diff --git a/collection/opendb-news-favorite/collection.json b/collection/opendb-news-favorite/collection.json
index fdc6a13..0272a08 100644
--- a/collection/opendb-news-favorite/collection.json
+++ b/collection/opendb-news-favorite/collection.json
@@ -18,7 +18,10 @@
       },
       "user_id": {
         "bsonType": "string",
-        "description": "收藏者id，参考uni-id-users表"
+        "description": "收藏者id，参考uni-id-users表",
+        "forceDefaultValue": {
+          "$env": "uid"
+        }
       },
       "create_date": {
         "bsonType": "timestamp",