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Fixed #4667 -- Added support for inline generic relations in the admin. Thanks to Honza Král and Alex Gaynor for their work on this ticket.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@8279 bcc190cf-cafb-0310-a4f2-bffc1f526a37
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@ -132,7 +132,7 @@ class BaseModelAdmin(object):
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If kwargs are given, they're passed to the form Field's constructor.
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"""
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# If the field specifies choices, we don't need to look for special
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# admin widgets - we just need to use a select widget of some kind.
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if db_field.choices:
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@ -6,10 +6,15 @@ from django import oldforms
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from django.core.exceptions import ObjectDoesNotExist
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from django.db import connection
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from django.db.models import signals
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from django.db import models
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from django.db.models.fields.related import RelatedField, Field, ManyToManyRel
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from django.db.models.loading import get_model
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from django.utils.functional import curry
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from django.forms import ModelForm
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from django.forms.models import BaseModelFormSet, modelformset_factory, save_instance
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from django.contrib.admin.options import InlineModelAdmin, flatten_fieldsets
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class GenericForeignKey(object):
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"""
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Provides a generic relation to any object through content-type/object-id
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@ -273,13 +278,111 @@ def create_generic_related_manager(superclass):
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class GenericRel(ManyToManyRel):
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def __init__(self, to, related_name=None, limit_choices_to=None, symmetrical=True):
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self.to = to
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self.num_in_admin = 0
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self.related_name = related_name
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self.filter_interface = None
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self.limit_choices_to = limit_choices_to or {}
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self.edit_inline = False
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self.raw_id_admin = False
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self.symmetrical = symmetrical
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self.multiple = True
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assert not (self.raw_id_admin and self.filter_interface), \
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"Generic relations may not use both raw_id_admin and filter_interface"
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class BaseGenericInlineFormSet(BaseModelFormSet):
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"""
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A formset for generic inline objects to a parent.
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"""
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ct_field_name = "content_type"
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ct_fk_field_name = "object_id"
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def __init__(self, data=None, files=None, instance=None, save_as_new=None):
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opts = self.model._meta
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self.instance = instance
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self.rel_name = '-'.join((
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opts.app_label, opts.object_name.lower(),
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self.ct_field.name, self.ct_fk_field.name,
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))
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super(BaseGenericInlineFormSet, self).__init__(
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queryset=self.get_queryset(), data=data, files=files,
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prefix=self.rel_name
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)
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def get_queryset(self):
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# Avoid a circular import.
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from django.contrib.contenttypes.models import ContentType
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if self.instance is None:
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return self.model._default_manager.empty()
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return self.model._default_manager.filter(**{
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self.ct_field.name: ContentType.objects.get_for_model(self.instance),
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self.ct_fk_field.name: self.instance.pk,
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})
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def save_new(self, form, commit=True):
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# Avoid a circular import.
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from django.contrib.contenttypes.models import ContentType
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kwargs = {
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self.ct_field.get_attname(): ContentType.objects.get_for_model(self.instance).pk,
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self.ct_fk_field.get_attname(): self.instance.pk,
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}
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new_obj = self.model(**kwargs)
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return save_instance(form, new_obj, commit=commit)
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def generic_inlineformset_factory(model, form=ModelForm,
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formset=BaseGenericInlineFormSet,
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ct_field="content_type", fk_field="object_id",
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fields=None, exclude=None,
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extra=3, can_order=False, can_delete=True,
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max_num=0,
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formfield_callback=lambda f: f.formfield()):
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"""
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Returns an ``GenericInlineFormSet`` for the given kwargs.
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You must provide ``ct_field`` and ``object_id`` if they different from the
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defaults ``content_type`` and ``object_id`` respectively.
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"""
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opts = model._meta
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# Avoid a circular import.
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from django.contrib.contenttypes.models import ContentType
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# if there is no field called `ct_field` let the exception propagate
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ct_field = opts.get_field(ct_field)
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if not isinstance(ct_field, models.ForeignKey) or ct_field.rel.to != ContentType:
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raise Exception("fk_name '%s' is not a ForeignKey to ContentType" % ct_field)
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fk_field = opts.get_field(fk_field) # let the exception propagate
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if exclude is not None:
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exclude.extend([ct_field.name, fk_field.name])
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else:
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exclude = [ct_field.name, fk_field.name]
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FormSet = modelformset_factory(model, form=form,
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formfield_callback=formfield_callback,
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formset=formset,
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extra=extra, can_delete=can_delete, can_order=can_order,
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fields=fields, exclude=exclude, max_num=max_num)
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FormSet.ct_field = ct_field
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FormSet.ct_fk_field = fk_field
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return FormSet
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class GenericInlineModelAdmin(InlineModelAdmin):
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ct_field = "content_type"
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ct_fk_field = "object_id"
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formset = BaseGenericInlineFormSet
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def get_formset(self, request, obj=None):
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if self.declared_fieldsets:
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fields = flatten_fieldsets(self.declared_fieldsets)
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else:
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fields = None
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defaults = {
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"ct_field": self.ct_field,
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"fk_field": self.ct_fk_field,
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"form": self.form,
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"formfield_callback": self.formfield_for_dbfield,
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"formset": self.formset,
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"extra": self.extra,
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"can_delete": True,
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"can_order": False,
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"fields": fields,
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}
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return generic_inlineformset_factory(self.model, **defaults)
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class GenericStackedInline(GenericInlineModelAdmin):
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template = 'admin/edit_inline/stacked.html'
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class GenericTabularInline(GenericInlineModelAdmin):
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template = 'admin/edit_inline/tabular.html'
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@ -785,6 +785,47 @@ Finally, register your ``Person`` and ``Group`` models with the admin site::
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Now your admin site is set up to edit ``Membership`` objects inline from
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either the ``Person`` or the ``Group`` detail pages.
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Using generic relations as an inline
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------------------------------------
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It is possible to use an inline with generically related objects. Let's say
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you have the following models::
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class Image(models.Model):
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image = models.ImageField(upload_to="images")
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content_type = models.ForeignKey(ContentType)
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object_id = models.PositiveIntegerField()
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content_object = generic.GenericForeignKey("content_type", "object_id")
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class Product(models.Model):
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name = models.CharField(max_length=100)
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If you want to allow editing and creating ``Image`` instance on the ``Product``
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add/change views you can simply use ``GenericInlineModelAdmin`` provided by
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``django.contrib.contenttypes.generic``. In your ``admin.py`` for this
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example app::
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from django.contrib import admin
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from django.contrib.contenttypes import generic
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from myproject.myapp.models import Image, Product
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class ImageInline(generic.GenericTabularInline):
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model = Image
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class ProductAdmin(admin.ModelAdmin):
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inlines = [
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ImageInline,
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]
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admin.site.register(Product, ProductAdmin)
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``django.contrib.contenttypes.generic`` provides both a ``GenericTabularInline``
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and ``GenericStackedInline`` and behave just like any other inline. See the
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`contenttypes documentation`_ for more specific information.
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.. _contenttypes documentation: ../contenttypes/
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``AdminSite`` objects
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=====================
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@ -72,11 +72,11 @@ together, uniquely describe an installed model:
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`the verbose_name attribute`_ of the model.
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Let's look at an example to see how this works. If you already have
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the contenttypes application installed, and then add `the sites
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application`_ to your ``INSTALLED_APPS`` setting and run ``manage.py
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syncdb`` to install it, the model ``django.contrib.sites.models.Site``
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will be installed into your database. Along with it a new instance
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of ``ContentType`` will be created with the following values:
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the contenttypes application installed, and then add `the sites application`_
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to your ``INSTALLED_APPS`` setting and run ``manage.py syncdb`` to install it,
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the model ``django.contrib.sites.models.Site`` will be installed into your
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database. Along with it a new instance of ``ContentType`` will be created with
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the following values:
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* ``app_label`` will be set to ``'sites'`` (the last part of the Python
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path "django.contrib.sites").
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@ -261,3 +261,27 @@ Note that if you delete an object that has a ``GenericRelation``, any objects
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which have a ``GenericForeignKey`` pointing at it will be deleted as well. In
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the example above, this means that if a ``Bookmark`` object were deleted, any
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``TaggedItem`` objects pointing at it would be deleted at the same time.
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Generic relations in forms and admin
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------------------------------------
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``django.contrib.contenttypes.genric`` provides both a ``GenericInlineFormSet``
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and ``GenericInlineModelAdmin``. This enables the use of generic relations in
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forms and the admin. See the `model formset`_ and `admin`_ documentation for
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more information.
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``GenericInlineModelAdmin`` options
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The ``GenericInlineModelAdmin`` class inherits all properties from an
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``InlineModelAdmin`` class. However, it adds a couple of its own for working
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with the generic relation:
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* ``ct_field`` - The name of the ``ContentType`` foreign key field on the
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model. Defaults to ``content_type``.
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* ``ct_fk_field`` - The name of the integer field that represents the ID
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of the related object. Defaults to ``object_id``.
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.. _model formset: ../modelforms/
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.. _admin: ../admin/
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@ -191,4 +191,24 @@ __test__ = {'API_TESTS':"""
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>>> cheetah.delete()
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>>> Comparison.objects.all()
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[<Comparison: tiger is stronger than None>]
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# GenericInlineFormSet tests ##################################################
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>>> from django.contrib.contenttypes.generic import generic_inlineformset_factory
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>>> GenericFormSet = generic_inlineformset_factory(TaggedItem, extra=1)
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>>> formset = GenericFormSet(instance=Animal())
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>>> for form in formset.forms:
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... print form.as_p()
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<p><label for="id_generic_relations-taggeditem-content_type-object_id-0-tag">Tag:</label> <input id="id_generic_relations-taggeditem-content_type-object_id-0-tag" type="text" name="generic_relations-taggeditem-content_type-object_id-0-tag" maxlength="50" /></p>
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<p><label for="id_generic_relations-taggeditem-content_type-object_id-0-DELETE">Delete:</label> <input type="checkbox" name="generic_relations-taggeditem-content_type-object_id-0-DELETE" id="id_generic_relations-taggeditem-content_type-object_id-0-DELETE" /><input type="hidden" name="generic_relations-taggeditem-content_type-object_id-0-id" id="id_generic_relations-taggeditem-content_type-object_id-0-id" /></p>
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>>> formset = GenericFormSet(instance=platypus)
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>>> for form in formset.forms:
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... print form.as_p()
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<p><label for="id_generic_relations-taggeditem-content_type-object_id-0-tag">Tag:</label> <input id="id_generic_relations-taggeditem-content_type-object_id-0-tag" type="text" name="generic_relations-taggeditem-content_type-object_id-0-tag" value="shiny" maxlength="50" /></p>
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<p><label for="id_generic_relations-taggeditem-content_type-object_id-0-DELETE">Delete:</label> <input type="checkbox" name="generic_relations-taggeditem-content_type-object_id-0-DELETE" id="id_generic_relations-taggeditem-content_type-object_id-0-DELETE" /><input type="hidden" name="generic_relations-taggeditem-content_type-object_id-0-id" value="5" id="id_generic_relations-taggeditem-content_type-object_id-0-id" /></p>
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<p><label for="id_generic_relations-taggeditem-content_type-object_id-1-tag">Tag:</label> <input id="id_generic_relations-taggeditem-content_type-object_id-1-tag" type="text" name="generic_relations-taggeditem-content_type-object_id-1-tag" maxlength="50" /></p>
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<p><label for="id_generic_relations-taggeditem-content_type-object_id-1-DELETE">Delete:</label> <input type="checkbox" name="generic_relations-taggeditem-content_type-object_id-1-DELETE" id="id_generic_relations-taggeditem-content_type-object_id-1-DELETE" /><input type="hidden" name="generic_relations-taggeditem-content_type-object_id-1-id" id="id_generic_relations-taggeditem-content_type-object_id-1-id" /></p>
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"""}
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