test/app/Http/Traits/ModelBoost.php

<?php

/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2019/4/9 0009
 * Time: 13:27
 */

namespace App\Http\Traits;

use Illuminate\Database\Eloquent\Builder;

trait ModelBoost
{
    public function scopeProject(Builder $query, $projectIds = null)
    {
        if ($projectIds === null) {
            return $query;
        }
        return $query->where('project_id', $projectIds);
    }
}