Laravel의 전역 범위, 쉬운 방법.

<?php

namespace App\Scopes;

use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Scope;
use Auth;

class ComplaintScope implements Scope
{
    /**
     * Apply the scope to a given Eloquent query builder.
     * @param  \Illuminate\Database\Eloquent\Builder  $builder
     * @param  \Illuminate\Database\Eloquent\Model  $model
     * @return void
     */
    public function apply(Builder $builder, Model $model)
    {
        // builder is the query 
        if (Auth::user()->isClient()) {
            $builder->where('user_id', Auth::id());
        } elseif (Auth::user()->isCommercial()) {
            $builder->whereHas('user', function (Builder $query) {
                $query->where('commercial_id', Auth::user()->id);
            });
        }
    }
}

use App\Scopes\ComplaintScope;

//add that function to the model
    protected static function booted()
    {
        static::addGlobalScope(new ComplaintScope);
    }