FEATURE REQUEST: Register Model Observers via Model property.

[trip-somers]

Typically, model observers are registered in a service provider or in the model itself via an overloaded boot() method that looks like this:

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

        self::observe(new DummyObserver);
    }

This request seems pretty obvious, so there's probably something that I've missed, but could the base boot() method be updated to call a bootObservers() method -- similar to the bootTraits() method -- that will process an $observers array property so that the above can be avoided and replaced with something that looks like this:

    protected $observers = [DummyObserver::class];

(I made it an array and plural since I can't recall if there's support or need for multiple observers on a single model. It can easily be singular if that makes the most sense.)

[browner12]

I believe this is possible already.

https://github.com/laravel/framework/blob/8.x/src/Illuminate/Database/Eloquent/Concerns/HasEvents.php

[trip-somers]

$observables appears to be for extending the standard model events, not registering observers.

If I am incorrect, would you please share a brief example?

[ecrmnn]

Bump.

Would definitely like to have this in the framework without having to use boot or booted.

Registering observers in the EventServiceProvider makes it harder to debug.

[pascalvgemert]

I created a trait called Observable which can be used on your models.

Example:

namespace App\Models\Traits;

use RuntimeException;

/**
 * @mixin \Illuminate\Database\Eloquent\Model
 */
trait Observable
{
    public static function bootObservable(): void
    {
        $baseName = class_basename(static::class);
        $observableClass = "\\App\\Observers\\{$baseName}Observer";

        if (! class_exists($observableClass)) {
            throw new RuntimeException("Observer class {$observableClass} does not exist.");
        }

        (new static())->registerObserver($observableClass);
    }
}

I will try to create a package for it somewhere next week.

[henzeb]

It's now possible to do this with PHP Attributes. https://laravel.com/docs/10.x/eloquent#observers