1 files changed, 4 insertions, 4 deletions
diff --git a/src/web/models/right_mixin.py b/src/web/models/right_mixin.py
index c4d92008..6b2f1b67 100644
--- a/src/web/models/right_mixin.py
+++ b/src/web/models/right_mixin.py
@@ -2,19 +2,19 @@ class RightMixin:
 
     @staticmethod
     def _fields_base_write():
-        return {}
+        return set()
 
     @staticmethod
     def _fields_base_read():
-        return {'id'}
+        return set(['id'])
 
     @staticmethod
     def _fields_api_write():
-        return {}
+        return set([])
 
     @staticmethod
     def _fields_api_read():
-        return {'id'}
+        return set(['id'])
 
     @classmethod
     def fields_base_write(cls):