如何使用 laravel 删除数据透视表 table 中的单行

How do delete single row in pivot table with laravel

我想删除数据透视表中的单行数据 table。我没有收到任何错误,但是当我尝试点击按钮时。它没有将我重定向到任何地方,因此没有执行删除功能。

在上图中我想删除 user_id = 3 的突出显示的 id 我的情况是,用户突然无法参加 even_id = 6,所以他想参加 delete/unjoined 活动。

route

Route::get('/user/event/{event}', 'HomeController@destroy')->name('user.event.destroy');

blade

@foreach ($events as $event)
    <tr>
       <td>{{$loop->index +1 }}</td>
       <td>{{$event->event_name}}</td>
       <td>{{$event->event_date}}</td>
       <td>
        <form method="POST" action="{{ route('user.event.destroy',$event)}}">
          @csrf 
          @method('DELETE')
           <a class="btn btn-danger">Unjoined!</a> 
         </form>
         </td>
    </tr>
@endforeach

controller

public function storeEventUser(Request $request)
    {
       $user = User::find(Auth::user()->id);
     //how I storing my pivot data (just to show if anyone asking)
      $user->events()->syncWithoutDetaching([$request->event_id]);
    }


 public function destroy($event)
    {
        $event= Event::findOrFail($event_id);
        $user->events()->detach($event);
        return redirect()->back()->with('success','Deleted.');
    }

Event model

 public function users()
    {
        return $this->belongsToMany(User::class,'event_user','event_id','user_id');
    }

user model

public function events()
    {
        return $this->belongsToMany(Event::class,'event_user','user_id','event_id');
    }

为了简单起见,我正在调整您的控制器方法以使用路由模型绑定:

public function destroy(Event $event)
{
    Auth::user()->events()->detach($event);
    // or from the other side of the relationship
    // $event->users()->detach(Auth::user());

    return redirect()->back()->with('success', 'Deleted.');
}

如评论中所述,如果您想使用表单通过 @method('DELETE') blade指令。

旁注:

Auth::user() returns 一个 User 实例,因此您无需在 storeEventUser 方法中再次查询它:

$user = Auth::user();