trait controller

<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
trait ApiControllerTrait
{
    protected $relationships = [];

    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index(Request $request)
    {
        $with = isset($request->all()['with']) ? $request->all()['with'] : [];
        if(!is_array($with)){
            $with = explode(",",$with); 
            $this->relationships = $with;
        }

        //dd($with);

        $limit = isset($request->all()['limit']) ? $request->all()['limit'] : 20;

        $order = isset($request->all()['order']) ? $request->all()['order'] : null;
        if ($order !== null) {
          $order = explode(',', $order);
        }
        $order[0] = isset($order[0]) ? $order[0] : $this->model->getKeyName();
        $order[1] = isset($order[1]) ? $order[1] : 'asc';
        $where = isset($request->all()['where']) ? $request->all()['where'] : [];
        $like = isset($request->all()['like']) ? $request->all()['like'] : null;
        if ($like) {
          $like = explode(',', $like);
          $like[1] = '%' . $like[1] . '%';
        }

        $result = $this->model->orderBy($order[0], $order[1])
          ->where(function($query) use ($like) {
            if ($like) {
              return $query->where($like[0], 'like', $like[1]);
            }
            return $query;
          })
          ->where($where)
          ->with($this->relationships)
          ->paginate($limit);

        if(count(collect($result)['data']) < 1){
            return response()->json(["error"=> true, "message"=>"Not Found"],404);
        }

        return response()->json($result);
    }

    public function show($id)
    {
        $result = $this->model->with($this->relationships())
          ->findOrFail($id);
        return response()->json($result);
    }

    protected function relationships()
    {
      if (isset($this->relationships)) {
        return $this->relationships;
      }
      return [];
    }
}