Laravel/Eloquent:致命错误:在非对象上调用成员函数connection()

Question

我正在Laravel 4中构建一个包,但在尝试访问数据库时遇到非对象错误,似乎是一个正确实例化的对象.这是设置:

有问题的配置和类:

composer.json:

...
"autoload": {
        "classmap": [
            "app/commands",
            "app/controllers",
            "app/models",
            "app/database/migrations",
            "app/database/seeds",
            "app/tests/TestCase.php"
        ],
        "psr-0": {
            "Vendor\\Chat": "src/vendor/chat/src"
        }  
    }
...

班级:

namespace Vendor\Chat;

use Illuminate\Database\Eloquent\Model as Eloquent;


class ChatHistory extends Eloquent
{
    protected $table = 'chat_history';

    protected $fillable = array('message', 'user_id', 'room_token');

    public function __construct($attributes = array())
    {
        parent::__construct($attributes);
    }

}

电话:

$message = new Message($msg);

$history = new ChatHistory;
$history->create(array(
                 'room_token' => $message->getRoomToken(),
                 'user_id' => $message->getUserId(),
                 'message' => $message->getMessage(),
              ));

错误:

PHP Fatal error:  Call to a member function connection() on a non-object in /home/vagrant/project/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php on line 2894

我相信我错过了一些基本的东西.感谢您的帮助!

编辑:

这是实例化ChatHistory并调用write的类:

namespace Vendor\Chat;

use Ratchet\MessageComponentInterface;
use Ratchet\ConnectionInterface;

use Vendor\Chat\Client;
use Vendor\Chat\Message;
use Vendor\Chat\ChatHistory;

use Illuminate\Database\Model;

class Chat implements MessageComponentInterface {

    protected $app;

    protected $clients;

    public function __construct() 
    {
        $this->clients = new \SplObjectStorage;
    }

    public function onOpen(ConnectionInterface $conn) 
    {
        $client = new Client;
        $client->setId($conn->resourceId);
        $client->setSocket($conn);

        $this->clients->attach($client);
    }

    public function onMessage(ConnectionInterface $conn, $msg) 
    {
        $message = new Message($msg);

        $history = new ChatHistory;
        ChatHistory::create(array(
                     'room_token' => $message->getRoomToken(),
                     'user_id' => $message->getUserId(),
                     'message' => $message->getMessage(),
                  ));
        /* error here */
        /* ... */ 
    }

    public function onClose(ConnectionInterface $conn) 
    {
        $this->clients->detach($conn);
    }

    public function onError(ConnectionInterface $conn, \Exception $e) 
    {
        $conn->close();
    }

    protected function getClientByConn(ConnectionInterface $conn)
    {
        foreach($this->clients as $client) {
            if($client->getSocket() === $conn) {
                return $client;
            } 
        } 

        return null;
    }
}

DB不可用的事实表明Eloquent没有被加载到顶部？

Answer 1

答案:

使用服务提供商的boot方法引导程序包.

说明:

由于您正在开发一个与Laravel一起使用的软件包,因此制作您自己的Capsule实例毫无意义.你可以直接使用Eloquent.

你的代码遇到它时,你的问题似乎源于DB/ Eloquent尚未设置.

你没有向我们展示你的服务提供商,但我猜你正在使用一个并在register方法中完成所有工作.

由于您的软件包依赖于在DatabaseServiceProvider自己执行之前要连接的不同服务提供者(),因此引导软件包的正确位置在您的服务提供者的boot方法中.

以下是文档的引用:

在register注册服务提供程序时立即调用该方法,而boot仅在路由请求之前调用该命令.

因此,如果您的服务提供商中的操作依赖于已经注册的其他服务提供商,您应该使用该boot方法.

Answer 2

如果你正在使用流明,你可能会遇到同样的问题.在这种情况下,只需取消注释:

// $app->withFacades();

// $app->withEloquent();

在 bootstrap\app.php

Answer 3

@matpop和@TonyStark走在正确的轨道上:Capsule\Manager没有被启动.

use Illuminate\Database\Capsule\Manager as Capsule;

$capsule = new Capsule;
$capsule->addConnection([
    'driver'    => 'mysql',
    'host'      => 'localhost',
    'database'  => 'project',
    'username'  => 'root',
    'password'  => '',
    'charset'   => 'utf8',
    'collation' => 'utf8_unicode_ci',
    'prefix'    => '',
]);

// Set the event dispatcher used by Eloquent models... (optional)
use Illuminate\Events\Dispatcher;
use Illuminate\Container\Container;

$capsule->setEventDispatcher(new Dispatcher(new Container));

// Make this Capsule instance available globally via static methods... (optional)
$capsule->setAsGlobal();

// Setup the Eloquent ORM... (optional; unless you've used setEventDispatcher())
$capsule->bootEloquent();

我可以在启动后扩展Eloquent.我认为另一种解决方案可能是(但没有经过测试):

include __DIR__ . '/../../vendor/autoload.php';
$app = require_once __DIR__ . '/../../bootstrap/start.php';
$app->boot();