我正在關注 Laravel 5.7 關于事件注冊和生成的官方檔案：https ://laravel.com/docs/5.7/events#generating-events-and-listeners

我EventServiceProvider定義了以下事件：

<?php

namespace App\Providers;

use Illuminate\Foundation\Support\Providers\EventServiceProvider as ServiceProvider;

class EventServiceProvider extends ServiceProvider
{

    /**
     * The event handler mappings for the application.
     *
     * @var array
     */
    protected $listen = [
        'App\Events\FormBeforeCreate' => [
            'App\Listeners\WebhookBeforeCreate',
        ],
        'App\Events\FormAfterCreate' => [
            'App\Listeners\NotifyAfterCreate',
            'App\Listeners\WebhookAfterCreate',
        ],
        'App\Events\FormBeforeUpdate' => [
            'App\Listeners\WebhookBeforeUpdate',
        ],
        'App\Events\FormAfterUpdate' => [
            'App\Listeners\NotifyAfterUpdate',
            'App\Listeners\WebhookAfterUpdate',
        ],
        'App\Events\FormBeforeDelete' => [
            'App\Listeners\WebhookBeforeDelete',
        ],
        'App\Events\FormAfterDelete' => [
            'App\Listeners\NotifyAfterDelete',
            'App\Listeners\WebhookAfterDelete',
        ],
        'App\Events\FormBeforeSave' => [
            'App\Listeners\WebhookBeforeSave',
        ],
        'App\Events\FormAfterSave' => [
            'App\Listeners\NotifyAfterSave',
            'App\Listeners\WebhookAfterSave',
        ],
    ];

    /**
     * The subscriber classes to register.
     *
     * @var array
     */
    protected $subscribe = [
        'App\Listeners\UserEventSubscriber',
    ];

    /**
     * Register any other events for your application.
     *
     * @return void
     */
    public function boot()
    {
        parent::boot();
    }
}

錯誤：

當我運行命令時php artisan event:generate，出現以下錯誤：

PHP Fatal error:  Call to a member function listens() on null in /app/vendor/laravel/framework/src/Illuminate/Foundation/Console/EventGenerateCommand.php on line 35

                                                           
  [Symfony\Component\Debug\Exception\FatalErrorException]  
  Call to a member function listens() on null

根據檔案，它應該這樣做：

此命令將生成在您的 EventServiceProvider 中列出的任何事件或偵聽器。已經存在的事件和偵聽器將保持不變

我不明白我錯過了什么，因為我沒有通過搜索網路找到任何類似的錯誤

uj5u.com熱心網友回復：

這是回傳的行null：

$providers = $this->laravel->getProviders(EventServiceProvider::class);

因此，您的EventServiceProvider...存在一些問題，請嘗試使用：

<?php

namespace App\Providers;

use Illuminate\Support\Facades\Event;
use Illuminate\Auth\Events\Registered;
use Illuminate\Auth\Listeners\SendEmailVerificationNotification;
use Illuminate\Foundation\Support\Providers\EventServiceProvider as ServiceProvider;

class EventServiceProvider extends ServiceProvider
{
    /**
     * The event listener mappings for the application.
     *
     * @var array
     */
    protected $listen = [
        'App\Events\FormBeforeCreate' => [
            'App\Listeners\WebhookBeforeCreate',
        ],
        'App\Events\FormAfterCreate' => [
            'App\Listeners\NotifyAfterCreate',
            'App\Listeners\WebhookAfterCreate',
        ],
        'App\Events\FormBeforeUpdate' => [
            'App\Listeners\WebhookBeforeUpdate',
        ],
        'App\Events\FormAfterUpdate' => [
            'App\Listeners\NotifyAfterUpdate',
            'App\Listeners\WebhookAfterUpdate',
        ],
        'App\Events\FormBeforeDelete' => [
            'App\Listeners\WebhookBeforeDelete',
        ],
        'App\Events\FormAfterDelete' => [
            'App\Listeners\NotifyAfterDelete',
            'App\Listeners\WebhookAfterDelete',
        ],
        'App\Events\FormBeforeSave' => [
            'App\Listeners\WebhookBeforeSave',
        ],
        'App\Events\FormAfterSave' => [
            'App\Listeners\NotifyAfterSave',
            'App\Listeners\WebhookAfterSave',
        ],
    ];

    /**
     * Register any events for your application.
     *
     * @return void
     */
    public function boot()
    {
        parent::boot();

        //
    }
}

uj5u.com熱心網友回復：

我的不好，昨天晚上我好像真的很累，我們的專案在 Docker 上運行，我在 Docker 外部而不是內部運行命令。

我不知道為什么它會特別顯示這個錯誤，但是一旦我在 docker 中運行命令，所有檔案都會正確生成。

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