Laravel casted encrypted attributes

BaseModel.php

<?php

namespace App\Models;

use Crypt;
use Illuminate\Database\Eloquent\Model;

/**
 * This model implements a custom cast named (en)crypt. If a property is added to
 * the cast array with this type, the value will be automatically and transparently encrypted
 * on storage and decrypted on retrieval.
 * 
 * Implementing is as easy as adding the following property to an implementing model:
 * 
 *     protected $casts = [
 *         'my_awesome_secret_property' => 'crypt'
 *     ];
 * 
 */
class BaseModel extends Model
{
    /**
     * Cast an attribute to a native PHP type.
     *
     * @param  string  $key
     * @param  mixed  $value
     * @return mixed
     */
    protected function castAttribute($key, $value)
    {
        $castValue = parent::castAttribute($key, $value);

        if ($castValue == $value) {
            // check our additional cast options
            switch ($this->getCastType($key)) {
                case 'crypt':
                case 'encrypt':
                    return Crypt::decrypt($value);
                default:
                    return $value;
            }
        }

        return $castValue;
    }

    /**
     * Set a given attribute on the model.
     *
     * @param  string  $key
     * @param  mixed  $value
     * @return $this
     */
    public function setAttribute($key, $value)
    {
        parent::setAttribute($key, $value);

        if ($this->isEncryptable($key)) {
            $this->attributes[$key] = Crypt::encrypt($value);
        } else {
            $this->attributes[$key] = $value;
        }

        return $this;
    }

    /**
     * Check whether an attribute should be encrypted
     *
     * @param $key
     * @return bool
     */
    protected function isEncryptable($key)
    {
        return $this->hasCast($key, ['encrypt', 'crypt']);
    }
}