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[3.0.x] Fixed #30776 -- Restored max length validation on AuthenticationForm.UsernameField. 

Regression in 5ceaf14686.

Thanks gopackgo90 for the report and Mariusz Felisiak for tests.

Backport of 6c9778a58e from master
This commit is contained in:
Sam Reynolds 2019-09-17 15:21:50 +01:00 committed by Mariusz Felisiak
parent 6c761a25fb
commit e74ca0226a
2 changed files with 5 additions and 1 deletions
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4
django/contrib/auth/forms.py
View File

@ -191,7 +191,9 @@ class AuthenticationForm(forms.Form):
# Set the max length and label for the "username" field.
self.username_field = UserModel._meta.get_field(UserModel.USERNAME_FIELD)
self.fields['username'].max_length = self.username_field.max_length or 254
username_max_length = self.username_field.max_length or 254
self.fields['username'].max_length = username_max_length
self.fields['username'].widget.attrs['maxlength'] = username_max_length
if self.fields['username'].label is None:
self.fields['username'].label = capfirst(self.username_field.verbose_name)

2
tests/auth_tests/test_forms.py
View File

@ -423,6 +423,7 @@ class AuthenticationFormTest(TestDataMixin, TestCase):
CustomEmailField.objects.create_user(**data)
form = AuthenticationForm(None, data)
self.assertEqual(form.fields['username'].max_length, 255)
self.assertEqual(form.fields['username'].widget.attrs.get('maxlength'), 255)
self.assertEqual(form.errors, {})
@override_settings(AUTH_USER_MODEL='auth_tests.IntegerUsernameUser')
@ -435,6 +436,7 @@ class AuthenticationFormTest(TestDataMixin, TestCase):
IntegerUsernameUser.objects.create_user(**data)
form = AuthenticationForm(None, data)
self.assertEqual(form.fields['username'].max_length, 254)
self.assertEqual(form.fields['username'].widget.attrs.get('maxlength'), 254)
self.assertEqual(form.errors, {})
def test_username_field_label(self):