[1.10.x] Fixed #27111 -- Fixed KeyError if USERNAME_FIELD isn't in UserCreationForm.fields.

Backport of 3c18f8a3d2f61669493f9ff2015ddc027eada3d6 from master

1 files changed, 17 insertions, 1 deletions

diff --git a/tests/auth_tests/test_forms.py b/tests/auth_tests/test_forms.py
index fe22d1e20b..64c095bf2a 100644
--- a/tests/auth_tests/test_forms.py
+++ b/tests/auth_tests/test_forms.py
@@ -22,7 +22,9 @@ from django.utils.encoding import force_text
 from django.utils.text import capfirst
 from django.utils.translation import ugettext as _
 
-from .models.custom_user import CustomUser, ExtensionUser
+from .models.custom_user import (
+    CustomUser, CustomUserWithoutIsActiveField, ExtensionUser,
+)
 from .settings import AUTH_TEMPLATES
 
 
@@ -208,6 +210,20 @@ class UserCreationFormTest(TestDataMixin, TestCase):
         form = CustomUserCreationForm(data)
         self.assertTrue(form.is_valid())
 
+    def test_custom_form_hidden_username_field(self):
+        class CustomUserCreationForm(UserCreationForm):
+            class Meta(UserCreationForm.Meta):
+                model = CustomUserWithoutIsActiveField
+                fields = ('email',)  # without USERNAME_FIELD
+
+        data = {
+            'email': 'testclient@example.com',
+            'password1': 'testclient',
+            'password2': 'testclient',
+        }
+        form = CustomUserCreationForm(data)
+        self.assertTrue(form.is_valid())
+
     def test_password_whitespace_not_stripped(self):
         data = {
             'username': 'testuser',