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Opencart : Extend Core Classes

Updated 19 August 2013



Opencart : Extend Core Classes using factory Design Pattern  –  if you are writing modules in opencart over riding of the classes are really pain in the ass . unlike magento opencart does not support observers designer pattern so every time you need to replace opencart core files thats is really a bad module design practice . Fortunately there are two methods available for extending core classes


2 –  Override Engine

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at webkul we are using override engine and its fairly easy to use and no uses of xmls like in vqmod .

Example – suppose that you want a custom sql query in your catalog model catalog/model/account/customer.php file like this

$this->db->query("UPDATE " . DB_PREFIX . "customer SET address_id = '" . (int)$address_id . "
', newfield = 1 WHERE customer_id = '" . (int)$customer_id . "'");

Then by using override engine it can easily achievable

class myaddon_ModelAccountCustomer extends ModelAccountCustomer {

   public function addCustomer($data) {

      // also add the newfield to the customer record
      $sql  = "UPDATE `".DB_PREFIX."customer` SET newfield = '".$data['newfield']."' ";
      $sql .= "WHERE email = '".$data['email']."'";
      $this->db->query( $sql );

and many more . enjoy the Php factory design pattern 🙂


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