Magento 2 add product to cart with custom price

Magento 2 add product to cart with custom price is very necessary for developer when building Magento extensions or doing projects in magento 2 because some time you want to custom price for separate Products .

In order to add product to cart with custom price, You have to do 3 tasks :
– Create Simple Extension
– Declare event
– Create function Custom Price

1. Create Simple Extension

In order to add product to cart with custom price, you should use extension to do that because you can enable ,disable , remove or use for other website. you can check more Magento 2 how to custom module to create new module .

2. Declare event

In order declare event , you will push code to app/code/Vendor/ModuleName/etc/evetns.xml , you can check more detail how to use event in this post.

<?xml version="1.0"?>
<config xmlns:xsi="" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
    <event name="{eventName}">
        <observer name="{CustomEventName}" instance="Vendor\ModuleName\Observer\Actions" />

For my example , We will create event like that

<?xml version="1.0"?>
<config xmlns:xsi="" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
    <event name="checkout_cart_product_add_after">
        <observer name="magebay_custom_price" instance="Magebay\Hello\Observer\CustomPrice" />

3. Create function Custom Price

As you can see, I define function in Magebay/Hello/Observer/CustomPrice show now I will create function custom price

 * Created by PhpStorm.
 * User: maiuoc
 * Date: 2019-02-12
 * Time: 8:26 AM

namespace Magebay\Hello\Observer;
use Magento\Framework\Event\Observer as EventObserver;
use Magento\Framework\Event\ObserverInterface;

class CustomPrice implements ObserverInterface
    function execute(EventObserver $observer)
        /** @var \Magento\Quote\Model\Quote\Item $item*/
        $item = $observer->getData('quote_item');
        $item = ($item->getParentItem() ? $item->getParentItem() : $item);
        /** @var \Magento\Catalog\Model\Product $_product*/
        $_product = $observer->getEvent()->getData('product');
        $customPrice = $_product->getFinalPrice() + 10; // custom price
        // Enable super mode on the product.

Clear Cache and add product to cart , you will price will be changed .

Magento 2 add product to cart with custom price

As you can see, We can create a lot of custom function in magneto , We are having a lot of great extensions like Booking System Pro, Online product designer… that use a lot of custom functions, you if have any ideas about custom separate products , you can contact with us. We can check and do the tasks for you.