Laravel 队列不允许“闭包”的序列化

Question

我需要帮助以使用 Laravel 调度作业，似乎系统在使用队列作业时尝试序列化闭包，因此出现此错误。

我该如何解决这个问题？我也试过这个包
https://github.com/jeremeamia/super_closure
但在我的情况下它不起作用。

这是我的代码：

在控制器 FacebookController 中：

public function getPosts(\SammyK\LaravelFacebookSdk\LaravelFacebookSdk $fb) //get all post of logged user
{
    dispatch(new SyncFacebook($fb));
}

还有要派遣的工作：

<?php

namespace App\Jobs;

use Illuminate\Bus\Queueable;
use Illuminate\Queue\SerializesModels;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;

use Session, DB, Carbon\Carbon, Auth;

use App\{
    User, Reaction, Post, Synchronisation
};

class SyncFacebook implements ShouldQueue
{
    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;

    protected $fb;

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

    public function handle()
    {
        set_time_limit(0);
        $user = Auth::user();

        try {
          $response = $this->fb->get('/me/posts?limit=100', session('fb_user_access_token'));
        } catch(\Facebook\Exceptions\FacebookSDKException $e) {
          dd($e->getMessage());
        }

        $postEdge = $response->getGraphEdge();

        if(count($postEdge) > 0){

            $pageCount = 0;
            $maxPages = 9000000000000000000;

            DB::beginTransaction();

            try{

                do{
                    foreach ($postEdge as $result) {
                        $result = $result->asArray();
                        $post_id = $result['id'];

                        $post = Post::where('post_id', $post_id)->first() ?: new Post;
                        $post->post_id = $post_id;
                        $post->user_id = $user->id;
                        $post->timezone = collect($result['created_time'])->toArray()['timezone'];
                        $post->post_date = collect($result['created_time'])->toArray()['date'];
                        $post->content = $result['message'] ?? $result['story'] ?? '';
                        $post->save();

                        $req = !empty(Synchronisation::whereUserId($user->id)->orderBy('id','desc')->date) ? 
                        $post_id.'/reactions?limit=100&summary=total_count&since'.time(Synchronisation::whereUserId($user->id)->orderBy('id','desc')->date) : 
                        $post_id.'/reactions?limit=100&summary=total_count';

                        try {
                          $response = $this->fb->get($req, session('fb_user_access_token'));
                        } catch(\Facebook\Exceptions\FacebookSDKException $e) {
                          dd($e->getMessage());
                        }
                        $reactionEdge = $response->getGraphEdge();

                        $total_reactions = $reactionEdge->getMetaData()['summary']['total_count'] ?? null;
                        //dd($total_reactions);
                        $post->total_reactions = $total_reactions;
                        $post->save();

                        if(count($reactionEdge)){
                            $pagesReactionCount = 0;
                            do{
                                foreach($reactionEdge as $react){
                                    $react = $react->asArray();

                                    $reaction = Reaction::where('reaction_id', $react['id'])->first() ?: new Reaction;
                                    $reaction->type = $react['type'];
                                    $reaction->reaction_id = $react['id'];
                                    $reaction->post_id = $post->id;
                                    $reaction->author = $react['name'];
                                    $reaction->save();
                                }
                                $pagesReactionCount++;
                            }

                            while($pagesReactionCount < $maxPages && $reactionEdge = $this->fb->next($reactionEdge));


                        }
                    }
                    $pageCount++;
                  }
                  while ($pageCount < $maxPages && $postEdge = $this->fb->next($postEdge));

                  $synchro = new Synchronisation;
                  $synchro->user_id = $user->id;
                  $synchro->date = now();
                  $synchro->completed = true;
                  $synchro->save();
            }
            catch(ValidationException $e){
                DB::rollback();
                if(env('APP_ENV') != 'production'){
                    dd($e->getMessage());
                }
            }

            DB::commit();
        }
        else{
            //no post
        }
    }
}

似乎错误出在$this->fb = $fb; 的构造函数上 // 'Closure' 的序列化是不允许的

Answer 1

我的理解是你不能在 Job 中包含不可序列化的变量，因为 Laravel 在存储作业详细信息时不知道如何处理它们。

因此，您需要从 construct() 方法以及关联的 protected $fb; 和 $this->fb = $fb; 行中删除 $fb。

相反，您有两个选择

1) 简单

在handle() 方法中创建一个新的\SammyK\LaravelFacebookSdk\LaravelFacebookSdk 对象，例如

public function handle() {
    $fb = new \SammyK\LaravelFacebookSdk\LaravelFacebookSdk;

    '.... replace all $this->fb with $fb
}

2) 高级

如果您需要传递之前使用的特定 FB 实例，请按照文档中的说明注册 FacebookSDK Service Provider 和 inject it into the handler。

例如

public function handle(FacebookSDK $fb) {

    '.... replace all $this->fb with $fb

}

当您为 Facebook SDK 注册绑定服务容器时，handle() 方法中的此类型提示会自动检索 $fb 实例并将其注入准备使用的方法中。您可以确定是每次都创建一个新的 FacebookSDK 对象，还是只创建一个并始终使用该对象（称为 Singleton）。

Answer 2

有时通过将队列从同步更改为数据库也可以解决此问题。