Firewall on Demand

from django.utils.translation import ugettext as _

from django.db.models.signals import class_prepared

from django.core.validators import MaxLengthValidator

from flowspy.monkey_patch import MAX_USERNAME_LENGTH

def longer_username(sender, *args, **kwargs):

    if sender.__name__ == "User" and sender.__module__ == "django.contrib.auth.models":

        sender._meta.get_field("username").max_length = MAX_USERNAME_LENGTH()

        # For Django 1.2 to work, the validator has to be declared apart from max_length

        sender._meta.get_field("username").validators = [MaxLengthValidator(MAX_USERNAME_LENGTH())]

        sender._meta.get_field("username").help_text = _("Required, %s characters or fewer. Only letters, numbers, and @, ., +, -, or _ characters." % MAX_USERNAME_LENGTH())

class_prepared.connect(longer_username)