Laravel 5设置模型事件以“清理”;模型删除时的数据透视表 - Laravel 5 setup model event to "clear up" pivot tables on model delete

Laravel 5 setup model event to "clear up" pivot tables on model delete

我正在使用Laravel 5构建一个基于用户的应用程序。有些模型在我的应用程序中有manyToMany关系，因此我使用数据透视表。

当我从系统中删除用户时，我使用这个简单的函数:

/**
 * Delete user.
 *
 * @param $id
 * @return mixed
 */
public function deleteUser($id)
{
    return $this->user->whereId($id)->delete();
}

但是，当用户被删除时，数据透视表中的行(例如role_user))不会被删除。

我在laravel网站上读到，我可以使用模型事件来"清理"我的数据透视表，但我真的不确定我将如何实现。

谁能给我指个正确的方向?

编辑

下面是我当前的模型设置:

namespace App'Models'User;
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 App'Scopes'MultiTenantTrait;
class User extends Model implements AuthenticatableContract, CanResetPasswordContract
{
    use Authenticatable, CanResetPassword, MultiTenantTrait;
    /**
     * The database table used by the model.
     *
     * @var string
     */
    protected $table = 'user';
    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = ['cust_id', 'first_name', 'last_name', 'email', 'status', 'activation_code'];
    /**
     * The attributes excluded from the model's JSON form.
     *
     * @var array
     */
    protected $hidden = ['password', 'remember_token'];
    /**
     * Boot the model.
     *
     */
    public static function boot()
    {
        parent::boot();
        static::deleting(function($user)
        {
            $user->roles()->delete();
            $user->supervisors()->delete();
            $user->types()->delete();
            $user->rates()->delete();
            $user->miscs()->delete();
        });
    }
...

您可以为您的模型添加一个启动方法，如下所示:

public static function boot() {
    parent::boot();
    // This is a deleting event on the model
    static::deleting(function($model) {
        $model->... //Here your model is still available
        // You could add something like this
        DB::table('role_user')->where('user_id', $model->id)->delete();
    })
}

但是你也可以在你的模型中扩展delete方法:

public function delete() {
    DB::table('role_user')->where('user_id', $this->id)->delete();
    parent::delete();
}