Ticket #12285: 12285-unit-test-ValueError.diff

django/forms/models.py

@@ -236 +236 @@
                  empty_permitted=False, instance=None):
         opts = self._meta
         if instance is None:
+            if opts.model is None:
+                raise ValueError('ModelForm has no model class specified')
             # if we didn't get an instance, instantiate a new one
             self.instance = opts.model()
             object_data = {}

tests/regressiontests/model_forms_regress/tests.py

@@ -145 +145 @@
         data = {'name': 'anonymous'}
         form = RealPersonForm(data)
         self.assertEqual(form.is_valid(), False)
-        self.assertEqual(form.errors['__all__'], ['Please specify a real name.']) 
+        self.assertEqual(form.errors['__all__'], ['Please specify a real name.'])
 
+class ModelClassTests(TestCase):
+    def test_no_model_class(self):
+        class NoModelModelForm(forms.ModelForm):
+            pass
+        self.assertRaises(ValueError, NoModelModelForm)