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Code Issues 25 Releases Wiki Activity

Fixed #20846 -- Decreased User.username max_length to 150 characters.

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This commit is contained in:
Collin Anderson 2015-12-29 14:52:48 -05:00 committed by Tim Graham
parent ea7542891a
commit 780bddf75b
4 changed files with 21 additions and 7 deletions
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4
django/contrib/auth/migrations/0008_alter_user_username_max_length.py
View File

@ -17,8 +17,8 @@ class Migration(migrations.Migration):
name='username',
field=models.CharField(
error_messages={'unique': 'A user with that username already exists.'},
help_text='Required. 254 characters or fewer. Letters, digits and @/./+/-/_ only.',
max_length=254,
help_text='Required. 150 characters or fewer. Letters, digits and @/./+/-/_ only.',
max_length=150,
unique=True,
validators=[
django.core.validators.RegexValidator(

4
django/contrib/auth/models.py
View File

@ -303,9 +303,9 @@ class AbstractUser(AbstractBaseUser, PermissionsMixin):
"""
username = models.CharField(
_('username'),
max_length=254,
max_length=150,
unique=True,
help_text=_('Required. 254 characters or fewer. Letters, digits and @/./+/-/_ only.'),
help_text=_('Required. 150 characters or fewer. Letters, digits and @/./+/-/_ only.'),
validators=[
validators.RegexValidator(
r'^[\w.@+-]+$',

11
docs/ref/contrib/auth.txt
View File

@ -21,12 +21,19 @@ Fields
.. attribute:: username
Required. 254 characters or fewer. Usernames may contain alphanumeric,
Required. 150 characters or fewer. Usernames may contain alphanumeric,
``_``, ``@``, ``+``, ``.`` and ``-`` characters.
The ``max_length`` should be sufficient for many use cases. If you need
a longer length, please use a :ref:`custom user model
<specifying-custom-user-model>`. If you use MySQL with the ``utf8mb4``
encoding (recommended for proper Unicode support), specify at most
``max_length=191`` because MySQL can only create unique indexes with
191 characters in that case by default.
.. versionchanged:: 1.10
The ``max_length`` increased from 30 to 254 characters.
The ``max_length`` increased from 30 to 150 characters.
.. attribute:: first_name

9
docs/releases/1.10.txt
View File

@ -354,13 +354,20 @@ to its proxied concrete class. This inconsistency was fixed by returning the
full set of fields pointing to a concrete class or one of its proxies in both
cases.
:attr:`AbstractUser.username <django.contrib.auth.models.User.username>` ``max_length`` increased to 254
:attr:`AbstractUser.username <django.contrib.auth.models.User.username>` ``max_length`` increased to 150
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
A migration for :attr:`django.contrib.auth.models.User.username` is included.
If you have a custom user model inheriting from ``AbstractUser``, you'll need
to generate and apply a database migration for your user model.
We considered an increase to 254 characters to more easily allow the use of
email addresses (which are limited to 254 characters) as usernames but rejected
it due to a MySQL limitation. When using the ``utf8mb4`` encoding (recommended
for proper Unicode support), MySQL can only create unique indexes with 191
characters by default. Therefore, if you need a longer length, please use a
custom user model.
If you want to preserve the 30 character limit for usernames, use a custom form
when creating a user or changing usernames::