Laravel 广播通知 - 尝试发送通知时出现错误“array_key_exists()”答案

【问题标题】：Laravel Broadcast notification - Error "array_key_exists()" when try to send notificationLaravel 广播通知 - 尝试发送通知时出现错误“array_key_exists()”
【发布时间】：2020-06-17 08:04:36
【问题描述】：

我正在尝试在数据更改时向用户发送广播通知。但是每次我尝试发送通知时，都会收到此错误：

array_key_exists(): The first argument should be either a string or an integer.

这是我的通知：

class MyNotification extends Notification
{
    use Queueable;

    public $games;

    public $title;
    public $summary;
    public $url;

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

        $this->title = "Your games";
        $this->summary = "Games for {$games[0]->team}";
        $this->url = "/some/url";
    }

    public function via($notifiable)
    {
        return ['mail','broadcast','database'];
    }

    /**
     * Get the mail representation of the notification.
     *
     * @param  mixed  $notifiable
     * @return \Illuminate\Notifications\Messages\MailMessage
     */
    public function toMail($notifiable)
    {
        return (new MailMessage)
            ->subject($this->title)
            ->line($this->summary);
    }

    /**
     * Get the voice representation of the notification.
     *
     * @param  mixed  $notifiable
     * @return PushMessage
     */
    public function toPush($notifiable)
    {
        // ...
    }

    public function toBroadcast($notifiable)
    {
        return new BroadcastMessage($this->toArray($notifiable));
    }

    /**
     * Get the array representation of the notification.
     *
     * @param  mixed  $notifiable
     * @return array
     */
    public function toArray($notifiable)
    {
        return [
            'icon' => 'fa fa-calendar',
            'text' => $this->summary,
            'title' => $this->title,
            'url' => $this->url
        ];
    }
}

当我从via 数组中删除“广播”时，一切正常。我不知道我做错了什么！有人可以帮忙吗？谢谢！

编辑这是我的完整堆栈跟踪

Stack trace:
  1. ErrorException-&gt;() /var/www/html/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php:321
  2. array_key_exists() /var/www/html/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php:321
  3. Illuminate\Database\Eloquent\Model-&gt;getAttribute() /var/www/html/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php:1396
  4. Illuminate\Database\Eloquent\Model-&gt;getKey() /var/www/html/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php:1406
  5. Illuminate\Database\Eloquent\Model-&gt;getQueueableId() /var/www/html/vendor/laravel/framework/src/Illuminate/Support/HigherOrderCollectionProxy.php:60
  6. Illuminate\Support\HigherOrderCollectionProxy-&gt;Illuminate\Support\{closure}() [internal]:0
  7. array_map() /var/www/html/vendor/laravel/framework/src/Illuminate/Support/Collection.php:638
  8. Illuminate\Support\Collection-&gt;map() /var/www/html/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Collection.php:254
  9. Illuminate\Database\Eloquent\Collection-&gt;map() /var/www/html/vendor/laravel/framework/src/Illuminate/Support/HigherOrderCollectionProxy.php:61
 10. Illuminate\Support\HigherOrderCollectionProxy-&gt;__call() /var/www/html/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Collection.php:549
 11. Illuminate\Database\Eloquent\Collection-&gt;getQueueableIds() /var/www/html/vendor/laravel/framework/src/Illuminate/Queue/SerializesAndRestoresModelIdentifiers.php:25
 12. Illuminate\Notifications\Notification-&gt;getSerializedPropertyValue() /var/www/html/vendor/laravel/framework/src/Illuminate/Queue/SerializesModels.php:23
 13. Illuminate\Notifications\Notification-&gt;__sleep() [internal]:0
 14. serialize() /var/www/html/vendor/laravel/framework/src/Illuminate/Queue/Queue.php:139
 15. Illuminate\Queue\Queue-&gt;createObjectPayload() /var/www/html/vendor/laravel/framework/src/Illuminate/Queue/Queue.php:110
 16. Illuminate\Queue\Queue-&gt;createPayloadArray() /var/www/html/vendor/laravel/framework/src/Illuminate/Queue/Queue.php:88
 17. Illuminate\Queue\Queue-&gt;createPayload() /var/www/html/vendor/laravel/framework/src/Illuminate/Queue/SyncQueue.php:40
 18. Illuminate\Queue\SyncQueue-&gt;push() /var/www/html/vendor/laravel/framework/src/Illuminate/Queue/Queue.php:44
 19. Illuminate\Queue\Queue-&gt;pushOn() /var/www/html/vendor/laravel/framework/src/Illuminate/Broadcasting/BroadcastManager.php:127
 20. Illuminate\Broadcasting\BroadcastManager-&gt;queue() /var/www/html/vendor/laravel/framework/src/Illuminate/Events/Dispatcher.php:267
 21. Illuminate\Events\Dispatcher-&gt;broadcastEvent() /var/www/html/vendor/laravel/framework/src/Illuminate/Events/Dispatcher.php:190
 22. Illuminate\Events\Dispatcher-&gt;dispatch() /var/www/html/vendor/laravel/framework/src/Illuminate/Notifications/Channels/BroadcastChannel.php:51
 23. Illuminate\Notifications\Channels\BroadcastChannel-&gt;send() /var/www/html/vendor/laravel/framework/src/Illuminate/Notifications/NotificationSender.php:146
 24. Illuminate\Notifications\NotificationSender-&gt;sendToNotifiable() /var/www/html/vendor/laravel/framework/src/Illuminate/Notifications/NotificationSender.php:105
 25. Illuminate\Notifications\NotificationSender-&gt;Illuminate\Notifications\{closure}() /var/www/html/vendor/laravel/framework/src/Illuminate/Support/Traits/Localizable.php:19
 26. Illuminate\Notifications\NotificationSender-&gt;withLocale() /var/www/html/vendor/laravel/framework/src/Illuminate/Notifications/NotificationSender.php:107
 27. Illuminate\Notifications\NotificationSender-&gt;sendNow() /var/www/html/vendor/laravel/framework/src/Illuminate/Notifications/NotificationSender.php:79
 28. Illuminate\Notifications\NotificationSender-&gt;send() /var/www/html/vendor/laravel/framework/src/Illuminate/Notifications/ChannelManager.php:39
 29. Illuminate\Notifications\ChannelManager-&gt;send() /var/www/html/vendor/laravel/framework/src/Illuminate/Support/Facades/Facade.php:261
 30. Illuminate\Support\Facades\Facade-&gt;__callStatic() /var/www/html/app/Http/Controllers/Basketball/BasketballGameController.php:458
 31. App\Http\Controllers\Basketball\BasketballGameController-&gt;updateJudges() /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
 32. call_user_func_array() /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
 33. Illuminate\Routing\Controller-&gt;callAction() /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:45
 34. Illuminate\Routing\ControllerDispatcher-&gt;dispatch() /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Route.php:219
 35. Illuminate\Routing\Route-&gt;runController() /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Route.php:176
 36. Illuminate\Routing\Route-&gt;run() /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Router.php:681
 37. Illuminate\Routing\Router-&gt;Illuminate\Routing\{closure}() /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:130
 38. Illuminate\Pipeline\Pipeline-&gt;Illuminate\Pipeline\{closure}() /var/www/html/vendor/laravel/framework/src/Illuminate/Auth/Middleware/Authenticate.php:43
 39. Illuminate\Auth\Middleware\Authenticate-&gt;handle() /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:171
 40. Illuminate\Pipeline\Pipeline-&gt;Illuminate\Pipeline\{closure}() /var/www/html/vendor/barryvdh/laravel-cors/src/HandleCors.php:58
 41. Barryvdh\Cors\HandleCors-&gt;handle() /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:171
 42. Illuminate\Pipeline\Pipeline-&gt;Illuminate\Pipeline\{closure}() /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Middleware/SubstituteBindings.php:41
 43. Illuminate\Routing\Middleware\SubstituteBindings-&gt;handle() /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:171
 44. Illuminate\Pipeline\Pipeline-&gt;Illuminate\Pipeline\{closure}() /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Middleware/ThrottleRequests.php:59
 45. Illuminate\Routing\Middleware\ThrottleRequests-&gt;handle() /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:171
 46. Illuminate\Pipeline\Pipeline-&gt;Illuminate\Pipeline\{closure}() /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:105
 47. Illuminate\Pipeline\Pipeline-&gt;then() /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Router.php:683
 48. Illuminate\Routing\Router-&gt;runRouteWithinStack() /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Router.php:658
 49. Illuminate\Routing\Router-&gt;runRoute() /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Router.php:624
 50. Illuminate\Routing\Router-&gt;dispatchToRoute() /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Router.php:613
 51. Illuminate\Routing\Router-&gt;dispatch() /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php:170
 52. Illuminate\Foundation\Http\Kernel-&gt;Illuminate\Foundation\Http\{closure}() /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:130
 53. Illuminate\Pipeline\Pipeline-&gt;Illuminate\Pipeline\{closure}() /var/www/html/vendor/fideloper/proxy/src/TrustProxies.php:57
 54. Fideloper\Proxy\TrustProxies-&gt;handle() /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:171
 55. Illuminate\Pipeline\Pipeline-&gt;Illuminate\Pipeline\{closure}() /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php:21
 56. Illuminate\Foundation\Http\Middleware\TransformsRequest-&gt;handle() /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:171
 57. Illuminate\Pipeline\Pipeline-&gt;Illuminate\Pipeline\{closure}() /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/ValidatePostSize.php:27
 58. Illuminate\Foundation\Http\Middleware\ValidatePostSize-&gt;handle() /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:171
 59. Illuminate\Pipeline\Pipeline-&gt;Illuminate\Pipeline\{closure}() /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/CheckForMaintenanceMode.php:62
 60. Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode-&gt;handle() /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:171
 61. Illuminate\Pipeline\Pipeline-&gt;Illuminate\Pipeline\{closure}() /var/www/html/vendor/barryvdh/laravel-cors/src/HandleCors.php:58
 62. Barryvdh\Cors\HandleCors-&gt;handle() /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:171
 63. Illuminate\Pipeline\Pipeline-&gt;Illuminate\Pipeline\{closure}() /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:105
 64. Illuminate\Pipeline\Pipeline-&gt;then() /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php:145
 65. Illuminate\Foundation\Http\Kernel-&gt;sendRequestThroughRouter() /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php:110
 66. Illuminate\Foundation\Http\Kernel-&gt;handle() /var/www/html/public/index.php:55

编辑 2

在我的通知构造函数中，我有一个使用复合键的模型。当我删除此行时：$this->games = $games;，并将$this->summary 编辑为某个字符串 - 它可以工作！ $games是模型Game的集合。

但我不知道为什么会这样？！

【问题讨论】：

错误消息告诉您错误发生在哪一行，并提供用户代码中发生错误的点的回溯。
@miken32 否，因为我想返回相同的数组，如 toArray()
请分享您的完整错误堆栈
@Sehdev 查看我的编辑。谢谢！
尝试摆脱use Queueable;，看看是否可以解决问题。至少它应该使走线更短。如果您从浏览器上的异常报告中复制此内容，它还应该显示传递给 array_key_exists 的参数，这可能会帮助您找出问题所在。

标签： laravel broadcast laravel-echo laravel-notification laravel-broadcast

【解决方案1】：

如果我理解正确，原因很简单，因为您的模型使用组合键 not supported by eloquent。

因此，由于我对整个通知/广播模块的了解有限，这就是我认为实际发生的事情。

您尝试发送通知，然后调度程序将您的通知传递给广播管理器，因为您指定在您的 via 方法中广播它
然后广播管理器将尝试将您的 MyNotification 事件推送到队列中
要将事件推送到队列中，它将尝试创建通知类的有效负载并尝试对其进行序列化
您从中扩展的 Notification 基类实际上实现了 Illuminate\Queue\SerializesModels 特征，因此会自动尝试序列化通知类属性中的所有模型
在尝试序列化 Game 对象的 eloquent 集合时，该集合尝试在集合中的每个模型上调用 getQueueableId，然后失败，因为它尝试根据您的复合键检索属性

至于解决方案，我会说尝试删除模型上的复合键，因为在使用 eloquent 时它似乎无法按预期工作。

// in Game model
protected $primaryKey = 'id';

根据队列上的这个documentation，您也可以尝试在MyNotification 类上添加broadcastWith 方法，尽管我不确定这是否会绕过SerializeModels trait 的序列化方法。

// in MyNotification
public function broadcastWith()
{
    return ['id' => $this->id];
}

或者根据您自己的反复试验，您可以将其转换为数组，而不是使用集合初始化 $this->games。毕竟，最终，您的toBroadcast 方法才是真正控制广播的方法。

$this->games = $games->toArray();

最后的选择是覆盖 Game 模型的 getQueueableId() 方法。

// in Game Model
public function getQueueableId()
{
    return $this->id; 

    // or if you still want to utilize your composite keys. UNTESTED
    return $this->key_one.$this->key_two;
}

【讨论】：

感谢getQueueableId() 的提示...它为我节省了将所有内容重写为->toArray() 的工作
嗨@Mike_NotGuilty 除了getQueueableId() 之外，您还需要覆盖任何其他方法吗？你在Game 上的$primaryKey 看起来像什么？还是列名数组吗？
@Daniel 不确定你是否对它感兴趣，但我在 Eloquent 中经常使用复合主键。请参阅我对这个问题的回答。

【解决方案2】：

我知道我参加聚会有点晚了，但我经常使用 Laravel/Eloquent 复合键。

并不是说它是一个详尽/完整的存储库，但我确实维护了一个 Git repository 来帮助我处理 Eloquent 的一些缺点（以及添加一些额外的功能）。

特别是，我创建了一个 trait，它覆盖了 Eloquent 的一些函数，这些函数专门用于处理 Laravel 顽固地否认 RDBMS 不能全部建立在伪造的 ID 主键字段之上这一事实.

我不会在此处以完整的形式编写所有覆盖函数，因为随着我发现需要满足的新情况，它们往往会随着时间的推移而发展。尽管如此，我目前在我的 trait 中覆盖的函数名称如下：

public function getKeyName();
public function getKey();
public function setKeysForSaveQuery();
public function getKeyForSaveQuery();

在我的测试中，我的 trait 确实弥补了 OP 报告的（我认为是）错误。

如果有人有兴趣帮助维护这样的存储库，请告诉我！合作总是值得赞赏的。

【讨论】：