fix error on read-only serializer

tfranzel · May 23, 2021 · d71b5f8 · d71b5f8
1 parent f58bbb0
commit d71b5f8
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/drf_spectacular/openapi.py b/drf_spectacular/openapi.py
@@ -654,8 +654,11 @@ def _map_serializer_field(self, field, direction):
         if isinstance(field, serializers.ReadOnlyField):
             # direct source from the serializer
             assert field.source_attrs, f'ReadOnlyField "{field}" needs a proper source'
-            target = follow_field_source(field.parent.Meta.model, field.source_attrs)
-
+            if hasattr(field.parent, "Meta"):
+                target = follow_field_source(field.parent.Meta.model, field.source_attrs)
+            else:
+                if isinstance(field.parent, serializers.ListSerializer):
+                    return append_meta(build_array_type(build_basic_type(OpenApiTypes.OBJECT)), meta)
             if callable(target):
                 schema = self._map_response_type_hint(target)
             elif isinstance(target, models.Field):