working

PaymentMethodModel.php

<?php

namespace BlocksCommerce\Models;

use Blocks\AttributeType;
use Blocks\Blocks;

class PaymentMethodModel extends BaseModel
{
    public function __toString()
    {
        return $this->name;
    }

    public function defineAttributes()
    {
        return array(
            'id'      => AttributeType::Number,
            'name'    => AttributeType::String,
            'class'   => AttributeType::String,
            'enabled' => AttributeType::Bool,
            'config'  => array(AttributeType::String, 'column' => ColumnType::Text)
        );
    }

    public function beforeSave($event)
    {
        $this->serialize('config');
        parent::beforeSave();
    }

    public function afterSave($event)
    {
        $this->deserialize('config');
        parent::afterSave();
    }

    public function afterFind($event)
    {
        $this->deserialize('config');
        parent::afterFind();
    }


    private function deserialize($attribute)
    {
        $att = $this->getAttribute($attribute);
        if(!empty($att) && is_scalar($att)) {
            $a = @$this->jsonToArray($att);
            if($a !== false) {
                $this->setAttribute($attribute, $a);
            } else {
                $this->setAttribute($attribute, $this->arrayToJson(array()));
            }
        }
    }
    private function serialize($attribute)
    {
        $att = $this->getAttribute($attribute);
        if(is_array($att)){
            $this->setAttribute($attribute, $this->jsonToArray($att));
        }else{
            $this->setAttribute($attribute, $this->arrayToJson(array()));
        }
    }

    private function jsonToArray($json){
        return json_decode($json,true);
    }

    private function arrayToJson($array){
        return json_encode($array);
    }
}