Ticket #12628: generic_inlines_save.diff

django/contrib/contenttypes/generic.py

@@ -387 +387 @@
             fields = flatten_fieldsets(self.declared_fieldsets)
         else:
             fields = None
+
+        readonly_fields = getattr(self, 'readonly_fields', None)
+        if readonly_fields:
+            if not self.exclude:
+                self.exclude = []
+
+            self.exclude.extend(readonly_fields)
+
         defaults = {
             "ct_field": self.ct_field,
             "fk_field": self.ct_fk_field,