Question Updated

I am being try to find the discount amount which match the shopping cart rule based on product. I replicate the module 'Shopping Cart Price Rule' to another module which i want to create my discount rule under condition tab.My new module does not have coupon code.It has rule information and condition only.

So Here i want to get discount amount that matches my new module rule based on product details(product id, sku) with out coupon code.

 * Get rules collection for current object state
 * @return Mage_SalesRule_Model_Mysql4_Rule_Collection
protected function _getRules()
    $key = $this->getWebsiteId() . '_' . $this->getCustomerGroupId() . '_' . $this->getCouponCode();
    return $this->_rules[$key];

Here we dont use $this->getCouponCode() to find the rule match.

Before going to replicated module, i just want to know is it possible in shopping cart price rule module.

My question is , How do i find the discount amount based on product that matches shopping cart price rule with out giving coupon code ?

  • sorry this is not an answer but have you looked at stackoverflow.com/questions/13595296/… Apr 1, 2014 at 11:52
  • @DavidManners Is it possible to get shopping cart price rule from order ? Apr 1, 2014 at 13:55
  • maybe if you add your cart rule it would be easier to understand and help Apr 1, 2014 at 14:10
  • @DavidManners i need some thing like Mage_CatalogRule_Model_Resource_Rule::getRulesForProduct(). I just want to know the product matches shopping(or my new module) rule once it is added and return its discount amount Apr 1, 2014 at 14:16

1 Answer 1


I tried with external file,Given product id to find the matched sales rule conditions.



$pid = 53;
$_product= Mage::getModel('catalog/product')->load($pid);

$coll = Mage::getResourceModel('salesrule/rule_collection')->load();
foreach($coll as $rule){

 $quoteId = Mage::getSingleton('checkout/session')->getQuoteId(); 
 $real_quote = Mage::getSingleton('sales/quote')->load($quoteId);                
 $product = Mage::getModel('sales/quote_item')->setQuote($real_quote)->setProduct($_product);  
foreach($coll as $rule) 
    if ($rule->getConditions()->validate($product))  
       echo ':)';
       echo $rule->getData('discount_amount');
  • @DavidManners I almost came with one solution.Now i need to do the same with my replicated module. Apr 2, 2014 at 10:23
  • @DavidManners Actually, I use flag to filter salerule grid and my module rule grid.I have changed my new module based on salerule table now.To avoid more complexity i use magento salerule module to validate :) Apr 2, 2014 at 13:17
  • 1
    Great solution, Very helpful (y) Dec 19, 2017 at 9:01

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