fixbug tablesLength

@@ -359,15 +359,17 @@ Page({
             obj.form.cusdem=res.data.cusdem;
             obj.form.rid=id;
             obj.form.tid=[];
+            let tablesed=[];
             res.data.tables.forEach((t,ti)=>{
+                if(ti>=3) return;
                 t.isselect=true
-                res.data.tables[ti]=t;
                 obj.form.tid.push(t.id)
+                tablesed.push(t);
             })
             this.setData({
                 timePickerIndex:timePickerIndex,
                 form:obj.form,
-                tablesed:res.data.tables,
+                tablesed:tablesed,
             })
         }catch (e){
             console.log('initModify',e)