Show Product with Custom Price in Magento 2

Question

I'm trying to update/override the product price using the code below.

frontend/di.xml file

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">

    <type name="Magento\Catalog\Model\Product">
        <plugin name="change_product" type="ABCSolutions\ProductTab\Plugin\Model\Product" sortOrder="1" />
    </type>

</config>

And the Product.php file code

<?php
namespace ABCSolutions\ProductTab\Plugin\Model;

class Product
{

    public function afterGetPrice(\Magento\Catalog\Model\Product $subject, $result)
    {
        if($subject->getSku() == 'B2BTest'){
            $result += 10;
        }
        return $result;
    }

}

It is applied when the product does not have Tier Prices as shown below. The product cost is 10 and I added 10 so it is 20.

But when configuring tier prices, Magento overrides the price to show as tier price as the final price. In this case, the above code is not working.

So, I tried to override the \Magento\Catalog\Pricing\Render\FinalPriceBox class of wrapResult() method. When I debug the code the calculation is already done somewhere.

So, which file should override to calculate and apply or apply custom price?

I customized the afterGetPrice method and set the price based on the BC API call. And this is working without tier and special price. So which method should we override to set the custom price if tier and special prices are configured?

We are using this logic/setting price for only the product page, not for any other pages. So, we believe it will not cause any issues.

Answer 1

To solve this, you need to create a plugin for the getFinalPrice method instead of getPrice. The getFinalPrice method is responsible for calculating the final price of a product, taking into account all types of discounts, including tier prices.

<?php
namespace ABCSolutions\ProductTab\Plugin\Model;

class Product
{
    public function afterGetFinalPrice(\Magento\Catalog\Model\Product $subject, $result)
    {
        if($subject->getSku() == '24-MB03'){
            $result += 4;
        }
        return $result;
    }
}

Here, we're using an after plugin (afterGetFinalPrice) which allows us to interact with the result of the getFinalPrice method after it's returned. This should work even when tier prices are set.

Reference : vendor/magento/module-catalog/Model/Product.php

---

Update:

This will add your custom price to the price when you add to the cart the product and it will reflect at all places in the cart, quote, checkout, etc.

For finalPriceBox You need to override the below file which will show the price as per your customization to the front user.

For time-saving I have added to the core files directly to show case your demo. So, Please override it and then do customization once you are satisfied with the result.

File : vendor/magento/module-catalog/Pricing/Price/TierPrice.php

Function: getStoredTierPrices()

protected function getStoredTierPrices()
{
    if (null === $this->rawPriceList) {
        $this->rawPriceList = $this->product->getData(self::PRICE_CODE);
        if (null === $this->rawPriceList || !is_array($this->rawPriceList)) {
            /** @var \Magento\Eav\Model\Entity\Attribute\AbstractAttribute $attribute */
            $attribute = $this->product->getResource()->getAttribute(self::PRICE_CODE);
            if ($attribute) {
                $attribute->getBackend()->afterLoad($this->product);
                $this->rawPriceList = $this->product->getData(self::PRICE_CODE);
            }
        }
        if (null === $this->rawPriceList || !is_array($this->rawPriceList)) {
            $this->rawPriceList = [];
        }
        if (!$this->isPercentageDiscount()) {
            foreach ($this->rawPriceList as $index => $rawPrice) {
                if (isset($rawPrice['price'])) {

                    //Your required logic goes here
                    if ($this->product->getSku() == '24-MB03') {
                        $rawPrice['price'] += 4;
                    }
                    //Your required logic goes here - End

                    $this->rawPriceList[$index]['price'] =
                        $this->priceCurrency->convertAndRound($rawPrice['price']);
                }
                if (isset($rawPrice['website_price'])) {
                    $this->rawPriceList[$index]['website_price'] =
                        $this->priceCurrency->convertAndRound($rawPrice['website_price']);
                }
            }
        }
    }
    return $this->rawPriceList;
}

The getStoredTierPrices() function in PHP retrieves the tier prices associated with a product from the database. You can override it and update as per requirement.

I have tested it in my Magento 2.4.6 setup.

Configured Tier Price

Before fulfilling the pricing criteria and before adding to the cart

After adding a Product with 100 Quantities which will consider tier-price

Cart Page

Please do not forget to flush the cache while testing, as the page is being cached and not calling this function every time.

Answer 2

If you have to change the prices for a group of customers, then you are going about this process wrong (I am saying this as you are setting b2b price). This would generate quite some issues and mostly related to caching.

You should be setting tier prices instead of custom price or plugin on getFinalPrice(). This is because the cache in Magento is segmented based on tier price, so each tier has it's own copy in the cache storage.

Also, you should be setting prices in cron or any background process so it doesn't have to be set over and over again when customer asks for price.

Answer 3

To override the product price including tier pricing in Magento 2, you need to target the correct price calculation logic. The afterGetPrice method doesn't handle tier pricing. Instead, you can override the getFinalPrice method, which considers all price rules including tier prices.

Here is how to update your plugin:

frontend/di.xml:

    <?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="Magento\Catalog\Model\Product">
        <plugin name="change_product_final_price" type="ABCSolutions\ProductTab\Plugin\Model\Product" sortOrder="1" />
    </type>
</config>

Product.php:

     <?php
namespace ABCSolutions\ProductTab\Plugin\Model;

class Product
{
    public function afterGetFinalPrice(\Magento\Catalog\Model\Product $subject, $result)
    {
        if ($subject->getSku() == 'B2BTest') {
            $result += 10;
        }
        return $result;
    }
}

di.xml: Defines a plugin for the Magento\Catalog\Model\Product class. Product.php: Implements the afterGetFinalPrice method to add your custom price logic after the final price is calculated, ensuring it applies regardless of tier pricing.

This approach ensures that your price adjustment is included in the final price calculation, which includes tier pricing logic. If you still encounter issues, consider debugging getFinalPrice in Magento\Catalog\Model\Product to understand the exact flow and ensure your changes take effect as expected.

Answer 4

di.xml: Create the di.xml file in the app/code/Vendor/Module/etc directory. xml

<?xml version="1.0"?> <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd"> <type name="Magento\Catalog\Model\Product"> <plugin name="custom_price_plugin" type="Vendor\Module\Plugin\ProductPlugin" /> </type> </config>

ProductPlugin.php: Create the ProductPlugin.php file in theapp/code/Vendor/Module/Plugin directory. php

<?php namespace Vendor\Module\Plugin; use Magento\Catalog\Model\Product; class ProductPlugin { /** * @param Product $subject * @param float $result * @return float */ public function afterGetPrice(Product $subject, $result) { // Modify the price as needed $customPrice = $result + 10; // Example: add 10 to the original price return $customPrice; } }

Try This Method