无法将 Eloquent 模型传递给 Laravel Job

Question

我正在按照 Laravel 的文档将 Eloquent 模型传递给 Laravel 作业。然而，尽管我尽了最大努力，我还是无法通过 Eloquent 模型——它总是“未定义”或其他奇怪的错误。

这是一个 Laravel 5.7 应用程序，目前在 MacOS/Darwin、MySQL 5.5 和 PHP 7.2 上运行。该作业是从另一个作业启动的。我有一份工作，然后分派许多子工作。

// From the Job itself
public function __construct(\App\Course $courseToDB)
{
    $this->courseToDB = $courseToDB;
}

public function handle(App\Course $courseToDB)
{        
    Log::info($this->courseToDB);
}
// From where I am dispatching the job
\App\Jobs\syncCourse::dispatch($courseToDB)->onConnection('database');

我希望，当我使用$courseToDB（一个\App\Course 模型）发送作业时，作业将能够选择该模型并使用它进行操作。我遇到的问题是它不会将模型传递给工作。即使在最简单的日志记录场景中尝试使用它也会失败。

更新：我的模型

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;
use Carbon\Carbon;

class Course extends Model
{
    protected $fillable = ['id', 'name', 'category_id', 'teacher_id', 'moodle_id', 'summary'];

    public function teacher() {
        return $this->belongsTo('App\Teacher');
    }
    public function category() {
        return $this->belongsTo('App\Category');
    }
    public function views() {
        return $this->morphMany(
            \App\view::class,
            'viewable'
        );
    }
// A few other functions cut out (very simple one-liners)

}

更新：我的迁移

<?php

use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateCoursesTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('courses', function (Blueprint $table) {
            $table->increments('id');
            $table->string('name');
            $table->integer('moodle_id');
            $table->integer('teacher_id');
            $table->integer('category_id');
            $table->longText('summary')->nullable();
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('courses');
    }
}

更新：我的工作 (syncCourse)，即使什么都不做也会失败

<?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 Illuminate\Support\Facades\Log;
use App\Course;

class syncCourse implements ShouldQueue
{
    public $courseToDB;

    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;
    /**
     * Create a new job instance.
     *
     * @return void
     */
    public function __construct(Course $courseToDB)
    {
        //\App\Course $courseToDB
        $this->courseToDB = $courseToDB;
    }

    /**
     * Execute the job.
     *
     * @return void
     */
    public function handle()
    {        

    }
}

更新：从终端（运行时）

[2018-12-23 01:51:28][3891] Processing: App\Jobs\syncCourse
[2018-12-23 01:51:28][3891] Failed:     App\Jobs\syncCourse
[2018-12-23 01:51:28][3892] Processing: App\Jobs\syncCourse
[2018-12-23 01:51:28][3892] Failed:     App\Jobs\syncCourse
[2018-12-23 01:51:28][3893] Processing: App\Jobs\syncCourse
[2018-12-23 01:51:28][3893] Failed:     App\Jobs\syncCourse
[2018-12-23 01:51:28][3894] Processing: App\Jobs\syncCourse
[2018-12-23 01:51:28][3894] Failed:     App\Jobs\syncCourse
[2018-12-23 01:51:28][3895] Processing: App\Jobs\syncCourse
[2018-12-23 01:51:28][3895] Failed:     App\Jobs\syncCourse
[2018-12-23 01:51:28][3896] Processing: App\Jobs\syncCourse
[2018-12-23 01:51:28][3896] Failed:     App\Jobs\syncCourse
[2018-12-23 01:51:28][3897] Processing: App\Jobs\syncCourse
[2018-12-23 01:51:28][3897] Failed:     App\Jobs\syncCourse
[2018-12-23 01:51:28][3898] Processing: App\Jobs\syncCourse
[2018-12-23 01:51:28][3898] Failed:     App\Jobs\syncCourse
[2018-12-23 01:51:28][3899] Processing: App\Jobs\syncCourse
[2018-12-23 01:51:28][3899] Failed:     App\Jobs\syncCourse
[2018-12-23 01:51:28][3900] Processing: App\Jobs\syncCourse
[2018-12-23 01:51:28][3900] Failed:     App\Jobs\syncCourse
[2018-12-23 01:51:28][3901] Processing: App\Jobs\syncCourse
[2018-12-23 01:51:28][3901] Failed:     App\Jobs\syncCourse
[2018-12-23 01:51:28][3902] Processing: App\Jobs\syncCourse
[2018-12-23 01:51:28][3902] Failed:     App\Jobs\syncCourse
[2018-12-23 01:51:28][3903] Processing: App\Jobs\syncCourse
[2018-12-23 01:51:28][3903] Failed:     App\Jobs\syncCourse
[2018-12-23 01:51:28][3904] Processing: App\Jobs\syncCourse
[2018-12-23 01:51:28][3904] Failed:     App\Jobs\syncCourse
[2018-12-23 01:51:28][3905] Processing: App\Jobs\syncCourse
[2018-12-23 01:51:28][3905] Failed:     App\Jobs\syncCourse
[2018-12-23 01:51:28][3906] Processing: App\Jobs\syncCourse
[2018-12-23 01:51:28][3906] Failed:     App\Jobs\syncCourse
[2018-12-23 01:51:28][3907] Processing: App\Jobs\syncCourse
[2018-12-23 01:51:28][3907] Failed:     App\Jobs\syncCourse

在我的应用程序中，dispatchSync 调度数百个syncCourse 并传递一个 Eloquent 模型。传递 Eloquent 模型是有问题的，因为即使我对传递的模型完全什么都不做，它也会出错。 Laravel.log 的错误痕迹为零。

更新 2：在服务提供商中运行登录后

在服务提供者中打开日志记录后，所有的同步课程事件都没有完成。现在我的queue:work 看起来像这样：

[2018-12-23 02:10:41][5829] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5830] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5831] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5832] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5833] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5834] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5835] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5836] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5837] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5838] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5839] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5840] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5841] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5842] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5843] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5844] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5845] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5846] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5847] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5848] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5849] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5850] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5851] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5852] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5853] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5854] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5855] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5856] Processing: App\Jobs\syncCourse
[2018-12-23 02:10:41][5857] Processing: App\Jobs\syncCourse

在日志中：

[2018-12-23 02:10:34] local.ERROR: database
[2018-12-23 02:10:34] local.ERROR: Object of class Illuminate\Queue\Jobs\DatabaseJob could not be converted to string {"exception":"[object] (ErrorException(code: 0): Object of class Illuminate\\Queue\\J

Answer 1

尝试如下使用，

在类声明上方添加use \App\Course;。

在你的方法中使用Course::function_name()调用模型

在你的模型函数声明中必须喜欢public static function function_name()

或者分享你现在遇到的错误。

Answer 2

确保调试出错的地方。这是complete reference 的操作方法。

1.要为failed_jobs 表创建迁移，您可以使用queue:failed-table 命令：

   php artisan queue:failed-table

   php artisan migrate

1. 在handle() 方法之后包含以下方法。

   public function failed(Exception $exception)
   {
      //Your expection
      dd($exception)
   }