Shopping Cart Price Rules – Stop Further Rule Processing Not Working

Product to catalog price rules data is stored in the table catalogrule_product In that table you will find the product_id field that relates back to your product.

You should be able to build a query that checks the table for the product in question.

Not 100% what your intended functionality would involve, but doing a separate query for each product to check if they have an ACTIVE rule applying to them would slow your cart display down a fair bit. It would thus be better to make one query with all the products IDS you are interested in, and then use the resulting collection data to work your magic.

In case it helps you get a query built, I include below some code that I use in my Dynamic Category Products Extension which finds all products with an active rule. You should be able to adjust this and limit it to your products ids alone. It also takes the date range of the rule into consideration. Remember to consider that rules can be of two possible types: BY_PERCENT or FIXED Some bits are out of context, but you should get the jest of it.

$category below is the current active category. $value is simply the value of the discount I am interested in. $operator is self explanatory ;)

$collection = $category->getProductCollection();
$value = $this->getValueParsed();
$operator = $this->_operatorMapToSql[$this->getOperator()]; 
$conditions = " (price_rule.product_id = e.entity_id) ";
if (strpos($value, '%') > 0) {
            $value = str_replace('%', '', $value);
            $conditions .= " AND action_operator = '" . Mage_SalesRule_Model_Rule::BY_PERCENT_ACTION . "' ";
        } else {
            $conditions .= " AND action_operator = '" . Mage_SalesRule_Model_Rule::BY_FIXED_ACTION . "' ";
        }
        $storeDate = Mage::app()->getLocale()->storeTimeStamp($this->getStoreId());
        $conditions .= " AND (from_time = 0
                    OR from_time <= " . $storeDate . ")
                    AND (to_time = 0
                    OR to_time >= " . $storeDate . ") ";
        $conditions .= " AND action_amount " . $operator . " " . $value;
        $collection->getSelect()->joinInner(
            array('price_rule' => $collection->getTable('catalogrule/rule_product')), $conditions
        );

I hope this get you closer to your solution

I think this could be because the _calculator is effectively stored as a singleton within the Mage_SalesRule_Model_Quote_Discount class, meaning that the second item to be processed will hit $this->_stopFurtherRules == true and bail.

My thought process is to store the ID of the $rule which is OK to be processed, allowing further items to process only this rule.

As per CE1.9.0.1 and EE1.14.0.1

Mage_SalesRule_Model_Validator line 316

- if ($this->_stopFurtherRules) {
+ if ($this->_stopFurtherRules !== false && $rule->getId() != $this->_stopFurtherRules) {

Mage_SalesRule_Model_Validator line 514

- $this->_stopFurtherRules = true;
+ $this->_stopFurtherRules = $rule->getId();

This is my proposed solution, I would be interested to hear reasons why this is a terrible idea!