Don't break old tests

Author: jarekwg

rest_framework_json_api/serializers.py

@@ -6,7 +6,7 @@
 from rest_framework_json_api.relations import ResourceRelatedField
 from rest_framework_json_api.utils import (
     get_resource_type_from_model, get_resource_type_from_instance,
-    get_resource_type_from_serializer, get_included_serializers)
+    get_resource_type_from_serializer, get_included_serializers, get_included_resources)
 
 
 class ResourceIdentifierObjectSerializer(BaseSerializer):
@@ -90,7 +90,7 @@ def validate_path(serializer_class, field_path, path):
                 validate_path(this_included_serializer, new_included_field_path, path)
 
         if request and view:
-            included_resources = utils.get_included_resources(request)
+            included_resources = get_included_resources(request)
             for included_field_name in included_resources:
                 included_field_path = included_field_name.split('.')
                 this_serializer_class = view.get_serializer_class()

rest_framework_json_api/utils.py

@@ -241,10 +241,14 @@ def get_included_resources(request, serializer=None):
     if include_resources_param:
         return include_resources_param.split(',')
     else:
-        try:
-            return list(serializer.JSONAPIMeta.included_resources)
-        except AttributeError:
-            return []
+        return get_default_included_resources_from_serializer(serializer)
+
+
+def get_default_included_resources_from_serializer(serializer):
+    try:
+        return list(serializer.JSONAPIMeta.included_resources)
+    except AttributeError:
+        return []
 
 
 def get_included_serializers(serializer):