opts = form._meta
if issubclass(form, EntityForm) and opts.model:
proxy_fields = proxy_fields_for_entity_model(opts.model).keys()
+
+ # Store readonly fields iff they have been declared.
+ if 'readonly_fields' in attrs or not hasattr(new_class, '_real_readonly_fields'):
+ new_class._real_readonly_fields = new_class.readonly_fields
+
readonly_fields = new_class.readonly_fields
- new_class._real_readonly_fields = readonly_fields
- new_class.readonly_fields = list(readonly_fields) + proxy_fields
+ new_class.readonly_fields = list(set(readonly_fields) | set(proxy_fields))
# Additional HACKS to handle raw_id_fields and other attributes that the admin
# uses model._meta.get_field to validate.