关于webman-admin 生成模块后修改的问题。

<?php

namespace app\controller;
use support\Request;
use support\Response;
use app\model\Buy;
use plugin\admin\app\controller\Crud;
use support\exception\BusinessException;

class IndexController extends Crud
{
    public function index(Request $request)
    {
        // Webman 使用 ThinkORM 进行查询
        $zj = Db::table('fg_buy')
            ->field('yh, SUM(xse) as total_xse')
            ->group('yh')
            ->order('total_xse', 'desc')
            ->limit(10)
            ->select();
         return json(['code' => 0, 'msg' => 'ok','data' =>$zj]);
    }

}