根據laravel中的用戶標識刪除所有關聯5.2

Question

我想根據用戶標識刪除所有關聯。我有這樣

enter code here 
Array 
(
[id] => 1 
[title] => Mr 
[firstname] => kunal 
[lastname] => mahajan 
[business_email] => abc@gmail.com 
[username] => kunal 
[website] => 
[email] => kunal@gmail.com 
[address] => 
[image] => 
[password] => $2y$10$nk1O1jD38dLN4xlBpkj1feJYIj9nH17.v3jMTO1jdTn9V7Mv0SUBW 
[decrypt_password] => 123456 
[phonenumber] => 01610524545 
[mobile] => 7837329321 
[remember_token] => 
[email_verify] => 0 
[status] => 0 
[activation_key] => 
[created_at] => 2016-11-12 06:25:48 
[updated_at] => 2016-11-12 06:25:48 
[listings] => Array 
    (
     [id] => 1 
     [user_id] => 1 
     [property] => 
     [type] => premimum 
     [service_name] => Courses 
     [business_name] => kunal 
     [about] => ore ipsum is dummy text. 
     [address] => 
     [instagram] => www.instagram.com 
     [facebook] => www.facebook.com 
     [pinterest] => www.pinterest.com 
     [twitter] => www.twitter.com 
     [youtube] => www.youtube.com 
     [certifications] => Lorem ipsum is dummy text 
     [days] => 
     [from] => 
     [to] => 
     [location] => Ludhiana, Punjab, India 
     [postcode] => 
     [borough] => 
     [town] => 
     [latitude] => 30.9058885 
     [longitude] => 75.8359645 
     [squarefeet] => 
     [pricerange] => 
     [turnover] => 
     [netprofit] => 
     [information] => Lorem ipsum is dmmy text 
     [other] => 
     [facilities] => 
     [premises] => 
     [expansion] => 
     [reason] => 
     [competition] => 
     [established] => 
     [support] => 
     [employees] => 0 
     [furniture] => 
     [inventory] => 
     [created_at] => 2016-11-12 06:25:48 
     [updated_at] => 2016-11-12 06:25:48 
     [listingimage] => Array 
      (
       [0] => Array 
        (
         [id] => 1 
         [list_id] => 1 
         [image] => 602758083.jpg 
        ) 

       [1] => Array 
        (
         [id] => 2 
         [list_id] => 1 
         [image] => 631874072.jpg 
        ) 

       [2] => Array 
        (
         [id] => 3 
         [list_id] => 1 
         [image] => 572143726.jpg 
        ) 

       [3] => Array 
        (
         [id] => 4 
         [list_id] => 1 
         [image] => 845492008.jpg 
        ) 

       [4] => Array 
        (
         [id] => 5 
         [list_id] => 1 
         [image] => 22020276.jpeg 
        ) 

       [5] => Array 
        (
         [id] => 6 
         [list_id] => 1 
         [image] => 337797369.jpg 
        ) 

      ) 

     [courses] => Array 
      (
       [0] => Array 
        (
         [id] => 1 
         [list_id] => 1 
         [user_id] => 1 
         [course] => Nails Course 
         [fees] => 150 
         [weblink] => www.nails.com 
         [details] => Lorem ipsum is dummy text 
         [coursetype] => Part Time 
         [duration] => 6months 
         [requirement] => 15 Students 
         [certificate] => Lorem ipsum is dummy text.Lorem ipsum is dummy text.Lorem ipsum is dummy text. 
         [created_at] => 2016-11-12 06:25:48 
         [updated_at] => 2016-11-12 06:25:48 
        ) 

       [1] => Array 
        (
         [id] => 2 
         [list_id] => 1 
         [user_id] => 1 
         [course] => Skin Course 
         [fees] => 1500 
         [weblink] => www.skin.com 
         [details] => Lorem ipsum is dummy text 
         [coursetype] => Full Time 
         [duration] => 2 months 
         [requirement] => 10 students 
         [certificate] => Lorem ip[sum is dummy text 
         [created_at] => 2016-11-12 06:25:48 
         [updated_at] => 2016-11-12 06:25:48 
        ) 

      ) 

     [fitness_services] => Array 
      (
      ) 

    ) 
) 

我運行此查詢的數據，但我給我的成員函數列表錯誤消息（）調用 我有代碼： -

enter code here 
$alldata = SessionUser::with('listings')->findOrFail($userid); 
$alldata = json_decode(json_encode($alldata),true); 
echo "<pre>"; print_r($alldata); die; // This query fetch all data 
$deletedata = SessionUser::find($userid); 
$deletedata =json_decode(json_encode($deleteSessiondata),true); 
$deletedata->listings()->delete();// This query doesn't work 

誰能幫我出這一點。感謝提前:)

Answer 1

您可以使用Laravel's event handlers的 - deleting事件解決你的問題：

class User extends Eloquent 
{ 
    public function listings() 
    { 
     return $this->hasMany('App\Listing'); 
    } 

    // this is a recommended way to declare event handlers 
    protected static function boot() { 
     parent::boot(); 

     static::deleting(function($user) { // before delete() method call this 
      $user->listings()->delete(); 
      // do the rest of the cleanup... 
     }); 
    } 
} 

class Listing extends Eloquent 
{ 
    public function photo() 
    { 
     return $this->hasOne('App\Photo'); 
    } 

    // this is a recommended way to declare event handlers 
    protected static function boot() { 
     parent::boot(); 

     static::deleting(function($listing) { // before delete() method call this 
      $listing->photo()->delete(); 
      // do the rest of the cleanup... 
     }); 
    } 
} 

雄辯車型火的幾個事件，讓你掛接到各種 點模型的使用以下方法的生命週期：creating， created，updating，updated，saving，saved，deleting，deleted， restoring，restored。事件允許您每次輕鬆執行代碼 在數據庫中保存或更新特定的模型類。

希望這會有所幫助！