diff --git a/collection/uni-id-base-order/collection.json b/collection/uni-id-base-order/collection.json
index 1f8a7ba..efabebf 100644
--- a/collection/uni-id-base-order/collection.json
+++ b/collection/uni-id-base-order/collection.json
@@ -25,7 +25,10 @@
       "user_id": {
         "bsonType": "String",
         "description": "下单用户ID，uni-id-users表",
-		"foreignKey":"uni-id-users._id"
+		"foreignKey":"uni-id-users._id",
+        "forceDefaultValue": {
+			"$env": "uid"
+		}
       },
       "platform": {
         "bsonType": "String",