The clear description is, an API with the post method updates a value of a model property. how I can set up a listener in Laravel that after every change by API, run an event for example send email or sms?
If you were wanting to create an event when any update happened you could easily just do this via the boot.
class SomeModel extends Model
{
public static function boot()
{
static::updated(function ($model) {
// send your email/sms
});
parent::boot();
}
}
However this would trigger when ever the model is updated, Since you only want this when you are updating via the API you would want to create a custom event and trigger it via dispatch in your api route/controller.
https://laravel.com/docs/8.x/events#dispatching-events
Related
I am using laravel created event. I want to use newly created id in another table. But when i print created object, i don't get the id property. How can i get newly created id in created event.
This is my code.
public static function booted()
{
static::created(function ($agentTask)
{
echo $agentTask->id;
print_r($agentTask);
});
}
echo statement printing null. and when i print $agentTask object, i don't find id anywhere.
it should be boot not booted
public static function boot()
booted is used to perform any actions required after the model boots.
while boot is used to bootstrap the model and its traits.
Laravel API DOC: booted() boot()
I'd like to delete a specific model from the cache using its id. This works as expected in the controller, but not using the model closure.
What I have in App\Models\Post:
use Illuminate\Support\Facades\Cache;
protected static function booted()
{
static::updated(function ($post) {
Cache::forget('post:'.$post->id);
});
}
If I do Cache::forget('post:'.$post->id); in the controller it works.
Something I'm missing?
Make sure that you are actually changing a value on your model, because the updated event only fires when the model was dirty, as you can see here.
The saved event however will fire whenever you call the save() method, as you can see here:
protected static function booted()
{
static::saved(function ($post) {
Cache::forget('post:'.$post->id);
});
}
From the docs:
The retrieved event will fire when an existing model is retrieved from
the database. When a new model is saved for the first time, the
creating and created events will fire. If a model already existed in
the database and the save method is called, the updating / updated
events will fire. However, in both cases, the saving / saved events
will fire.
I have one query, I want to delete the image from the server when particular resource get deleted from Nova.
can anyone suggest me is there any way to override delete method for the resource.
EDIT: How to hook into the delete event for a resource in laravel nova?
Note: I know we can do using observer. but I am looking for another
way.
In order to hook into laravel nova's delete resource event, you don't have a builtin way. But the parent model's have a delete method, you can override it and do extra work there
//app/ParentModel.php
public function delete() {
/* add your extra logic for deleted model */
parent::delete();
}
you can use boot in your model like this:
public static function boot()
{
parent::boot();
self::deleted(function ($model) {
parent::remove($model, self::$index);
});
}
I used Observers and deleted function Nova Resource Events and works fine
I want to have an event listener binding with a model event updating.
For instance, after a post is updated, there's an alert notifying the updated post title, how to write an event listener to have the notifying (with the post title value passing to the listener?
This post:
http://driesvints.com/blog/using-laravel-4-model-events/
Shows you how to set up event listeners using the "boot()" static function inside the model:
class Post extends eloquent {
public static function boot()
{
parent::boot();
static::creating(function($post)
{
$post->created_by = Auth::user()->id;
$post->updated_by = Auth::user()->id;
});
static::updating(function($post)
{
$post->updated_by = Auth::user()->id;
});
}
}
The list of events that #phill-sparks shared in his answer can be applied to individual modules.
The documentation briefly mentions Model Events. They've all got a helper function on the model so you don't need to know how they're constructed.
Eloquent models fire several events, allowing you to hook into various points in the model's lifecycle using the following methods: creating, created, updating, updated, saving, saved, deleting, deleted. If false is returned from the creating, updating, saving or deleting events, the action will be cancelled.
Project::creating(function($project) { }); // *
Project::created(function($project) { });
Project::updating(function($project) { }); // *
Project::updated(function($project) { });
Project::saving(function($project) { }); // *
Project::saved(function($project) { });
Project::deleting(function($project) { }); // *
Project::deleted(function($project) { });
If you return false from the functions marked * then they will cancel the operation.
For more detail, you can look through Illuminate/Database/Eloquent/Model and you will find all the events in there, look for uses of static::registerModelEvent and $this->fireModelEvent.
Events on Eloquent models are structured as eloquent.{$event}: {$class} and pass the model instance as a parameter.
I got stuck on this because I assumed subscribing to default model events like Event:listen('user.created',function($user) would have worked (as I said in a comment). So far I've seen these options work in the example of the default model user created event:
//This will work in general, but not in the start.php file
User::created(function($user)....
//this will work in the start.php file
Event::listen('eloquent.created: User', function($user)....
Event::listen('eloquent.created: ModelName', function(ModelName $model) {
//...
})
I made the authorization and authentication via facebook like here:
http://symfony.com/doc/current/cookbook/security/custom_authentication_provider.html
and it works
Now I want to make my own event, this event will do something when the user authenticates using facebook. For example-will redirect the user to the home page.
I did it like this
http://symfony.com/doc/current/components/event_dispatcher/introduction.html
So I have this class
http://pastebin.com/2FTndtL4
I do not know how to implement it, what am I supposed to pass as an argument to the constructor
It's really simple. Symfony 2 event system is powerful, and service tags will do the job.
Inject the dispatcher into the class where you want to fire the event. The service id is event_dispatcher;
Fire the event with $this->dispatcher->dispatch('facebook.post_auth', new FilterFacebookEvent($args)) when needed;
Make a service that implements EventSubscriberInterface, defining a static getSubscribedEvents() method. Of course you want to listen to facebook.post_auth event.
So your static method will look like:
static public function getSubscribedEvents()
{
return array(
'facebook.post_auth' => 'onPostAuthentication'
);
}
public function onPostAuthentication(FilterFacebookEvent $event)
{
// Do something, get the event args, etc
}
Finally register this service as a subscriber for the dispatcher: give it a tag (eg. facebook.event_subscriber), then make a RegisterFacebookEventsSubscribersPass (see this tutorial). You compiler pass should retrieve all tagged services and inside the loop should call:
$dispatcher = $container->getDefinition('event_dispatcher');
$subscribers = $container->findTaggedServiceIds('facebook.event_subscriber');
foreach($subscribers as $id => $attributes) {
$definition->addMethodCall('addSubscriber', array(new Reference($id)));
}
This way you can quick make a subscriber (for logging, for example) simply tagging your service.
Event object is just some kind of state/data storage. It keeps data that can be useful for dispatching some kind of events via Subscribers and/or Listeners. So, for example, if you wanna pass facebook id to your Listener(s) - Event is the right way of storing it. Also event is the return value of dispatcher. If you want to return some data from your Listener/Subscriber - you can also store it in Event object.