php - Opencart Shipping Method Required -

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i have created new shipping module based on post below

http://forum.opencart.com/viewtopic.php?f=142&t=30226

the shipping method checks members group user in, , if qualify free delivery based on cart price. works great, except when go checkout , select free shipping method comes error "warning: shipping method required!"

the model shipping below, can shed light on this?

<?php class modelshippingfreeusergroup extends model {     function getquote($address) {         $this->language->load('shipping/freeusergroup');          $customer_group_id = $this->customer->getcustomergroupid();         if ($customer_group_id < 1)$customer_group_id = 1;          $cart_total = $this->cart->gettotal();          $strquery = "select * " . db_prefix . "members_delivery " .              " price <= '" . $cart_total . "' , customer_group_id = '" . $customer_group_id . "' " .              " limit 1";         $query = $this->db->query($strquery);          //$shiparray = array();         $method_data = array();         if ($query->num_rows > 0)         {             foreach ($query->rows $result) {                 $quote_data['freeusergroup'] = array(                     'code'          => 'freeusergroup',                     'title'         =>  'free delivery',                     'cost'          =>  0.00,                     'tax_class_id'  => $this->config->get('weight_tax_class_id'),//0,                     'text'          => $this->currency->format(0.00)                 );                  $method_data = array(                     'code'          => 'freeusergroup',                     'title'         => 'free delivery',                     'quote'         => $quote_data,                     'sort_order'    => $this->config->get('freeusergroup_sort_order'),                     'error'         => false                 );             }         }         return $method_data;      } } ?>

i've managed fix it, didn't realize method data quote data required . in code, checking validate function on controller pointed me fact 'code' in quote data should 'freeusergroup.freeusergroup'

the first part of code taken method_data,


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