我有一个可能设置为私有的Conversation
。设置为 private 意味着conversations
上的user_id
将被分配一个非 null 值。如果用户有足够的积分,则可以将对话设置为私人。
前端保存验证逻辑,但是我也想在后端进行验证。
我已将事件设置为在模型保存时触发:
protected $dispatchesEvents = [
'saving' => ConversationSaving::class,
];
那个事件没什么特别的:
public function __construct(Conversation $conversation)
{
Log::info("[Event] " . get_class());
$this->conversation = $conversation;
}
事件服务提供程序的逻辑捆绑如下:
ConversationSaving::class => [
PreventMakingPrivate::class
],
ConversationMadePrivate::class => [
DeductCreditsForMakingPrivate::class
],
这个想法是触发更新,如果更新失败,ConversationMadePrivate
事件永远不会触发。
控制器如下所示:
$conversation->update(['user_id' => Auth::user()->id]);
Log::info('After update');
Log::info($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] AppEventsConversationSaving
[2020-05-16 07:34:41] local.INFO: [Listener] AppListenersPreventMakingPrivate
[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] AppEventsConversationMadePrivate
[2020-05-16 07:34:41] local.INFO: [Listener] AppListenersDeductCreditsForMakingPrivate
因此,代码正确进入侦听器并从PreventMakingPrivate
返回false
,但是模型仍然更新。
我也尝试设置Conversation
updating
而不是saving
,但同样的事情发生了。
如何阻止更新?
哦,我知道了。如果有人也需要它,看起来update
方法在成功时会返回 1,否则什么都没有。这解决了我的问题:
$response = $conversation->update(['user_id' => Auth::user()->id]);
if(!$response){
return response([
'error' => 'Error making private',
]);
}