diff --git a/models/discount_detail.json b/models/discount_detail.json
index 740f3dc..b6d5141 100644
--- a/models/discount_detail.json
+++ b/models/discount_detail.json
@@ -85,7 +85,8 @@
             "field": "productid",
             "table": "product",
             "valuefield": "id",
-            "textfield": "product_name"
+            "textfield": "product_name",
+            "cond": "category_id=[[prodtypeid]]"
         }
     ]
 }