Ticket #9218: key-error-on-empty-pk-field-in-forms-fix.patch

forms/models.py

@@ -232 +232 @@
                 continue
             # MySQL can't handle ... WHERE pk IS NULL, so make sure we
             # don't generate queries of that form.
-            is_null_pk = f.primary_key and self.cleaned_data[name] is None
+            is_null_pk = f.primary_key and self.cleaned_data.has_key(name) and self.cleaned_data[name] is None
             if name in self.cleaned_data and f.unique and not is_null_pk:
                 unique_checks.append((name,))