feat: productid联动过滤，cond条件category_id=[[prodtypeid]]

models/discount_detail.json

@@ -85,7 +85,8 @@
             "field": "productid",
             "table": "product",
             "valuefield": "id",
-            "textfield": "product_name"
+            "textfield": "product_name",
+            "cond": "category_id=[[prodtypeid]]"
         }
     ]
 }