konekt/enum-eloquent

Enum attribute casting for Eloquent models

1.6.0 2020-09-12 07:02 UTC

This package is auto-updated.

Last update: 2020-10-12 07:35:16 UTC


README

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This package provides support for auto casting konekt enum fields in Eloquent models.

Supported Konekt Enum versions are 2.0+ or 3.0+ and Eloquent 5.0+

Changelog

Installation

composer require konekt/enum-eloquent

Usage

  1. Add the CastsEnums trait to your model
  2. Define the attributes to be casted via the protected $enums property on the model

Example

The Enum:

namespace App;

use Konekt\Enum\Enum;

class OrderStatus extends Enum
{
    const __DEFAULT = self::PENDING; 
    // const __default = self::PENDING; // usage of default in v2.x 

    const PENDING   = 'pending';
    const CANCELLED = 'cancelled';
    const COMPLETED = 'completed';

}

The Model:

namespace App;

use Illuminate\Database\Eloquent\Model;
use Konekt\Enum\Eloquent\CastsEnums;

class Order extends Model
{
    use CastsEnums;

    protected $enums = [
        'status' => OrderStatus::class
    ];
}

Client code:

$order = Order::create([
    'status' => 'pending'
]);

// The status attribute will be an enum object:
echo get_class($order->status);
// output: App\OrderStatus

echo $order->status->value();
// output: 'pending'

echo $order->status->isPending() ? 'yes' : 'no';
// output: yes

echo $order->status->isCancelled() ? 'yes' : 'no';
// output: no

// You can assign an enum object as attribute value:
$order->status = OrderStatus::COMPLETED();
echo $order->status->value();
// output: 'completed'

// It also works with mass assignment:
$order = Order::create([
    'status' => OrderStatus::COMPLETED()    
]);

echo $order->status->value();
// output 'completed'

// It still accepts scalar values:
$order->status = 'completed';
echo $order->status->isCompleted() ? 'yes' : 'no';
// output: yes

// But it doesn't accept scalar values that aren't in the enum:
$order->status = 'negotiating';
// throws UnexpectedValueException
// Given value (negotiating) is not in enum `App\OrderStatus`

Resolving Enum Class Runtime

It is possible to defer the resolution of an Enum class to runtime.

It happens using the ClassName@method notation known from Laravel.

This is useful for libraries, so you can 'late-bind' the actual enum class and let the user to extend it.

Example

The Model:

namespace App;

use Illuminate\Database\Eloquent\Model;
use Konekt\Enum\Eloquent\CastsEnums;

class Order extends Model
{
    use CastsEnums;

    protected $enums = [
        'status' => 'OrderStatusResolver@enumClass'
    ];
}

The Resolver:

namespace App;

class OrderStatusResolver
{
    /**
     * Returns the enum class to use as order status enum
     *
     * @return string
     */
    public static function enumClass()
    {
        return config('app.order.status.class', OrderStatus::class);
    }
}

This way the enum class becomes configurable without the need to modify the Model code.

Laravel Collective Forms Compatibility

Laravel Collective Forms Package provides the Form facade known from Laravel v4.x.

In case you want to use the Forms package with this one, you need to add the EnumsAreCompatibleWithLaravelForms trait to your model, next to CastsEnums.

This will fix a problem where the forms package detects the enum label instead of its actual value as the value of the field.

It is being done by adding the (undocumented) getFormValue() method to the model, that is being used by the forms library to obtain form field value.

Enjoy!

For detailed usage of konekt enums refer to the Konekt Enum Documentation.