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Code Issues 32 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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docs/releases/1.10.txt
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@@ -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::