fixup! Do not lazy load forward relations

Author: Tim Csitkovics

rest_framework_json_api/serializers.py

@@ -183,7 +183,7 @@ def to_representation(self, instance):
         for field in readable_fields:
             try:
                 context = getattr(self, '_context', {})
-                request = getattr(context.get('request', None), '_request', None)
+                request = context.get('request', None)
                 is_included = field.source in get_included_resources(request)
                 if not is_included \
                         and isinstance(field, ModelSerializer) \