无法在Laravel 5.2的Scope类内调用Auth类 [英] Can not call Auth class inside Scope class in Laravel 5.2

问题描述

我添加了用户模型的外部范围.简单创建的Scope，名称为DeveloperScope

I added External Scope for User Model. Simply created Scope, with the name DeveloperScope

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

class DeveloperScope implements Scope
{
    public function apply(Builder $builder, Model $model)
    {
        if(Auth::user()->id != 1){
            $builder->where('id', '<>', 1);
        }
    }
}

然后，我将此范围称为用户模型.

Then, I called this scope for User model.

用户模型

use Illuminate\Auth\Authenticatable;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Auth\Passwords\CanResetPassword;
use Illuminate\Contracts\Auth\Authenticatable as AuthenticatableContract;
use Illuminate\Contracts\Auth\CanResetPassword as CanResetPasswordContract;
use Illuminate\Database\Eloquent\SoftDeletes;
use App\Models\Scopes\DeveloperScope;

class User extends Model implements AuthenticatableContract, CanResetPasswordContract
{
    use SoftDeletes;
    use Authenticatable, CanResetPassword;


    protected $table = 'users';

    protected $fillable = ['first_name', 'last_name', 'email', 'password'];

    protected $hidden = ['password', 'remember_token'];

    protected $dates = ['deleted_at'];

    protected static function boot()
    {
        parent::boot();

        static::addGlobalScope(new DeveloperScope);
    }
}

当我在DeveloperScope类中不使用Auth::class时，效果很好.原因是，我只想为所有Eloquent方法的其他用户隐藏主要用户.当然，我可以使用会话代替Auth并检索用户ID.但是对我来说仍然很有趣，为什么浏览器在使用Auth::class时会出现错误:ERR_EMPTY_RESPONSE?

It works well, when I don't use Auth::class inside DeveloperScope class. The reason is that, I just want to hide the main user for another users for all Eloquent methods. Of course, I can use session instead of Auth and retrieve user id. But it is still interesting for me, why browser gives an error: ERR_EMPTY_RESPONSE while using Auth::class ?

推荐答案

您要查找的方法正是 Auth::hasUser() .该方法是通过我的PR在Laravel 5.6中添加的. (因此，您需要先升级Laravel)

The method what you are looking for is exactly Auth::hasUser(). The method was added in Laravel 5.6 through my PR. (So you need to upgrade Laravel first)

[5.6]增加了确定当前用户是否已通过身份验证而不会触发副作用的功能mpyw·拉取请求#24518·laravel/框架

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

class DeveloperScope implements Scope
{
    public function apply(Builder $builder, Model $model)
    {
        if (!Auth::hasUser() || Auth::user()->id != 1) {
            $builder->where('id', '<>', 1);
        }
    }
}

只需调用Auth::hasUser()即可防止Auth::user()引起副作用.

Just call Auth::hasUser() to prevent Auth::user() from causing side effects.

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