进行数据查询时,获取数据的变量 Undefined index

第三行，$parm默认值应该要是数组[]。

这样查舒服一点

$data=app(App\Services\Search\Db\MainService::class)->startFetchData();
//todo

MainService

<?php namespace App\Services\Search\Db;


use App\Services\Search\Db\Filter\MainFilter;
use DB;


class MainService
{

    protected $mainFilter;

    public function __construct(MainFilter $mainFilter)
    {
        $this->mainFilter = $mainFilter;
    }
    public function startFetchData()
    {
        return DB::table('xxx')->where(function ($query){
            $this->mainFilter->apply($query);
        })->get();

    }


}

QueryFilter

<?php namespace App\Services\Search\Db\Filter;


use Illuminate\Http\Request;
use Illuminate\Database\Query\Builder;

abstract class QueryFilter
{

    protected $request;
    protected $builder;

    public function __construct(Request $request)
    {
        $this->request = $request;
    }

    public function apply(Builder $builder)
    {
        $this->builder = $builder;
        foreach ($this->filters() as $name => $value) {

                if (method_exists($this, $name)) {
                    call_user_func_array([$this, $name],[$value]);
                }


        }

        return $this->builder;
    }
    public function filters()
    {
        return $this->request->all();
    }
}

MainFilter

<?php


namespace App\Services\Search\Db\Filter;


class MainFilter extends QueryFilter
{

    public function status($status)
    {
       return $this->builder->where('status',$status);
    }

}

....这个代码再精简下吧