Question

我在运行此代码时遇到问题：

//DashboardController

public function getStream()
{
      $user                 = Sentry::getUser();
      $userid               = $user->id;
      $convs                = TBMsg::getUserConversations($userid);
      $getNumOfParticipants = $convs->getNumOfParticipants();
      $participants         = $convs->getAllParticipants();
      $lastMessage          = $convs->getLastMessage();
      $senderId             = $lastMessage->getSender();
      $content              = $lastMessage->getContent();
      $status               = $lastMessage->getStatus();
      $posts                = Post::whereIn('user_id', function($query) {
      $query->select('follow_id')
            ->from('user_follows')
            ->where('user_id', '1');
        })->orWhere('user_id', '1')->get();

      return View::make('stream', array('getNumOfParticipants' => $getNumOfParticipants, 
                                        'participants'         => $participants, 
                                        'lastMessage'          => $lastMessage, 
                                        'senderId'             => $senderId, 
                                        'content'              => $content, 
                                        'status'               => $status
        ))->with('posts', $posts)->with('convs', $convs);
}

}

我收到此错误：调用未定义的方法Illuminate \ Support \ Collection :: getNumOfParticipants（）

http://i.stack.imgur.com/9N3xU.png

Answer 1

$convs是一个集合，因此您无法在其上调用仅存在于单个模型上的方法。就像软件包的教程一样，你必须遍历集合才能使用该函数 From the how to：

foreach ( $convs as $conv ) {

        $getNumOfParticipants = $conv->getNumOfParticipants();
        $participants = $conv->getAllParticipants();

        /* $lastMessage Tzookb\TBMsg\Entities\Message */
        $lastMessage = $conv->getLastMessage();

        $senderId = $lastMessage->getSender();
        $content = $lastMessage->getContent();
        $status = $lastMessage->getStatus();
    }

Answer 2

将->get()替换为->first()，因为您现在基本上返回了一组数组，但是您需要这样做。

 $query->select('follow_id')
        ->from('user_follows')
        ->where('user_id', '1');
    })->orWhere('user_id', '1') // ->get() is removed
    ->first();

调用未定义的方法Illuminate \ Support \ Collection

2 个答案: