I want to do a query to my product custom field when you press checkout
    function plgVmConfirmedOrder ($cart, $order) {
    $plugin = JPluginHelper::getPlugin('vmcustom', 'mi_plg');
    $pluginParams = new JRegistry();
    $pluginParams->loadString($plugin->params);
    $order_bt       = $order['items'];
    $user_id        = $order_bt->virtuemart_user_id;
    $order_number   = $order_bt->virtuemart_order_item_id;
    $db=JFactory::getDbo();
this foreach is when I get to enter the parameters I want //foreach ($atri as $key) {
        $q=$db->getQuery(true);
        $q->update('#__virtuemart_custom_plg_mi_plg_values');
        $q->set('state='.(int)$cero);
        $q->where('customsforall_value_id='.(int)$virtuemart_order_id);
        $db->setQuery($q);
            return false;
        }
    //}
    return true;
}
When you press checkout you delete the cart and the current prodcuts and its attributes i must to enter in the order but i cant. help my please
                        
Hi I'll put the answer in case someone else needs it:
we need to add a private variable in the beginning of our class vmcustom plugin that variable and assign our array with our custom fields and then call that variable from our function