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Override and adding extra field for combination

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Hello, I'm override a Combination class and adding an extra field for that. To do this I Create a new class on override/classes/Combination.php and create my necessary methods like this:


class Combination extends CombinationCore
    public $commission;

    public function __construct()

    public function addCommissionField()
        parent::$definition['fields']['commission'] = array(
            'type' => self::TYPE_FLOAT, 
            'validate' => 'isGenericName', 
            'required' => false, 
            'size' => 10

For this time this work better. Another featured, is a field for that.


But when I save the combination, this field is not save on database. I debug The Object model in this point:

	public function __construct($id = null, $id_lang = null, $id_shop = null)
		if (!ObjectModel::$db)
			ObjectModel::$db = Db::getInstance();

		$this->def = ObjectModel::getDefinition($this);
                // debut it

And the new field not exists on this point. Someone can help to understand? My prestashop is 1.6

Edited by williamespindola (see edit history)
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Nemo1 in this case the problem is not this. To do what I needed is necessary overrate tree classes: Combination.php, Product.php, AdminProductsController.php and a lot of methods, a very sad job. 


Hi Williame,


Can you give me the solution please..?

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