您无法在laravel中序列化或反序列化PDO实例

时间:2019-02-01 09:57:17

标签: php laravel events serialization queue

我正在使用像这样的默认laravel事件系统

use \Illuminate\Database\Connection;

class ExampleService {

private $connection;

    public function __construct(Connection $connection)
    {
        $this->connection = $connection;
    }
}

class ExampleEvent {

    private $service;

    public function __construc(ExampleService $service) {
        $this->service = $service;
    }
}


class ExampleListener implements ShouldQueue {

    public function handle(ExampleEvent $event) {

    }
}

这是我的自定义服务,我在其中使用连接而不是雄辩,每当我注入时,我就将事件从服务解析为侦听器并将其放在队列中,我将得到错误You cannot serialize or unserialize PDO instances。我希望我的监听器与implements ShouldQeueue一起使用,而不是创建一个不同的作业并从同一个监听器进行调度

1 个答案:

答案 0 :(得分:2)

将项目添加到队列会对其进行序列化。

连接包含一个PDO实例,但是您无法序列化PDO实例,因此,您会收到该错误。

您应该实现__sleep and __wakeup方法以确保序列化正确进行,例如:

class ExampleService {

    private $connection;

    public function __construct(Connection $connection)
    {
        $this->connection = $connection;

    }

    public function __sleep() {
         return []; //Pass the names of the variables that should be serialised here
    }
    public function __wakeup() {
         //Since we can't serialize the connection we need to re-open it when we unserialise
         $this->connection = app()->make(Connection::class); 
    }
}