Laravel: how to create a function After or Before save|update

Question

I need to generate a function to call after or before save() or update() but i don\'t know how to do. I think I need a callback from save() update() but I don\'t know how to

Answer 1

Inside your model, you can add a boot() method which will allow you to manage these events.

For example, having User.php model:

class User extends Model 
{

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

        self::creating(function($model){
            // ... code here
        });

        self::created(function($model){
            // ... code here
        });

        self::updating(function($model){
            // ... code here
        });

        self::updated(function($model){
            // ... code here
        });

        self::deleting(function($model){
            // ... code here
        });

        self::deleted(function($model){
            // ... code here
        });
    }

}

You can review all available events over here: https://laravel.com/docs/5.2/eloquent#events

Answer 2

Create a provider by using this command

php artisan make:provider ProviderClassName

then define the callbacks for models in boot function

Model::created(function($model){
  //Do you want to do
});

List of available callbacks:

Model::creating(function($model){});
Model::updated(function($model){});
Model::updating(function($model){});
Model::deleted(function($model){});
Model::deleting(function($model){});
Model::saving(function($model){});
Model::saved(function($model){});

Answer 3

This only works after an event happened on your model.

Create an observer for your model

php artisan make:observer UserObserver --model=User

this will create an event observer on your model

class UserObserver
{
    /**
     * Handle the User "created" event.
     *
     * @param  \App\Models\User  $user
     * @return void
     */
    public function created(User $user)
    {
        //
    }

    /**
     * Handle the User "updated" event.
     *
     * @param  \App\Models\User  $user
     * @return void
     */
    public function updated(User $user)
    {
        //
    }

    /**
     * Handle the User "deleted" event.
     *
     * @param  \App\Models\User  $user
     * @return void
     */
    public function deleted(User $user)
    {
        //
    }

    /**
     * Handle the User "forceDeleted" event.
     *
     * @param  \App\Models\User  $user
     * @return void
     */
    public function forceDeleted(User $user)
    {
        //
    }
}

You must register this observer in the boot method on one of your ServiceProviders preferably the AppServiceProvider

public function boot()
{
    User::observe(UserObserver::class);
}