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from __future__ import unicode_literals
from django import forms
from django.contrib.auth import authenticate
from django.contrib.auth.forms import AuthenticationForm
from django.utils.translation import ugettext_lazy
ERROR_MESSAGE = ugettext_lazy("Please enter the correct %(username)s and password "
"for a staff account. Note that both fields may be case-sensitive.")
class AdminAuthenticationForm(AuthenticationForm):
"""
A custom authentication form used in the admin app.
"""
this_is_the_login_form = forms.BooleanField(widget=forms.HiddenInput, initial=1,
error_messages={'required': ugettext_lazy("Please log in again, because your session has expired.")})
def clean(self):
username = self.cleaned_data.get('username')
password = self.cleaned_data.get('password')
message = ERROR_MESSAGE
params = {'username': self.username_field.verbose_name}
if username and password:
self.user_cache = authenticate(username=username, password=password)
if self.user_cache is None:
raise forms.ValidationError(message, code='invalid', params=params)
elif not self.user_cache.is_active or not self.user_cache.is_staff:
raise forms.ValidationError(message, code='invalid', params=params)
return self.cleaned_data
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