問題描述

我正在 Laravel 4 中構建一個包，但在嘗試訪問似乎是正確實例化對象的數據庫時出現非對象錯誤.設置如下:

I'm building a package in Laravel 4 but am getting a non-object error when attempting to access the db from which seems to be a properly instantiated object. Here's the setup:

有問題的配置和類:

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"
        }  
    }
...

班級:

namespace VendorChat;

use IlluminateDatabaseEloquentModel 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);
    }

}

電話:

$message = new Message($msg);

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

錯誤:

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

我相信我遺漏了一些基本的東西.感謝您的任何幫助！

I believe I'm missing something fundamental and under my nose. Thanks for any and all help!

這是實例化 ChatHistory 并調用寫入的類:

Here is the class that's instantiating ChatHistory and calling the write:

namespace VendorChat;

use RatchetMessageComponentInterface;
use RatchetConnectionInterface;

use VendorChatClient;
use VendorChatMessage;
use VendorChatChatHistory;

use IlluminateDatabaseModel;

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 不可用的事實表明 Eloquent 沒有被加載到頂部?

The fact that DB isn't available suggest that Eloquent isn't being loaded up top?

推薦答案

答案:

在您的服務提供商的 boot 方法中引導您的包.

Bootstrap your package in your service provider's boot method.

說明:

既然你正在開發一個與 Laravel 一起使用的包，那么制作你自己的 Capsule 實例是沒有意義的.你可以直接使用 Eloquent.

Since you're developing a package to be used with Laravel, there's no point in making your own Capsule instance. You can just use Eloquent directly.

您的問題似乎源于 DB/Eloquent 在您的代碼命中時尚未設置.

Your problem seems to stem from DB/Eloquent not being set up yet by the time your code hits it.

您沒有向我們展示您的服務提供商，但我猜您正在使用一個并在 register 方法中完成所有操作.

You have not shown us your service provider, but I'm guessing you're using one and doing it all in the register method.

由于您的包依賴于不同的服務提供商 (DatabaseServiceProvider) 在它自己執行之前進行連接，因此引導包的正確位置是您的服務提供商的 boot方法.