Ticket #12285: 12285.diff

django/forms/models.py

@@ -214 +214 @@
                  empty_permitted=False, instance=None):
         opts = self._meta
         if instance is None:
+            if not opts.model:
+                raise Exception('ModelForm has no model class specified')
             # if we didn't get an instance, instantiate a new one
             self.instance = opts.model()
             object_data = {}

tests/modeltests/model_forms/models.py

@@ -1543 +1543 @@
 >>> f.is_valid()
 True
 
+>>> class NoModelModelForm(ModelForm):
+...     pass
+
+>>> f = NoModelModelForm()
+Traceback (most recent call last):
+    ...
+Exception: ModelForm has no model class specified
+
 # Clean up
 >>> import shutil
 >>> shutil.rmtree(temp_storage_dir)