zulip/zproject/authhack.py

52 lines
1.8 KiB
Python

# Hack to allow longer-than-72-characters inputs into "username" forms
#
# This is needed because we're using the email address as the "username".
#
# This code can go away once we switch to Django 1.5 with pluggable
# user models
#
# Adapted from https://gist.github.com/1143957
from django.conf import settings
import sys
USERNAME_MAXLENGTH = getattr(settings, 'USERNAME_MAXLENGTH', 72)
def hack_forms(length=USERNAME_MAXLENGTH, forms=[
'django.contrib.auth.forms.UserCreationForm',
'django.contrib.auth.forms.UserChangeForm',
'django.contrib.auth.forms.AuthenticationForm',
]):
"""
Hacks username length in django forms.
"""
for form in forms:
modulename, sep, classname = form.rpartition('.')
if not modulename in sys.modules:
__import__(modulename)
module = sys.modules[modulename]
klass = getattr(module, classname)
hack_single_form(klass, length)
def hack_single_form(form_class, length=USERNAME_MAXLENGTH):
if hasattr(form_class, 'declared_fields'):
fields = form_class.declared_fields
elif hasattr(form_class, 'base_fields'):
fields = form_class.base_fields
else:
raise TypeError('Provided object: %s doesnt seem to be a valid Form or '
'ModelForm class.' % form_class)
username = fields['username']
hack_validators(username.validators)
username.max_length = length
username.widget.attrs['maxlength'] = length
def hack_validators(validators, length=USERNAME_MAXLENGTH):
from django.core.validators import MaxLengthValidator
for key, validator in enumerate(validators):
if isinstance(validator, MaxLengthValidator):
validators.pop(key)
validators.insert(0, MaxLengthValidator(length))
hack_forms()