tid 去重

@@ -278,7 +278,8 @@ Page({
                 buttonhide: true,
             })
             let form = this.data.form;
-            form.tid = form.tid.toString();
+            let tid= new Set(form.tid);//tid 去重
+            form.tid = [...tid].toString();
             form.sid = this.sellerid;
             form.rdate =rdate
             if(!form.rid){