我有一个Conversation
,可以将其设置为私有。设置为私有意味着user_id
上的conversations
将被分配一个非空值。如果用户拥有足够的积分,则可以将其设置为私人对话。
前端具有验证的逻辑,但是我也想在后端进行验证。
我将事件设置为在模型保存时触发:
protected $dispatchesEvents = [
'saving' => ConversationSaving::class,
];
该事件没什么特别的:
public function __construct(Conversation $conversation)
{
Log::info("[Event] " . get_class());
$this->conversation = $conversation;
}
事件服务提供者具有这样的逻辑约束:
ConversationSaving::class => [
PreventMakingPrivate::class
],
ConversationMadePrivate::class => [
DeductCreditsForMakingPrivate::class
],
想法是触发更新,如果更新失败,则永远不会触发ConversationMadePrivate
事件。
控制器看起来像这样:
$conversation->update(['user_id' => Auth::user()->id]);
Log::info('After update');
Log::info($conversation->user_id);
Log::info($conversation->user_id ? 't':'f');
if(!$conversation->user_id){
return response([
'error' => 'Error making private',
]);
}
event(new ConversationMadePrivate($conversation));
return response([
'conversation' => $conversation->load('messages'),
]);
现在我在日志中得到的是:
[2020-05-16 07:34:41] local.INFO: [Event] App\Events\ConversationSaving
[2020-05-16 07:34:41] local.INFO: [Listener] App\Listeners\PreventMakingPrivate
[2020-05-16 07:34:41] local.INFO: [Listener] Not enough credits
[2020-05-16 07:34:41] local.INFO: After update
[2020-05-16 07:34:41] local.INFO: 1
[2020-05-16 07:34:41] local.INFO: t
[2020-05-16 07:34:41] local.INFO: [Event] App\Events\ConversationMadePrivate
[2020-05-16 07:34:41] local.INFO: [Listener] App\Listeners\DeductCreditsForMakingPrivate
因此,代码正确地进入了侦听器并从false
返回了PreventMakingPrivate
,但是模型仍在更新。
我也尝试将Conversation
设置为updating
,而不是saving
,但是发生了同样的事情。
如何防止更新?
哦,我明白了。如果有人也需要它,则似乎update
方法成功返回1,否则不返回任何值。这解决了我的问题:
$response = $conversation->update(['user_id' => Auth::user()->id]);
if(!$response){
return response([
'error' => 'Error making private',
]);
}