Yes it is possible.

More information can be viewed here: https://laracasts.com/lessons/model-events

Eloquent models already fire a bunch of events.

Additionally you can create custom events.

Yes, but can we create custom model-events? or only custom events?

Correct me if I don't be mistaken.

I found in the Model.php the following sentences:

    /**
 * Get the observable event names.
 *
 * @return array
 */
public function getObservableEvents()
{
	return array_merge(
		array(
			'creating', 'created', 'updating', 'updated',
			'deleting', 'deleted', 'saving', 'saved',
			'restoring', 'restored',
		),
		$this->observables
	);
}

And later the custom creating, created, and several other methods:

     /**
 * Register a creating model event with the dispatcher.
 *
 * @param  \Closure|string  $callback
 * @return void
 */
public static function creating($callback)
{
	static::registerModelEvent('creating', $callback);
}

Is correct to add to the array of events observables the new event and later define the custom event method with its callback?

Is anybody know another method to define it, please tell me.

Thanks in advanced

Can you give an example of an model-event you would like to fire.

I have two custom Models:

-User
-Courses

By example I like to fire custom events as follow:

User::course_adding

User::course_added

Course::user_adding

Course::user_added

... another custom events

Thanks for your replies.

Still unclear. It would be helpful if you can just explain for what action do you want to fire event.

Like : I want to fire an event named user.signup whenever a new user signs up to my website.

I want to fire and event called Course.userAdded when a course have a user added to its user list.

Imagine that you have a Users table and a Course tables, and you have a courses_users table to list the courses and the users registered within.

When you add an users to the Courses I like to fire this custom event course.user_added.

I know that I could use the course::updating o course::updated but I like to create custom events ad hoc.

Many thanks.

But only a question, When you are firing a creating event of a Sale Model by example, and this Sale creation is based on a Item Model and a User Model, is not aproximate to my question?

You can simply create event with model,Here is simple example : https://hdtuto.com/article/how-to-create-events-for-created-updated-deleted-model-task-in-laravel-5

You want to see it in observers to make it more reusable and single-responsible, although the starting point will be equally:

public function boot()

{

self::updated(function ($model) {

    if (array_key_exists('category_id', $model->getDirty())) {

        // Log things here

    }

});

}

Laravel will create a 'dirty' array that includes modified fields. You can find out that a specific area has changed using this.

You also have:

$model->getOriginal('field_name') // for this field value (originally)

$model->getOriginal() // for all original field values

new event 'viewed':

use Illuminate\Database\Eloquent\Model;

class History extends Model 
{
    public function getObservableEvents()
    {
        return array_merge(
            parent::getObservableEvents(),
            ['viewed']
        );
    }

    public static function viewed($callback)
    {
        static::registerModelEvent('viewed', $callback);
    }

    protected static function boot(){
        parent::boot();

        static::viewed(function($model)
        {
            dd($model);
        });
    }
}

fire event

event("eloquent.viewed: " . \get_class($model), $model);