The ``get_sortable_by()`` method is passed the ``HttpRequest`` and is
expected to return a collection (e.g. ``list``, ``tuple``, or ``set``) of
field names that will be sortable in the change list page.
Its default implementation returns :attr:`sortable_by` if it's set,
otherwise it defers to :meth:`get_list_display`.
For example, to prevent one or more columns from being sortable::
class PersonAdmin(admin.ModelAdmin):
def get_sortable_by(self, request):
return {*self.get_list_display(request)} - {'rank'}
.. method:: ModelAdmin.get_inline_instances(request, obj=None)
The ``get_inline_instances`` method is given the ``HttpRequest`` and the
``obj`` being edited (or ``None`` on an add form) and is expected to return
a ``list`` or ``tuple`` of :class:`~django.contrib.admin.InlineModelAdmin`
objects, as described below in the :class:`~django.contrib.admin.InlineModelAdmin`
section. For example, the following would return inlines without the default
filtering based on add, change, delete, and view permissions::
class MyModelAdmin(admin.ModelAdmin):
inlines = (MyInline,)
def get_inline_instances(self, request, obj=None):
return [inline(self.model, self.admin_site) for inline in self.inlines]
If you override this method, make sure that the returned inlines are
instances of the classes defined in :attr:`inlines` or you might encounter
a "Bad Request" error when adding related objects.
.. method:: ModelAdmin.get_inlines(request, obj)
.. versionadded:: 3.0
The ``get_inlines`` method is given the ``HttpRequest`` and the
``obj`` being edited (or ``None`` on an add form) and is expected to return
an iterable of inlines. You can override this method to dynamically add
inlines based on the request or model instance instead of specifying them
in :attr:`ModelAdmin.inlines`.
.. method:: ModelAdmin.get_urls()
The ``get_urls`` method on a ``ModelAdmin`` returns the URLs to be used for
that ModelAdmin in the same way as a URLconf. Therefore you can extend
them as documented in :doc:`/topics/http/urls`::
from django.contrib import admin
from django.template.response import TemplateResponse
from django.urls import path
class MyModelAdmin(admin.ModelAdmin):
def get_urls(self):
urls = super().get_urls()
my_urls = [
path('my_view/', self.my_view),
]
return my_urls + urls
def my_view(self, request):
# ...
context = dict(
# Include common variables for rendering the admin template.
self.admin_site.each_context(request),
# Anything else you want in the context...
key=value,
)
return TemplateResponse(request, "sometemplate.html", context)
If you want to use the admin layout, extend from ``admin/base_site.html``:
.. code-block:: html+django
{% extends "admin/base_site.html" %}
{% block content %}
...
{% endblock %}
.. note::
Notice that the custom patterns are included *before* the regular admin
URLs: the admin URL patterns are very permissive and will match nearly
anything, so you'll usually want to prepend your custom URLs to the
built-in ones.
In this example, ``my_view`` will be accessed at
``/admin/myapp/mymodel/my_view/`` (assuming the admin URLs are included
at ``/admin/``.)
However, the ``self.my_view`` function registered above suffers from two
problems:
* It will *not* perform any permission checks, so it will be accessible
to the general public.
* It will *not* provide any header details to prevent caching. This means
if the page retrieves data from the database, and caching middleware is
active, the page could show outdated information.
Since this is usually not what you want, Django provides a convenience
wrapper to check permissions and mark the view as non-cacheable. This
wrapper is ``AdminSite.admin_view()`` (i.e. ``self.admin_site.admin_view``
inside a ``ModelAdmin`` instance); use it like so::
class MyModelAdmin(admin.ModelAdmin):
def get_urls(self):
urls = super().get_urls()
my_urls = [
path('my_view/', self.admin_site.admin_view(self.my_view))
]
return my_urls + urls
Notice the wrapped view in the fifth line above::
path('my_view/', self.admin_site.admin_view(self.my_view))
This wrapping will protect ``self.my_view`` from unauthorized access and
will apply the :func:`django.views.decorators.cache.never_cache` decorator to
make sure it is not cached if the cache middleware is active.
If the page is cacheable, but you still want the permission check to be
performed, you can pass a ``cacheable=True`` argument to
``AdminSite.admin_view()``::
path('my_view/', self.admin_site.admin_view(self.my_view, cacheable=True))
``ModelAdmin`` views have ``model_admin`` attributes. Other
``AdminSite`` views have ``admin_site`` attributes.
.. method:: ModelAdmin.get_form(request, obj=None, **kwargs)
Returns a :class:`~django.forms.ModelForm` class for use in the admin add
and change views, see :meth:`add_view` and :meth:`change_view`.
The base implementation uses :func:`~django.forms.models.modelform_factory`
to subclass :attr:`~form`, modified by attributes such as :attr:`~fields`
and :attr:`~exclude`. So, for example, if you wanted to offer additional
fields to superusers, you could swap in a different base form like so::
class MyModelAdmin(admin.ModelAdmin):
def get_form(self, request, obj=None, **kwargs):
if request.user.is_superuser:
kwargs['form'] = MySuperuserForm
return super().get_form(request, obj, **kwargs)
You may also return a custom :class:`~django.forms.ModelForm` class
directly.
.. method:: ModelAdmin.get_formsets_with_inlines(request, obj=None)
Yields (``FormSet``, :class:`InlineModelAdmin`) pairs for use in admin add
and change views.
For example if you wanted to display a particular inline only in the change
view, you could override ``get_formsets_with_inlines`` as follows::
class MyModelAdmin(admin.ModelAdmin):
inlines = [MyInline, SomeOtherInline]
def get_formsets_with_inlines(self, request, obj=None):
for inline in self.get_inline_instances(request, obj):
# hide MyInline in the add view
if not isinstance(inline, MyInline) or obj is not None:
yield inline.get_formset(request, obj), inline
.. method:: ModelAdmin.formfield_for_foreignkey(db_field, request, **kwargs)
The ``formfield_for_foreignkey`` method on a ``ModelAdmin`` allows you to
override the default formfield for a foreign keys field. For example, to
return a subset of objects for this foreign key field based on the user::
class MyModelAdmin(admin.ModelAdmin):
def formfield_for_foreignkey(self, db_field, request, **kwargs):
if db_field.name == "car":
kwargs["queryset"] = Car.objects.filter(owner=request.user)
return super().formfield_for_foreignkey(db_field, request, **kwargs)
This uses the ``HttpRequest`` instance to filter the ``Car`` foreign key
field to only display the cars owned by the ``User`` instance.
.. method:: ModelAdmin.formfield_for_manytomany(db_field, request, **kwargs)
Like the ``formfield_for_foreignkey`` method, the
``formfield_for_manytomany`` method can be overridden to change the
default formfield for a many to many field. For example, if an owner can
own multiple cars and cars can belong to multiple owners -- a many to
many relationship -- you could filter the ``Car`` foreign key field to
only display the cars owned by the ``User``::
class MyModelAdmin(admin.ModelAdmin):
def formfield_for_manytomany(self, db_field, request, **kwargs):
if db_field.name == "cars":
kwargs["queryset"] = Car.objects.filter(owner=request.user)
return super().formfield_for_manytomany(db_field, request, **kwargs)
.. method:: ModelAdmin.formfield_for_choice_field(db_field, request, **kwargs)
Like the ``formfield_for_foreignkey`` and ``formfield_for_manytomany``
methods, the ``formfield_for_choice_field`` method can be overridden to
change the default formfield for a field that has declared choices. For
example, if the choices available to a superuser should be different than
those available to regular staff, you could proceed as follows::
class MyModelAdmin(admin.ModelAdmin):
def formfield_for_choice_field(self, db_field, request, **kwargs):
if db_field.name == "status":
kwargs['choices'] = (
('accepted', 'Accepted'),
('denied', 'Denied'),
)
if request.user.is_superuser:
kwargs['choices'] += (('ready', 'Ready for deployment'),)
return super().formfield_for_choice_field(db_field, request, **kwargs)
.. admonition:: Note
Any ``choices`` attribute set on the formfield will be limited to the
form field only. If the corresponding field on the model has choices
set, the choices provided to the form must be a valid subset of those
choices, otherwise the form submission will fail with
a :exc:`~django.core.exceptions.ValidationError` when the model itself
is validated before saving.
.. method:: ModelAdmin.get_changelist(request, **kwargs)
Returns the ``Changelist`` class to be used for listing. By default,
``django.contrib.admin.views.main.ChangeList`` is used. By inheriting this
class you can change the behavior of the listing.
.. method:: ModelAdmin.get_changelist_form(request, **kwargs)
Returns a :class:`~django.forms.ModelForm` class for use in the ``Formset``
on the changelist page. To use a custom form, for example::
from django import forms
class MyForm(forms.ModelForm):
pass
class MyModelAdmin(admin.ModelAdmin):
def get_changelist_form(self, request, **kwargs):
return MyForm
.. admonition:: Note
If you define the ``Meta.model`` attribute on a
:class:`~django.forms.ModelForm`, you must also define the
``Meta.fields`` attribute (or the ``Meta.exclude`` attribute). However,
``ModelAdmin`` ignores this value, overriding it with the
:attr:`ModelAdmin.list_editable` attribute. The easiest solution is to
omit the ``Meta.model`` attribute, since ``ModelAdmin`` will provide the
correct model to use.
.. method:: ModelAdmin.get_changelist_formset(request, **kwargs)
Returns a :ref:`ModelFormSet <model-formsets>` class for use on the
changelist page if :attr:`~ModelAdmin.list_editable` is used. To use a
custom formset, for example::
from django.forms import BaseModelFormSet
class MyAdminFormSet(BaseModelFormSet):
pass
class MyModelAdmin(admin.ModelAdmin):
def get_changelist_formset(self, request, **kwargs):
kwargs['formset'] = MyAdminFormSet
return super().get_changelist_formset(request, **kwargs)
.. method:: ModelAdmin.lookup_allowed(lookup, value)
The objects in the changelist page can be filtered with lookups from the
URL's query string. This is how :attr:`list_filter` works, for example. The
lookups are similar to what's used in :meth:`.QuerySet.filter` (e.g.
``user__email=user@example.com``). Since the lookups in the query string
can be manipulated by the user, they must be sanitized to prevent
unauthorized data exposure.
The ``lookup_allowed()`` method is given a lookup path from the query string
(e.g. ``'user__email'``) and the corresponding value
(e.g. ``'user@example.com'``), and returns a boolean indicating whether
filtering the changelist's ``QuerySet`` using the parameters is permitted.
If ``lookup_allowed()`` returns ``False``, ``DisallowedModelAdminLookup``
(subclass of :exc:`~django.core.exceptions.SuspiciousOperation`) is raised.
By default, ``lookup_allowed()`` allows access to a model's local fields,
field paths used in :attr:`~ModelAdmin.list_filter` (but not paths from
:meth:`~ModelAdmin.get_list_filter`), and lookups required for
:attr:`~django.db.models.ForeignKey.limit_choices_to` to function
correctly in :attr:`~django.contrib.admin.ModelAdmin.raw_id_fields`.
Override this method to customize the lookups permitted for your
:class:`~django.contrib.admin.ModelAdmin` subclass.
.. method:: ModelAdmin.has_view_permission(request, obj=None)
Should return ``True`` if viewing ``obj`` is permitted, ``False`` otherwise.
If obj is ``None``, should return ``True`` or ``False`` to indicate whether
viewing of objects of this type is permitted in general (e.g., ``False``
will be interpreted as meaning that the current user is not permitted to
view any object of this type).
The default implementation returns ``True`` if the user has either the
"change" or "view" permission.
.. method:: ModelAdmin.has_add_permission(request)
Should return ``True`` if adding an object is permitted, ``False``
otherwise.
.. method:: ModelAdmin.has_change_permission(request, obj=None)
Should return ``True`` if editing ``obj`` is permitted, ``False``
otherwise. If ``obj`` is ``None``, should return ``True`` or ``False`` to
indicate whether editing of objects of this type is permitted in general
(e.g., ``False`` will be interpreted as meaning that the current user is
not permitted to edit any object of this type).
.. method:: ModelAdmin.has_delete_permission(request, obj=None)
Should return ``True`` if deleting ``obj`` is permitted, ``False``
otherwise. If ``obj`` is ``None``, should return ``True`` or ``False`` to
indicate whether deleting objects of this type is permitted in general
(e.g., ``False`` will be interpreted as meaning that the current user is
not permitted to delete any object of this type).
.. method:: ModelAdmin.has_module_permission(request)
Should return ``True`` if displaying the module on the admin index page and
accessing the module's index page is permitted, ``False`` otherwise.
Uses :meth:`User.has_module_perms()
<django.contrib.auth.models.User.has_module_perms>` by default. Overriding
it does not restrict access to the view, add, change, or delete views,
:meth:`~ModelAdmin.has_view_permission`,
:meth:`~ModelAdmin.has_add_permission`,
:meth:`~ModelAdmin.has_change_permission`, and
:meth:`~ModelAdmin.has_delete_permission` should be used for that.
.. method:: ModelAdmin.get_queryset(request)
The ``get_queryset`` method on a ``ModelAdmin`` returns a
:class:`~django.db.models.query.QuerySet` of all model instances that
can be edited by the admin site. One use case for overriding this method
is to show objects owned by the logged-in user::
class MyModelAdmin(admin.ModelAdmin):
def get_queryset(self, request):
qs = super().get_queryset(request)
if request.user.is_superuser:
return qs
return qs.filter(author=request.user)
.. method:: ModelAdmin.message_user(request, message, level=messages.INFO, extra_tags='', fail_silently=False)
Sends a message to the user using the :mod:`django.contrib.messages`
backend. See the :ref:`custom ModelAdmin example <custom-admin-action>`.
Keyword arguments allow you to change the message level, add extra CSS
tags, or fail silently if the ``contrib.messages`` framework is not
installed. These keyword arguments match those for
:func:`django.contrib.messages.add_message`, see that function's
documentation for more details. One difference is that the level may be
passed as a string label in addition to integer/constant.
.. method:: ModelAdmin.get_paginator(request, queryset, per_page, orphans=0, allow_empty_first_page=True)
Returns an instance of the paginator to use for this view. By default,
instantiates an instance of :attr:`paginator`.
.. method:: ModelAdmin.response_add(request, obj, post_url_continue=None)
Determines the :class:`~django.http.HttpResponse` for the
:meth:`add_view` stage.
``response_add`` is called after the admin form is submitted and
just after the object and all the related instances have
been created and saved. You can override it to change the default behavior
after the object has been created.
.. method:: ModelAdmin.response_change(request, obj)
Determines the :class:`~django.http.HttpResponse` for the
:meth:`change_view` stage.
``response_change`` is called after the admin form is submitted and
just after the object and all the related instances have
been saved. You can override it to change the default
behavior after the object has been changed.
.. method:: ModelAdmin.response_delete(request, obj_display, obj_id)
Determines the :class:`~django.http.HttpResponse` for the
:meth:`delete_view` stage.
``response_delete`` is called after the object has been
deleted. You can override it to change the default
behavior after the object has been deleted.
``obj_display`` is a string with the name of the deleted
object.
``obj_id`` is the serialized identifier used to retrieve the object to be
deleted.
.. method:: ModelAdmin.get_changeform_initial_data(request)
A hook for the initial data on admin change forms. By default, fields are
given initial values from ``GET`` parameters. For instance,
``?name=initial_value`` will set the ``name`` field's initial value to be
``initial_value``.
This method should return a dictionary in the form
``{'fieldname': 'fieldval'}``::
def get_changeform_initial_data(self, request):
return {'name': 'custom_initial_value'}
.. method:: ModelAdmin.get_deleted_objects(objs, request)
A hook for customizing the deletion process of the :meth:`delete_view` and
the "delete selected" :doc:`action <actions>`.
The ``objs`` argument is a homogeneous iterable of objects (a ``QuerySet``
or a list of model instances) to be deleted, and ``request`` is the
:class:`~django.http.HttpRequest`.
This method must return a 4-tuple of
``(deleted_objects, model_count, perms_needed, protected)``.
``deleted_objects`` is a list of strings representing all the objects that
will be deleted. If there are any related objects to be deleted, the list
is nested and includes those related objects. The list is formatted in the
template using the :tfilter:`unordered_list` filter.
``model_count`` is a dictionary mapping each model's
:attr:`~django.db.models.Options.verbose_name_plural` to the number of
objects that will be deleted.
``perms_needed`` is a set of :attr:`~django.db.models.Options.verbose_name`\s
of the models that the user doesn't have permission to delete.
``protected`` is a list of strings representing of all the protected
related objects that can't be deleted. The list is displayed in the
template.
Other methods
~~~~~~~~~~~~~
.. method:: ModelAdmin.add_view(request, form_url='', extra_context=None)
Django view for the model instance addition page. See note below.
.. method:: ModelAdmin.change_view(request, object_id, form_url='', extra_context=None)
Django view for the model instance editing page. See note below.
.. method:: ModelAdmin.changelist_view(request, extra_context=None)
Django view for the model instances change list/actions page. See note
below.
.. method:: ModelAdmin.delete_view(request, object_id, extra_context=None)
Django view for the model instance(s) deletion confirmation page. See note
below.
.. method:: ModelAdmin.history_view(request, object_id, extra_context=None)
Django view for the page that shows the modification history for a given
model instance.
Unlike the hook-type ``ModelAdmin`` methods detailed in the previous section,
these five methods are in reality designed to be invoked as Django views from
the admin application URL dispatching handler to render the pages that deal
with model instances CRUD operations. As a result, completely overriding these
methods will significantly change the behavior of the admin application.
One common reason for overriding these methods is to augment the context data
that is provided to the template that renders the view. In the following
example, the change view is overridden so that the rendered template is
provided some extra mapping data that would not otherwise be available::
class MyModelAdmin(admin.ModelAdmin):
# A template for a very customized change view:
change_form_template = 'admin/myapp/extras/openstreetmap_change_form.html'
def get_osm_info(self):
# ...
pass
def change_view(self, request, object_id, form_url='', extra_context=None):
extra_context = extra_context or {}
extra_context['osm_data'] = self.get_osm_info()
return super().change_view(
request, object_id, form_url, extra_context=extra_context,
)
These views return :class:`~django.template.response.TemplateResponse`
instances which allow you to easily customize the response data before
rendering. For more details, see the :doc:`TemplateResponse documentation
</ref/template-response>`.
.. _modeladmin-asset-definitions:
``ModelAdmin`` asset definitions
--------------------------------
There are times where you would like add a bit of CSS and/or JavaScript to
the add/change views. This can be accomplished by using a ``Media`` inner class
on your ``ModelAdmin``::
class ArticleAdmin(admin.ModelAdmin):
class Media:
css = {
"all": ("my_styles.css",)
}
js = ("my_code.js",)
The :doc:`staticfiles app </ref/contrib/staticfiles>` prepends
:setting:`STATIC_URL` (or :setting:`MEDIA_URL` if :setting:`STATIC_URL` is
``None``) to any asset paths. The same rules apply as :ref:`regular asset
definitions on forms <form-asset-paths>`.
.. _contrib-admin-jquery:
jQuery
~~~~~~
Django admin JavaScript makes use of the `jQuery`_ library.
To avoid conflicts with user-supplied scripts or libraries, Django's jQuery
(version 3.4.1) is namespaced as ``django.jQuery``. If you want to use jQuery
in your own admin JavaScript without including a second copy, you can use the
``django.jQuery`` object on changelist and add/edit views.
.. versionchanged:: 3.0
jQuery was upgraded from 3.3.1 to 3.4.1.
The :class:`ModelAdmin` class requires jQuery by default, so there is no need
to add jQuery to your ``ModelAdmin``’s list of media resources unless you have
a specific need. For example, if you require the jQuery library to be in the
global namespace (for example when using third-party jQuery plugins) or if you
need a newer version of jQuery, you will have to include your own copy.
Django provides both uncompressed and 'minified' versions of jQuery, as
``jquery.js`` and ``jquery.min.js`` respectively.
:class:`ModelAdmin` and :class:`InlineModelAdmin` have a ``media`` property
that returns a list of ``Media`` objects which store paths to the JavaScript
files for the forms and/or formsets. If :setting:`DEBUG` is ``True`` it will
return the uncompressed versions of the various JavaScript files, including
``jquery.js``; if not, it will return the 'minified' versions.
.. _jQuery: https://jquery.com
.. _admin-custom-validation:
Adding custom validation to the admin
-------------------------------------
You can also add custom validation of data in the admin. The automatic admin
interface reuses :mod:`django.forms`, and the ``ModelAdmin`` class gives you
the ability define your own form::
class ArticleAdmin(admin.ModelAdmin):
form = MyArticleAdminForm
``MyArticleAdminForm`` can be defined anywhere as long as you import where
needed. Now within your form you can add your own custom validation for
any field::
class MyArticleAdminForm(forms.ModelForm):
def clean_name(self):
# do something that validates your data
return self.cleaned_data["name"]
It is important you use a ``ModelForm`` here otherwise things can break. See
the :doc:`forms </ref/forms/index>` documentation on :doc:`custom validation
</ref/forms/validation>` and, more specifically, the
:ref:`model form validation notes <overriding-modelform-clean-method>` for more
information.
.. _admin-inlines:
``InlineModelAdmin`` objects
============================
.. class:: InlineModelAdmin
.. class:: TabularInline
.. class:: StackedInline
The admin interface has the ability to edit models on the same page as a
parent model. These are called inlines. Suppose you have these two models::
from django.db import models
class Author(models.Model):
name = models.CharField(max_length=100)
class Book(models.Model):
author = models.ForeignKey(Author, on_delete=models.CASCADE)
title = models.CharField(max_length=100)
You can edit the books authored by an author on the author page. You add
inlines to a model by specifying them in a ``ModelAdmin.inlines``::
from django.contrib import admin
class BookInline(admin.TabularInline):
model = Book
class AuthorAdmin(admin.ModelAdmin):
inlines = [
BookInline,
]
Django provides two subclasses of ``InlineModelAdmin`` and they are:
* :class:`~django.contrib.admin.TabularInline`
* :class:`~django.contrib.admin.StackedInline`
The difference between these two is merely the template used to render
them.
``InlineModelAdmin`` options
-----------------------------
``InlineModelAdmin`` shares many of the same features as ``ModelAdmin``, and
adds some of its own (the shared features are actually defined in the
``BaseModelAdmin`` superclass). The shared features are:
- :attr:`~InlineModelAdmin.form`
- :attr:`~ModelAdmin.fieldsets`
- :attr:`~ModelAdmin.fields`
- :attr:`~ModelAdmin.formfield_overrides`
- :attr:`~ModelAdmin.exclude`
- :attr:`~ModelAdmin.filter_horizontal`
- :attr:`~ModelAdmin.filter_vertical`
- :attr:`~ModelAdmin.ordering`
- :attr:`~ModelAdmin.prepopulated_fields`
- :meth:`~ModelAdmin.get_fieldsets`
- :meth:`~ModelAdmin.get_queryset`
- :attr:`~ModelAdmin.radio_fields`
- :attr:`~ModelAdmin.readonly_fields`
- :attr:`~InlineModelAdmin.raw_id_fields`
- :meth:`~ModelAdmin.formfield_for_choice_field`
- :meth:`~ModelAdmin.formfield_for_foreignkey`
- :meth:`~ModelAdmin.formfield_for_manytomany`
- :meth:`~ModelAdmin.has_module_permission`
The ``InlineModelAdmin`` class adds or customizes:
.. attribute:: InlineModelAdmin.model
The model which the inline is using. This is required.
.. attribute:: InlineModelAdmin.fk_name
The name of the foreign key on the model. In most cases this will be dealt
with automatically, but ``fk_name`` must be specified explicitly if there
are more than one foreign key to the same parent model.
.. attribute:: InlineModelAdmin.formset
This defaults to :class:`~django.forms.models.BaseInlineFormSet`. Using
your own formset can give you many possibilities of customization. Inlines
are built around :ref:`model formsets <model-formsets>`.
.. attribute:: InlineModelAdmin.form
The value for ``form`` defaults to ``ModelForm``. This is what is passed
through to :func:`~django.forms.models.inlineformset_factory` when
creating the formset for this inline.
.. warning::
When writing custom validation for ``InlineModelAdmin`` forms, be cautious
of writing validation that relies on features of the parent model. If the
parent model fails to validate, it may be left in an inconsistent state as
described in the warning in :ref:`validation-on-modelform`.
.. attribute:: InlineModelAdmin.classes
A list or tuple containing extra CSS classes to apply to the fieldset that
is rendered for the inlines. Defaults to ``None``. As with classes
configured in :attr:`~ModelAdmin.fieldsets`, inlines with a ``collapse``
class will be initially collapsed and their header will have a small "show"
link.
.. attribute:: InlineModelAdmin.extra
This controls the number of extra forms the formset will display in
addition to the initial forms. See the
:doc:`formsets documentation </topics/forms/formsets>` for more
information.
For users with JavaScript-enabled browsers, an "Add another" link is
provided to enable any number of additional inlines to be added in addition
to those provided as a result of the ``extra`` argument.
The dynamic link will not appear if the number of currently displayed forms
exceeds ``max_num``, or if the user does not have JavaScript enabled.
:meth:`InlineModelAdmin.get_extra` also allows you to customize the number
of extra forms.
.. attribute:: InlineModelAdmin.max_num
This controls the maximum number of forms to show in the inline. This
doesn't directly correlate to the number of objects, but can if the value
is small enough. See :ref:`model-formsets-max-num` for more information.
:meth:`InlineModelAdmin.get_max_num` also allows you to customize the
maximum number of extra forms.
.. attribute:: InlineModelAdmin.min_num
This controls the minimum number of forms to show in the inline.
See :func:`~django.forms.models.modelformset_factory` for more information.
:meth:`InlineModelAdmin.get_min_num` also allows you to customize the
minimum number of displayed forms.
.. attribute:: InlineModelAdmin.raw_id_fields
By default, Django's admin uses a select-box interface (<select>) for
fields that are ``ForeignKey``. Sometimes you don't want to incur the
overhead of having to select all the related instances to display in the
drop-down.
``raw_id_fields`` is a list of fields you would like to change into an
``Input`` widget for either a ``ForeignKey`` or ``ManyToManyField``::
class BookInline(admin.TabularInline):
model = Book
raw_id_fields = ("pages",)
.. attribute:: InlineModelAdmin.template
The template used to render the inline on the page.
.. attribute:: InlineModelAdmin.verbose_name
An override to the ``verbose_name`` found in the model's inner ``Meta``
class.
.. attribute:: InlineModelAdmin.verbose_name_plural
An override to the ``verbose_name_plural`` found in the model's inner
``Meta`` class.
.. attribute:: InlineModelAdmin.can_delete
Specifies whether or not inline objects can be deleted in the inline.
Defaults to ``True``.
.. attribute:: InlineModelAdmin.show_change_link
Specifies whether or not inline objects that can be changed in the
admin have a link to the change form. Defaults to ``False``.
.. method:: InlineModelAdmin.get_formset(request, obj=None, **kwargs)
Returns a :class:`~django.forms.models.BaseInlineFormSet` class for use in
admin add/change views. ``obj`` is the parent object being edited or
``None`` when adding a new parent. See the example for
:class:`ModelAdmin.get_formsets_with_inlines`.
.. method:: InlineModelAdmin.get_extra(request, obj=None, **kwargs)
Returns the number of extra inline forms to use. By default, returns the
:attr:`InlineModelAdmin.extra` attribute.
Override this method to programmatically determine the number of extra
inline forms. For example, this may be based on the model instance
(passed as the keyword argument ``obj``)::
class BinaryTreeAdmin(admin.TabularInline):
model = BinaryTree
def get_extra(self, request, obj=None, **kwargs):
extra = 2
if obj:
return extra - obj.binarytree_set.count()
return extra
.. method:: InlineModelAdmin.get_max_num(request, obj=None, **kwargs)
Returns the maximum number of extra inline forms to use. By default,
returns the :attr:`InlineModelAdmin.max_num` attribute.
Override this method to programmatically determine the maximum number of
inline forms. For example, this may be based on the model instance
(passed as the keyword argument ``obj``)::
class BinaryTreeAdmin(admin.TabularInline):
model = BinaryTree
def get_max_num(self, request, obj=None, **kwargs):
max_num = 10
if obj and obj.parent:
return max_num - 5
return max_num
.. method:: InlineModelAdmin.get_min_num(request, obj=None, **kwargs)
Returns the minimum number of inline forms to use. By default,
returns the :attr:`InlineModelAdmin.min_num` attribute.
Override this method to programmatically determine the minimum number of
inline forms. For example, this may be based on the model instance
(passed as the keyword argument ``obj``).
.. method:: InlineModelAdmin.has_add_permission(request, obj)
Should return ``True`` if adding an inline object is permitted, ``False``
otherwise. ``obj`` is the parent object being edited or ``None`` when
adding a new parent.
.. method:: InlineModelAdmin.has_change_permission(request, obj=None)
Should return ``True`` if editing an inline object is permitted, ``False``
otherwise. ``obj`` is the parent object being edited.
.. method:: InlineModelAdmin.has_delete_permission(request, obj=None)
Should return ``True`` if deleting an inline object is permitted, ``False``
otherwise. ``obj`` is the parent object being edited.
.. note::
The ``obj`` argument passed to ``InlineModelAdmin`` methods is the parent
object being edited or ``None`` when adding a new parent.
Working with a model with two or more foreign keys to the same parent model
---------------------------------------------------------------------------
It is sometimes possible to have more than one foreign key to the same model.
Take this model for instance::
from django.db import models
class Friendship(models.Model):
to_person = models.ForeignKey(Person, on_delete=models.CASCADE, related_name="friends")
from_person = models.ForeignKey(Person, on_delete=models.CASCADE, related_name="from_friends")
If you wanted to display an inline on the ``Person`` admin add/change pages
you need to explicitly define the foreign key since it is unable to do so
automatically::
from django.contrib import admin
from myapp.models import Friendship
class FriendshipInline(admin.TabularInline):
model = Friendship
fk_name = "to_person"
class PersonAdmin(admin.ModelAdmin):
inlines = [
FriendshipInline,
]
Working with many-to-many models
--------------------------------
By default, admin widgets for many-to-many relations will be displayed
on whichever model contains the actual reference to the
:class:`~django.db.models.ManyToManyField`. Depending on your ``ModelAdmin``
definition, each many-to-many field in your model will be represented by a
standard HTML ``<select multiple>``, a horizontal or vertical filter, or a
``raw_id_admin`` widget. However, it is also possible to replace these
widgets with inlines.
Suppose we have the following models::
from django.db import models
class Person(models.Model):
name = models.CharField(max_length=128)
class Group(models.Model):
name = models.CharField(max_length=128)
members = models.ManyToManyField(Person, related_name='groups')
If you want to display many-to-many relations using an inline, you can do
so by defining an ``InlineModelAdmin`` object for the relationship::
from django.contrib import admin
class MembershipInline(admin.TabularInline):
model = Group.members.through
class PersonAdmin(admin.ModelAdmin):
inlines = [
MembershipInline,
]
class GroupAdmin(admin.ModelAdmin):
inlines = [
MembershipInline,
]
exclude = ('members',)
There are two features worth noting in this example.
Firstly - the ``MembershipInline`` class references ``Group.members.through``.
The ``through`` attribute is a reference to the model that manages the
many-to-many relation. This model is automatically created by Django when you
define a many-to-many field.
Secondly, the ``GroupAdmin`` must manually exclude the ``members`` field.
Django displays an admin widget for a many-to-many field on the model that
defines the relation (in this case, ``Group``). If you want to use an inline
model to represent the many-to-many relationship, you must tell Django's admin
to *not* display this widget - otherwise you will end up with two widgets on
your admin page for managing the relation.
Note that when using this technique the
:data:`~django.db.models.signals.m2m_changed` signals aren't triggered. This
is because as far as the admin is concerned, ``through`` is just a model with
two foreign key fields rather than a many-to-many relation.
In all other respects, the ``InlineModelAdmin`` is exactly the same as any
other. You can customize the appearance using any of the normal
``ModelAdmin`` properties.
Working with many-to-many intermediary models
---------------------------------------------
When you specify an intermediary model using the ``through`` argument to a
:class:`~django.db.models.ManyToManyField`, the admin will not display a
widget by default. This is because each instance of that intermediary model
requires more information than could be displayed in a single widget, and the
layout required for multiple widgets will vary depending on the intermediate
model.
However, we still want to be able to edit that information inline. Fortunately,
we can do this with inline admin models. Suppose we have the following models::
from django.db import models
class Person(models.Model):
name = models.CharField(max_length=128)
class Group(models.Model):
name = models.CharField(max_length=128)
members = models.ManyToManyField(Person, through='Membership')
class Membership(models.Model):
person = models.ForeignKey(Person, on_delete=models.CASCADE)
group = models.ForeignKey(Group, on_delete=models.CASCADE)
date_joined = models.DateField()
invite_reason = models.CharField(max_length=64)
The first step in displaying this intermediate model in the admin is to
define an inline class for the ``Membership`` model::
class MembershipInline(admin.TabularInline):
model = Membership
extra = 1
This example uses the default ``InlineModelAdmin`` values for the
``Membership`` model, and limits the extra add forms to one. This could be
customized using any of the options available to ``InlineModelAdmin`` classes.
Now create admin views for the ``Person`` and ``Group`` models::
class PersonAdmin(admin.ModelAdmin):
inlines = (MembershipInline,)
class GroupAdmin(admin.ModelAdmin):
inlines = (MembershipInline,)
Finally, register your ``Person`` and ``Group`` models with the admin site::
admin.site.register(Person, PersonAdmin)
admin.site.register(Group, GroupAdmin)
Now your admin site is set up to edit ``Membership`` objects inline from
either the ``Person`` or the ``Group`` detail pages.
.. _using-generic-relations-as-an-inline:
Using generic relations as an inline
------------------------------------
It is possible to use an inline with generically related objects. Let's say
you have the following models::
from django.contrib.contenttypes.fields import GenericForeignKey
from django.db import models
class Image(models.Model):
image = models.ImageField(upload_to="images")
content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE)
object_id = models.PositiveIntegerField()
content_object = GenericForeignKey("content_type", "object_id")
class Product(models.Model):
name = models.CharField(max_length=100)
If you want to allow editing and creating an ``Image`` instance on the
``Product``, add/change views you can use
:class:`~django.contrib.contenttypes.admin.GenericTabularInline`
or :class:`~django.contrib.contenttypes.admin.GenericStackedInline` (both
subclasses of :class:`~django.contrib.contenttypes.admin.GenericInlineModelAdmin`)
provided by :mod:`~django.contrib.contenttypes.admin`. They implement tabular
and stacked visual layouts for the forms representing the inline objects,
respectively, just like their non-generic counterparts. They behave just like
any other inline. In your ``admin.py`` for this example app::
from django.contrib import admin
from django.contrib.contenttypes.admin import GenericTabularInline
from myproject.myapp.models import Image, Product
class ImageInline(GenericTabularInline):
model = Image
class ProductAdmin(admin.ModelAdmin):
inlines = [
ImageInline,
]
admin.site.register(Product, ProductAdmin)
See the :doc:`contenttypes documentation </ref/contrib/contenttypes>` for more
specific information.
.. _admin-overriding-templates:
Overriding admin templates
==========================
You can override many of the templates which the admin module uses to generate
the various pages of an admin site. You can even override a few of these
templates for a specific app, or a specific model.
Set up your projects admin template directories
-----------------------------------------------
The admin template files are located in the ``contrib/admin/templates/admin``
directory.
In order to override one or more of them, first create an ``admin`` directory
in your project's ``templates`` directory. This can be any of the directories
you specified in the :setting:`DIRS <TEMPLATES-DIRS>` option of the
``DjangoTemplates`` backend in the :setting:`TEMPLATES` setting. If you have
customized the ``'loaders'`` option, be sure
``'django.template.loaders.filesystem.Loader'`` appears before
``'django.template.loaders.app_directories.Loader'`` so that your custom
templates will be found by the template loading system before those that are
included with :mod:`django.contrib.admin`.
Within this ``admin`` directory, create sub-directories named after your app.
Within these app subdirectories create sub-directories named after your models.
Note, that the admin app will lowercase the model name when looking for the
directory, so make sure you name the directory in all lowercase if you are
going to run your app on a case-sensitive filesystem.
To override an admin template for a specific app, copy and edit the template
from the ``django/contrib/admin/templates/admin`` directory, and save it to one
of the directories you just created.
For example, if we wanted to add a tool to the change list view for all the
models in an app named ``my_app``, we would copy
``contrib/admin/templates/admin/change_list.html`` to the
``templates/admin/my_app/`` directory of our project, and make any necessary
changes.
If we wanted to add a tool to the change list view for only a specific model
named 'Page', we would copy that same file to the
``templates/admin/my_app/page`` directory of our project.
Overriding vs. replacing an admin template
------------------------------------------
Because of the modular design of the admin templates, it is usually neither
necessary nor advisable to replace an entire template. It is almost always
better to override only the section of the template which you need to change.
To continue the example above, we want to add a new link next to the
``History`` tool for the ``Page`` model. After looking at ``change_form.html``
we determine that we only need to override the ``object-tools-items`` block.
Therefore here is our new ``change_form.html`` :
.. code-block:: html+django
{% extends "admin/change_form.html" %}
{% load i18n admin_urls %}
{% block object-tools-items %}
<li>
<a href="{% url opts|admin_urlname:'history' original.pk|admin_urlquote %}" class="historylink">{% trans "History" %}</a>
</li>
<li>
<a href="mylink/" class="historylink">My Link</a>
</li>
{% if has_absolute_url %}
<li>
<a href="{% url 'admin:view_on_site' content_type_id original.pk %}" class="viewsitelink">{% trans "View on site" %}</a>
</li>
{% endif %}
{% endblock %}
And that's it! If we placed this file in the ``templates/admin/my_app``
directory, our link would appear on the change form for all models within
my_app.
.. _admin-templates-overridden-per-app-or-model:
Templates which may be overridden per app or model
--------------------------------------------------
Not every template in ``contrib/admin/templates/admin`` may be overridden per
app or per model. The following can:
* ``actions.html``
* ``app_index.html``
* ``change_form.html``
* ``change_form_object_tools.html``
* ``change_list.html``
* ``change_list_object_tools.html``
* ``change_list_results.html``
* ``date_hierarchy.html``
* ``delete_confirmation.html``
* ``object_history.html``
* ``pagination.html``
* ``popup_response.html``
* ``prepopulated_fields_js.html``
* ``search_form.html``
* ``submit_line.html``
For those templates that cannot be overridden in this way, you may still
override them for your entire project by placing the new version in your
``templates/admin`` directory. This is particularly useful to create custom 404
and 500 pages.
.. note::
Some of the admin templates, such as ``change_list_results.html`` are used
to render custom inclusion tags. These may be overridden, but in such cases
you are probably better off creating your own version of the tag in
question and giving it a different name. That way you can use it
selectively.
Root and login templates
------------------------
If you wish to change the index, login or logout templates, you are better off
creating your own ``AdminSite`` instance (see below), and changing the
:attr:`AdminSite.index_template` , :attr:`AdminSite.login_template` or
:attr:`AdminSite.logout_template` properties.
``AdminSite`` objects
=====================
.. class:: AdminSite(name='admin')
A Django administrative site is represented by an instance of
``django.contrib.admin.sites.AdminSite``; by default, an instance of
this class is created as ``django.contrib.admin.site`` and you can
register your models and ``ModelAdmin`` instances with it.
If you want to customize the default admin site, you can :ref:`override it
<overriding-default-admin-site>`.
When constructing an instance of an ``AdminSite``, you can provide
a unique instance name using the ``name`` argument to the constructor. This
instance name is used to identify the instance, especially when
:ref:`reversing admin URLs <admin-reverse-urls>`. If no instance name is
provided, a default instance name of ``admin`` will be used.
See :ref:`customizing-adminsite` for an example of customizing the
:class:`AdminSite` class.
``AdminSite`` attributes
------------------------
Templates can override or extend base admin templates as described in
:ref:`admin-overriding-templates`.
.. attribute:: AdminSite.site_header
The text to put at the top of each admin page, as an ``<h1>`` (a string).
By default, this is "Django administration".
.. attribute:: AdminSite.site_title
The text to put at the end of each admin page's ``<title>`` (a string). By
default, this is "Django site admin".
.. attribute:: AdminSite.site_url
The URL for the "View site" link at the top of each admin page. By default,
``site_url`` is ``/``. Set it to ``None`` to remove the link.
For sites running on a subpath, the :meth:`each_context` method checks if
the current request has ``request.META['SCRIPT_NAME']`` set and uses that
value if ``site_url`` isn't set to something other than ``/``.
.. attribute:: AdminSite.index_title
The text to put at the top of the admin index page (a string). By default,
this is "Site administration".
.. attribute:: AdminSite.index_template
Path to a custom template that will be used by the admin site main index
view.
.. attribute:: AdminSite.app_index_template
Path to a custom template that will be used by the admin site app index view.
.. attribute:: AdminSite.empty_value_display
The string to use for displaying empty values in the admin site's change
list. Defaults to a dash. The value can also be overridden on a per
``ModelAdmin`` basis and on a custom field within a ``ModelAdmin`` by
setting an ``empty_value_display`` attribute on the field. See
:attr:`ModelAdmin.empty_value_display` for examples.
.. attribute:: AdminSite.login_template
Path to a custom template that will be used by the admin site login view.
.. attribute:: AdminSite.login_form
Subclass of :class:`~django.contrib.auth.forms.AuthenticationForm` that
will be used by the admin site login view.
.. attribute:: AdminSite.logout_template
Path to a custom template that will be used by the admin site logout view.
.. attribute:: AdminSite.password_change_template
Path to a custom template that will be used by the admin site password
change view.
.. attribute:: AdminSite.password_change_done_template
Path to a custom template that will be used by the admin site password
change done view.
``AdminSite`` methods
---------------------
.. method:: AdminSite.each_context(request)
Returns a dictionary of variables to put in the template context for
every page in the admin site.
Includes the following variables and values by default:
* ``site_header``: :attr:`AdminSite.site_header`
* ``site_title``: :attr:`AdminSite.site_title`
* ``site_url``: :attr:`AdminSite.site_url`
* ``has_permission``: :meth:`AdminSite.has_permission`
* ``available_apps``: a list of applications from the :doc:`application registry
</ref/applications/>` available for the current user. Each entry in the
list is a dict representing an application with the following keys:
* ``app_label``: the application label
* ``app_url``: the URL of the application index in the admin
* ``has_module_perms``: a boolean indicating if displaying and accessing of
the module's index page is permitted for the current user
* ``models``: a list of the models available in the application
Each model is a dict with the following keys:
* ``object_name``: class name of the model
* ``name``: plural name of the model
* ``perms``: a ``dict`` tracking ``add``, ``change``, ``delete``, and
``view`` permissions
* ``admin_url``: admin changelist URL for the model
* ``add_url``: admin URL to add a new model instance
.. method:: AdminSite.has_permission(request)
Returns ``True`` if the user for the given ``HttpRequest`` has permission
to view at least one page in the admin site. Defaults to requiring both
:attr:`User.is_active <django.contrib.auth.models.User.is_active>` and
:attr:`User.is_staff <django.contrib.auth.models.User.is_staff>` to be
``True``.
.. method:: AdminSite.register(model_or_iterable, admin_class=None, **options)
Registers the given model class (or iterable of classes) with the given
``admin_class``. ``admin_class`` defaults to
:class:`~django.contrib.admin.ModelAdmin` (the default admin options). If
keyword arguments are given -- e.g. ``list_display`` -- they'll be applied
as options to the admin class.
Raises :class:`~django.core.exceptions.ImproperlyConfigured` if a model is
abstract. and ``django.contrib.admin.sites.AlreadyRegistered`` if a model
is already registered.
.. _hooking-adminsite-to-urlconf:
Hooking ``AdminSite`` instances into your URLconf
-------------------------------------------------
The last step in setting up the Django admin is to hook your ``AdminSite``
instance into your URLconf. Do this by pointing a given URL at the
``AdminSite.urls`` method. It is not necessary to use
:func:`~django.urls.include()`.
In this example, we register the default ``AdminSite`` instance
``django.contrib.admin.site`` at the URL ``/admin/`` ::
# urls.py
from django.contrib import admin
from django.urls import path
urlpatterns = [
path('admin/', admin.site.urls),
]
.. _customizing-adminsite:
Customizing the :class:`AdminSite` class
----------------------------------------
If you'd like to set up your own admin site with custom behavior, you're free
to subclass ``AdminSite`` and override or add anything you like. Then, create
an instance of your ``AdminSite`` subclass (the same way you'd instantiate any
other Python class) and register your models and ``ModelAdmin`` subclasses with
it instead of with the default site. Finally, update :file:`myproject/urls.py`
to reference your :class:`AdminSite` subclass.
.. code-block:: python
:caption: myapp/admin.py
from django.contrib.admin import AdminSite
from .models import MyModel
class MyAdminSite(AdminSite):
site_header = 'Monty Python administration'
admin_site = MyAdminSite(name='myadmin')
admin_site.register(MyModel)
.. code-block:: python
:caption: myproject/urls.py
from django.urls import path
from myapp.admin import admin_site
urlpatterns = [
path('myadmin/', admin_site.urls),
]
Note that you may not want autodiscovery of ``admin`` modules when using your
own ``AdminSite`` instance since you will likely be importing all the per-app
``admin`` modules in your ``myproject.admin`` module. This means you need to
put ``'django.contrib.admin.apps.SimpleAdminConfig'`` instead of
``'django.contrib.admin'`` in your :setting:`INSTALLED_APPS` setting.
.. _overriding-default-admin-site:
Overriding the default admin site
---------------------------------
You can override the default ``django.contrib.admin.site`` by setting the
:attr:`~.SimpleAdminConfig.default_site` attribute of a custom ``AppConfig``
to the dotted import path of either a ``AdminSite`` subclass or a callable that
returns a site instance.
.. code-block:: python
:caption: myproject/admin.py
from django.contrib import admin
class MyAdminSite(admin.AdminSite):
...
.. code-block:: python
:caption: myproject/apps.py
from django.contrib.admin.apps import AdminConfig
class MyAdminConfig(AdminConfig):
default_site = 'myproject.admin.MyAdminSite'
.. code-block:: python
:caption: myproject/settings.py
INSTALLED_APPS = [
...
'myproject.apps.MyAdminConfig', # replaces 'django.contrib.admin'
...
]
.. _multiple-admin-sites:
Multiple admin sites in the same URLconf
----------------------------------------
You can create multiple instances of the admin site on the same Django-powered
website. Create multiple instances of ``AdminSite`` and place each one at a
different URL.
In this example, the URLs ``/basic-admin/`` and ``/advanced-admin/`` feature
separate versions of the admin site -- using the ``AdminSite`` instances
``myproject.admin.basic_site`` and ``myproject.admin.advanced_site``,
respectively::
# urls.py
from django.urls import path
from myproject.admin import advanced_site, basic_site
urlpatterns = [
path('basic-admin/', basic_site.urls),
path('advanced-admin/', advanced_site.urls),
]
``AdminSite`` instances take a single argument to their constructor, their
name, which can be anything you like. This argument becomes the prefix to the
URL names for the purposes of :ref:`reversing them<admin-reverse-urls>`. This
is only necessary if you are using more than one ``AdminSite``.
Adding views to admin sites
---------------------------
Just like :class:`ModelAdmin`, :class:`AdminSite` provides a
:meth:`~django.contrib.admin.ModelAdmin.get_urls()` method
that can be overridden to define additional views for the site. To add
a new view to your admin site, extend the base
:meth:`~django.contrib.admin.ModelAdmin.get_urls()` method to include
a pattern for your new view.
.. note::
Any view you render that uses the admin templates, or extends the base
admin template, should set ``request.current_app`` before rendering the
template. It should be set to either ``self.name`` if your view is on an
``AdminSite`` or ``self.admin_site.name`` if your view is on a
``ModelAdmin``.
.. _auth_password_reset:
Adding a password reset feature
-------------------------------
You can add a password reset feature to the admin site by adding a few lines to
your URLconf. Specifically, add these four patterns::
from django.contrib.auth import views as auth_views
path(
'admin/password_reset/',
auth_views.PasswordResetView.as_view(),
name='admin_password_reset',
),
path(
'admin/password_reset/done/',
auth_views.PasswordResetDoneView.as_view(),
name='password_reset_done',
),
path(
'reset/<uidb64>/<token>/',
auth_views.PasswordResetConfirmView.as_view(),
name='password_reset_confirm',
),
path(
'reset/done/',
auth_views.PasswordResetCompleteView.as_view(),
name='password_reset_complete',
),
(This assumes you've added the admin at ``admin/`` and requires that you put
the URLs starting with ``^admin/`` before the line that includes the admin app
itself).
The presence of the ``admin_password_reset`` named URL will cause a "forgotten
your password?" link to appear on the default admin log-in page under the
password box.
``LogEntry`` objects
====================
.. class:: models.LogEntry
The ``LogEntry`` class tracks additions, changes, and deletions of objects
done through the admin interface.
.. currentmodule:: django.contrib.admin.models
``LogEntry`` attributes
-----------------------
.. attribute:: LogEntry.action_time
The date and time of the action.
.. attribute:: LogEntry.user
The user (an :setting:`AUTH_USER_MODEL` instance) who performed the
action.
.. attribute:: LogEntry.content_type
The :class:`~django.contrib.contenttypes.models.ContentType` of the
modified object.
.. attribute:: LogEntry.object_id
The textual representation of the modified object's primary key.
.. attribute:: LogEntry.object_repr
The object`s ``repr()`` after the modification.
.. attribute:: LogEntry.action_flag
The type of action logged: ``ADDITION``, ``CHANGE``, ``DELETION``.
For example, to get a list of all additions done through the admin::
from django.contrib.admin.models import ADDITION, LogEntry
LogEntry.objects.filter(action_flag=ADDITION)
.. attribute:: LogEntry.change_message
The detailed description of the modification. In the case of an edit, for
example, the message contains a list of the edited fields. The Django admin
site formats this content as a JSON structure, so that
:meth:`get_change_message` can recompose a message translated in the current
user language. Custom code might set this as a plain string though. You are
advised to use the :meth:`get_change_message` method to retrieve this value
instead of accessing it directly.
``LogEntry`` methods
--------------------
.. method:: LogEntry.get_edited_object()
A shortcut that returns the referenced object.
.. method:: LogEntry.get_change_message()
Formats and translates :attr:`change_message` into the current user
language. Messages created before Django 1.10 will always be displayed in
the language in which they were logged.
.. currentmodule:: django.contrib.admin
.. _admin-reverse-urls:
Reversing admin URLs
====================
When an :class:`AdminSite` is deployed, the views provided by that site are
accessible using Django's :ref:`URL reversing system <naming-url-patterns>`.
The :class:`AdminSite` provides the following named URL patterns:
========================= ======================== ==================================
Page URL name Parameters
========================= ======================== ==================================
Index ``index``
Login ``login``
Logout ``logout``
Password change ``password_change``
Password change done ``password_change_done``
i18n JavaScript ``jsi18n``
Application index page ``app_list`` ``app_label``
Redirect to object's page ``view_on_site`` ``content_type_id``, ``object_id``
========================= ======================== ==================================
Each :class:`ModelAdmin` instance provides an additional set of named URLs:
====================== =============================================== =============
Page URL name Parameters
====================== =============================================== =============
Changelist ``{{ app_label }}_{{ model_name }}_changelist``
Add ``{{ app_label }}_{{ model_name }}_add``
History ``{{ app_label }}_{{ model_name }}_history`` ``object_id``
Delete ``{{ app_label }}_{{ model_name }}_delete`` ``object_id``
Change ``{{ app_label }}_{{ model_name }}_change`` ``object_id``
====================== =============================================== =============
The ``UserAdmin`` provides a named URL:
====================== =============================================== =============
Page URL name Parameters
====================== =============================================== =============
Password change ``auth_user_password_change`` ``user_id``
====================== =============================================== =============
These named URLs are registered with the application namespace ``admin``, and
with an instance namespace corresponding to the name of the Site instance.
So - if you wanted to get a reference to the Change view for a particular
``Choice`` object (from the polls application) in the default admin, you would
call::
>>> from django.urls import reverse
>>> c = Choice.objects.get(...)
>>> change_url = reverse('admin:polls_choice_change', args=(c.id,))
This will find the first registered instance of the admin application
(whatever the instance name), and resolve to the view for changing
``poll.Choice`` instances in that instance.
If you want to find a URL in a specific admin instance, provide the name of
that instance as a ``current_app`` hint to the reverse call. For example,
if you specifically wanted the admin view from the admin instance named
``custom``, you would need to call::
>>> change_url = reverse('admin:polls_choice_change', args=(c.id,), current_app='custom')
For more details, see the documentation on :ref:`reversing namespaced URLs
<topics-http-reversing-url-namespaces>`.
To allow easier reversing of the admin urls in templates, Django provides an
``admin_urlname`` filter which takes an action as argument:
.. code-block:: html+django
{% load admin_urls %}
<a href="{% url opts|admin_urlname:'add' %}">Add user</a>
<a href="{% url opts|admin_urlname:'delete' user.pk %}">Delete this user</a>
The action in the examples above match the last part of the URL names for
:class:`ModelAdmin` instances described above. The ``opts`` variable can be any
object which has an ``app_label`` and ``model_name`` attributes and is usually
supplied by the admin views for the current model.
.. currentmodule:: django.contrib.admin.views.decorators
The ``staff_member_required`` decorator
=======================================
.. function:: staff_member_required(redirect_field_name='next', login_url='admin:login')
This decorator is used on the admin views that require authorization. A
view decorated with this function will having the following behavior:
* If the user is logged in, is a staff member (``User.is_staff=True``), and
is active (``User.is_active=True``), execute the view normally.
* Otherwise, the request will be redirected to the URL specified by the
``login_url`` parameter, with the originally requested path in a query
string variable specified by ``redirect_field_name``. For example:
``/admin/login/?next=/admin/polls/question/3/``.
Example usage::
from django.contrib.admin.views.decorators import staff_member_required
@staff_member_required
def my_view(request):
...
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