仅在更新模型属性/列时处理事件-Laravel Observer
我在这里处理模型的两个事件,更新和更新,正如您在下面的代码中看到的。我担心的是,我只想在teacherId已更改的情况下在更新的事件中执行某些任务,因此我想在更新事件中检查该值,并使用类属性来了解该值是否已更改,但该标志始终返回false(假定其已定义的值)仅在更新模型属性/列时处理事件-Laravel Observer,laravel,model,eloquent,observers,laravel-events,Laravel,Model,Eloquent,Observers,Laravel Events,我在这里处理模型的两个事件,更新和更新,正如您在下面的代码中看到的。我担心的是,我只想在teacherId已更改的情况下在更新的事件中执行某些任务,因此我想在更新事件中检查该值,并使用类属性来了解该值是否已更改,但该标志始终返回false(假定其已定义的值) namespace App\Observers; class SubjectObserver { private $shouldUpdateThreads = false; /** * Listen to the ThreadLis
namespace App\Observers;
class SubjectObserver {
private $shouldUpdateThreads = false;
/**
* Listen to the ThreadList created event.
* This events Fire when ThreadList is handled
* @param \App\Observers\App\ThreadList $threadList
*/
public function created(\subject $subject) {
}
/**
* Listen to the ThreadList saved event.
* @param \App\Observers\App\ThreadList $threadList
*/
public function saved(\subject $subject) {
}
/**
* Handling subject updated event
* Used to update the threads and related models
* @param \subject $subject
*/
public function updated(\subject $subject) {
info('After Update Event ' . $this->shouldUpdateThreads);
if ($this->shouldUpdateThreads) {
info_plus($subject);
}
info('After Update Check');
}
/**
* Handling subject being updated event
* Used to check if the teachers data has changed or not
* @param \subject $subject
*/
public function updating(\subject $_subject) {
$subject = \subject::find($_subject->id);
$this->shouldUpdateThreads = ($subject->teacherId != $_subject->teacherId) ? true : false;
info(($subject->teacherId != $_subject->teacherId));
info("Thread update ? " . $this->shouldUpdateThreads);
}
public function deleted(\subject $subject) {
info("Subject deleted");
}
}
这是正确的方法吗?如果不是,我做错了什么 在雄辩的模型中,更新属性时可以使用
getOriginal
方法。
因此,如果要获取teacherId
的原始值(更新前),可以执行以下操作:
$subject->getOriginal('teacher_id');
看
在代码中:
public function updated(\subject $subject) {
info('After Update Event ' . $this->shouldUpdateThreads);
if ($subject->getOriginal('teacher_id') !== $subject->teacher_id) {
info_plus($subject);
}
info('After Update Check');
}
酷,让我试试:)那对我来说似乎很好,谢谢