magento 2.3 get cart item related to applied cart rule

Question

Situation:

• There are 4 products in the cart
• One of these products causes a cart rule to apply

By getting the cart items via code, I need to be able to identify the one item that is causing the rule to apply.

My problem is that I cannot find a way to separate this item from the others in the cart, they all return the same results.

My code so far:

foreach($quote->getItems() as $quoteItem) {

$itemAppliedRulesId = $quoteItem->getAppliedRuleIds(); // I expect this to  give a result only for the one item that matches the cart rule, instead all the items returns the rule id

$product = $quoteItem->getProduct();
$result = $rule->getActions()->validate($product); // see comment above, same result

}

My question:

Is there a way I can get the items of the cart that cause one or more rules to apply?

Answer 1

Using: \Magento\SalesRule\Model\ResourceModel\Rule\CollectionFactory $collection.

retrieve all rules with:

$rules = $this->collection->create();

After you retrieve the collection you can loop through all rules and check if you could apply the rule for the current product:

/** @var \Magento\SalesRule\Model\Rule $rule */
    foreach ($rules as $rule) {
        try {
            if ($rule->getActions()->validate($product)) {
                $activeRules[] = $rule;
            }
        } catch (\Magento\Framework\Exception\NoSuchEntityException $e) {
            continue;
        }
    }

Answer 2

To check which product in cart has triggered the rule :

    /** @var \Magento\SalesRule\Model\Rule $rule */
    
    foreach($quote->getItems() as $quoteItem) 
    {
        $combineCondition = $rule->getConditions();
        if ($combineCondition->validateByEntityId($quoteItem->getProduct()->getId()))
        {
           //product has triggered the rule
        }
    }
        

Hope it helps