Modifying Product Final Price in Magento 2 Using the catalog_product_get_final_price Event

sales gp - February 20, 2025 3

Modifying Product Final Price in Magento 2 Using the catalog_product_get_final_price Event

Learn how to modify a product's final price in Magento 2 using the catalog_product_get_final_price event. This guide walks you through defining the event in events.xml, creating a custom observer, and dynamically adjusting product pricing.

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Modifying Product Final Price in Magento 2 Using the catalog_product_get_final_price Event

Modifying Product Final Price in Magento 2 Using the catalog_product_get_final_price Event

In Magento 2, you can adjust a product's final price by leveraging the catalog_product_get_final_price event. This event, located in the Magento\Catalog\Model\Product\Type\Price class, allows developers to modify product pricing dynamically.

Implementing the Price Modification Observer

To set a maximum product price, for instance, $100, follow these steps:

Define the Event in events.xml

Create the events.xml file in your module's etc/frontenddirectory:

<?xml version="1.0"?>

</event>

</config>

Create the Observer Class

Develop the observer class CustomPriceObserver.php in the Observer directory of your module:

<?php

namespace Vendor\Module\Observer;

use Magento\Framework\Event\Observer;

use Magento\Framework\Event\ObserverInterface;

class CustomPriceObserver implements ObserverInterface

{

public function execute(Observer $observer)

{

$product = $observer->getEvent()->getProduct();

$maxPrice = 100;

$finalPrice = min($product->getFinalPrice(), $maxPrice);

$product->setFinalPrice($finalPrice);

}

In this example, the observer checks if the product's final price exceeds $100. If it does, the price is set to $100; otherwise, the original price remains.

Considerations for API Usage

When working with REST or SOAP APIs, define events in the webapi_rest or webapi_soap areas of your module to ensure the events trigger correctly.

Additional Resources

For a comprehensive list of all events in Magento 2, refer to the official Magento documentation.

FAQs

How Can I Modify a Product's Final Price in Magento 2?

You can modify the final price by using the catalog_product_get_final_price event in Magento 2. This event allows dynamic price adjustments before displaying the final price to customers.

Where is the catalog_product_get_final_price Event Defined?

The event is defined in the Magento\Catalog\Model\Product\Type\Price class and is used to determine a product's final price.

How Do I Register the Event in My Custom Module?

Create an events.xml file inside your module's etc/frontend directory and register the event like this:


<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
    <event name="catalog_product_get_final_price">
        <observer name="custom_price_observer" instance="Vendor\Module\Observer\CustomPriceObserver" />
    </event>
</config>

How Can I Set a Maximum Product Price Using an Observer?

Create an observer class CustomPriceObserver.php in your module's Observer directory with the following code:


namespace Vendor\Module\Observer;

use Magento\Framework\Event\Observer;
use Magento\Framework\Event\ObserverInterface;

class CustomPriceObserver implements ObserverInterface
{
    public function execute(Observer $observer)
    {
        $product = $observer->getEvent()->getProduct();
        $maxPrice = 100;
        $finalPrice = min($product->getFinalPrice(), $maxPrice);
        $product->setFinalPrice($finalPrice);
    }
}

Will This Observer Restrict Prices Above the Set Limit?

Yes, the observer checks if the product's final price exceeds $100. If it does, it sets the price to $100. If the price is below $100, it remains unchanged.

Do I Need to Modify Anything for API Requests?

Yes, if you're using REST or SOAP APIs, ensure the event is registered in the webapi_rest or webapi_soap areas of your module to trigger properly.

Should I Clear Cache After Implementing These Changes?

Yes, after modifying the event, run the following command to clear the cache: