Advanced State Support for Laravel Models

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Advanced State Support for Laravel Models image

Laravel Model States is a Spatie package by Brent Roose that adds advanced state support to Laravel models.

For full details on this package, read the official documentation; however, we will provide a few examples from the readme here to give you an idea what this package provides:

Here’s an example from the readme of a Payment model and how you’d define a state for this model using this package:

use Spatie\ModelStates\HasStates;
 
/**
* @property \App\States\PaymentState state
*/
class Payment extends Model
{
use HasStates;
 
protected function registerStates(): void
{
$this
->addState('state', PaymentState::class)
->allowTransition(Pending::class, Paid::class)
->allowTransition(Pending::class, Failed::class, PendingToFailed::class);
}
}

The PaymentState in the example above is defined as follows:

// The abstract PaymentState class
use Spatie\ModelStates\State;
 
abstract class PaymentState extends State
{
abstract public function color(): string;
}
 
// The "paid" state for the Payment model
class Paid extends PaymentState
{
public function color(): string
{
return 'green';
}
}

And finally here’s an example of transitioning the state:

$payment = Payment::find(1);
 
$payment->state->transitionTo(Paid::class);
 
echo $payment->state->color();

According to the package readme, it combines the concepts from the state pattern and state machines—you should be familiar with these concepts before using this package. The video State Pattern – Design Patterns (ep 17) is an excellent resource for understanding the basics of state machines.

To learn more about this package, view the source code on GitHub at spatie/laravel-model-states and read the model states documenation.

This package was submitted to our Laravel News Links section. This section is a place the community can post packages and tutorials around the Laravel ecosystem. Follow along on Twitter @LaravelLinks

Paul Redmond photo

Staff writer at Laravel News. Full stack web developer and author.

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