Call to undefined method Illuminate\Support\Collection - php

Question

I'm having a problem while running this code:
//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);
}
}
I got this error: Call to undefined method Illuminate\Support\Collection::getNumOfParticipants()
http://i.stack.imgur.com/9N3xU.png

Answer 1

Replace ->get() with ->first() as right now you're basically returning an collection of arrays but you need that.
$query->select('follow_id')
->from('user_follows')
->where('user_id', '1');
})->orWhere('user_id', '1') // ->get() is removed
->first();

Answer 2

$convs is a collection so you can't call a method on it that only exists on a single model. Like the tutorial of the package suggests you have to iterate over the collection to use that function.
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();
}