Add relationships support for pointers in errors

Signed-off-by: Mehdy Khoshnoody <[email protected]>

Author: mehdy

rest_framework_json_api/utils.py

@@ -394,9 +394,14 @@ def format_drf_errors(response, context, exc):
             errors.extend(format_error_object(message, "/data", response))
     # handle all errors thrown from serializers
     else:
+        relationship_fields = getattr(
+            context["view"].serializer_class, "included_serializers", dict()
+        ).keys()
+
         for field, error in response.data.items():
             field = format_field_name(field)
-            pointer = "/data/attributes/{}".format(field)
+            rel = "relationships" if field in relationship_fields else "attributes"
+            pointer = "/data/{}/{}".format(rel, field)
             if isinstance(exc, Http404) and isinstance(error, str):
                 # 404 errors don't have a pointer
                 errors.extend(format_error_object(error, None, response))