laravel 中创建自定义分页、查询构造器方法

<?php

namespace App\Utils;

use Illuminate\Pagination\LengthAwarePaginator;

class Paginator extends LengthAwarePaginator
{
 /**
  * 重写 laravel 分页的 toArray 方法
  * @return array
  */
 public function toArray()
 {
     return [
         'list'     => $this->items->toArray(),
         'total'    => $this->total(),
         'pages'    => $this->lastPage(),
         'cur_page' => $this->currentPage(),
         'per_page' => $this->perPage(),
     ];
 }
}

<?php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;
use Illuminate\Database\Eloquent\Builder;
use App\Utils\Paginator;

class QueryServiceProvider extends ServiceProvider
{
 /**
  * Register any application services.
  *
  * @return void
  */
 public function register()
 {
     // 自定义查询
     Builder::macro('suWhere', function ($where) {
         foreach ($where as $key => $v) {
             if (empty($v) && $v !== 0) {
                 continue;
             }
             if (is_array($v)) {
                 if ($v['where'] == 'mark') {
                     $this->query->where($v['key'], $v['ope'], $v['val']);
                 } else {
                     $this->query->{$v['where']}($v['key'], $v['val']);
                 }
             } else {
                 $this->query->where($key, $v);
             }
         }
         return $this;
     });

     // 自定义分页返回
     Builder::macro('page', function ($page, $perPage) {
         return $this->paginate($perPage, ['*'], 'page', $page)->toArray();
     });

     // 重新绑定 LengthAwarePaginator
     $this->app->bind('Illuminate\Pagination\LengthAwarePaginator', function ($app, $options) {
         return new Paginator(
             $options['items'], $options['total'], $options['perPage'],
             $options['currentPage'], $options['options']
         );
     });
 }

 /**
  * Bootstrap any application services.
  *
  * @return void
  */
 public function boot()
 {
     //
 }
}

'providers' => [
     ······
     App\Providers\QueryServiceProvider::class,
],

$where[] = [
     'where' => 'mark',
     'key'   => 'sku',
     'ope'   => 'like',
     'val'   => "%S%",
];
$res = $this->productList->select(['id', 'sku'])->suWhere($where)->page(1, 10);
dd($res);