I want to pass my `custom_price` changed via jQuery to my Observer in Magento 2 to have the correct price in my cart.
**My /Observer/CustomPrice.php:**
<?php
namespace Vendor_Name\Module_Name\Observer;
use Magento\Framework\Event\ObserverInterface;
use Magento\Framework\App\RequestInterface;
class CustomPrice implements ObserverInterface
{
public function execute(\Magento\Framework\Event\Observer $observer) {
$item = $observer->getEvent()->getData('quote_item');
$item = ( $item->getParentItem() ? $item->getParentItem() : $item );
$price = 123; // CUSTOM_PRICE variable HERE instead of "123"
$item->setCustomPrice($price);
$item->setOriginalCustomPrice($price);
$item->getProduct()->setIsSuperMode(true);
}
}
?>
**Excerpt of my JS script /view/frontend/web/product.js:**
require([ 'jquery'], function($){
$(document).ready(function () {
//... price calculations
custom_price = price + product_attribute_value
$("#custom_price").html(custom_price);
};
};
**Edit for completion: My etc/frontend/events.xml:**
<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
<event name="checkout_cart_product_add_after">
<observer name="customprice" instance="Vendor_Name\Module_Name\Observer\CustomPrice" />
</event>
</config>
My question is: How to **replace** the **"123"** value within the observer with my **"custom_price"** value from the jQuery calculations? (I know this is not the safest way to build up this thing on client site, but it should be fine since every price is getting checked manually after customer checkout).
**Further comments:**
1. The Observer is working fine with "123"
2. Using Magento 2.1.3
I also have a working extension for Magento 2.1 which does this without any Observer (only `Controller/Cart/Add.php`). I have still no clue how this is possible - trying to learn M2. After my update to 2.1.3 the functionality stopped working. An observer seems to be the right way to go for me. What do you think?
----------
**First attempt on Khoas answer:** (Thanks for the fast reply!)
---------------------------------------------------------------
**My /view/frontend/templates/block.phtml:**
<form>
<input type="hidden" name="custom_price" value="" id="custom_price_cal">
</form>
**Excerpt of my JS Script /view/frontend/web/product.js:**
require([ 'jquery'], function($){
$(document).ready(function () {
//... price calculations
var price = 90;
var product_attribute_value = 430;
custom_price = price + product_attribute_value;
console.log(custom_price);
$('#custom_price_cal').val(custom_price);
});
});
**My /Observer/CustomPrice.php:**
<?php
namespace Vendor_Name\Module_Name\Observer;
use Magento\Framework\Event\ObserverInterface;
use Magento\Framework\App\RequestInterface;
class CustomPrice implements ObserverInterface
{
public function __construct(
\Magento\Framework\App\RequestInterface $request
)
{
$this->_request = $request;
}
public function execute(\Magento\Framework\Event\Observer $observer) {
$item = $observer->getEvent()->getData('quote_item');
$item = ( $item->getParentItem() ? $item->getParentItem() : $item );
$price = $this->_request->getParam('custom_price');
$item->setCustomPrice($price);
$item->setOriginalCustomPrice($price);
$item->getProduct()->setIsSuperMode(true);
}
}
?>
Making these changes the custom_price does not appear in cart right now. What am I missing out?
----------
My /Controller/Cart/Add.php (how it has worked in 2.1)
<?php
/**
*
* Copyright © 2016 Magento. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Vendor_Name\Module_Name\Controller\Cart;
use Magento\Catalog\Api\ProductRepositoryInterface;
use Magento\Checkout\Model\Cart as CustomerCart;
use Magento\Framework\Exception\NoSuchEntityException;
/**
* @SuppressWarnings(PHPMD.CouplingBetweenObjects)
*/
class Add extends \Magento\Checkout\Controller\Cart
{
/**
* @var ProductRepositoryInterface
*/
protected $productRepository;
/**
* @param \Magento\Framework\App\Action\Context $context
* @param \Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig
* @param \Magento\Checkout\Model\Session $checkoutSession
* @param \Magento\Store\Model\StoreManagerInterface $storeManager
* @param \Magento\Framework\Data\Form\FormKey\Validator $formKeyValidator
* @param CustomerCart $cart
* @param ProductRepositoryInterface $productRepository
* @codeCoverageIgnore
*/
public function __construct(
\Magento\Framework\App\Action\Context $context,
\Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig,
\Magento\Checkout\Model\Session $checkoutSession,
\Magento\Store\Model\StoreManagerInterface $storeManager,
\Magento\Framework\Data\Form\FormKey\Validator $formKeyValidator,
CustomerCart $cart,
ProductRepositoryInterface $productRepository
) {
parent::__construct(
$context,
$scopeConfig,
$checkoutSession,
$storeManager,
$formKeyValidator,
$cart
);
$this->productRepository = $productRepository;
}
/**
* Initialize product instance from request data
*
* @return \Magento\Catalog\Model\Product|false
*/
protected function _initProduct()
{
$productId = (int)$this->getRequest()->getParam('product');
if ($productId) {
$storeId = $this->_objectManager->get('Magento\Store\Model\StoreManagerInterface')->getStore()->getId();
try {
return $this->productRepository->getById($productId, false, $storeId);
} catch (NoSuchEntityException $e) {
return false;
}
}
return false;
}
/**
* Add product to shopping cart action
*
* @return \Magento\Framework\Controller\Result\Redirect
* @SuppressWarnings(PHPMD.CyclomaticComplexity)
*/
public function execute()
{
if (!$this->_formKeyValidator->validate($this->getRequest())) {
return $this->resultRedirectFactory->create()->setPath('*/*/');
}
$params = $this->getRequest()->getParams();
$params['custom_price']= $params['custom_final_price'];
try {
if (isset($params['qty'])) {
$filter = new \Zend_Filter_LocalizedToNormalized(
['locale' => $this->_objectManager->get('Magento\Framework\Locale\ResolverInterface')->getLocale()]
);
$params['qty'] = $filter->filter($params['qty']);
}
$product = $this->_initProduct();
$related = $this->getRequest()->getParam('related_product');
/**
* Check product availability
*/
if (!$product) {
return $this->goBack();
}
$this->cart->addProduct($product, $params);
if (!empty($related)) {
$this->cart->addProductsByIds(explode(',', $related));
}
$this->cart->save();
/**
* @todo remove wishlist observer \Magento\Wishlist\Observer\AddToCart
*/
$this->_eventManager->dispatch(
'checkout_cart_add_product_complete',
['product' => $product, 'request' => $this->getRequest(), 'response' => $this->getResponse()]
);
if (!$this->_checkoutSession->getNoCartRedirect(true)) {
if (!$this->cart->getQuote()->getHasError()) {
$message = __(
'You added %1 to your shopping cart.',
$product->getName()
);
$this->messageManager->addSuccessMessage($message);
}
return $this->goBack(null, $product);
}
} catch (\Magento\Framework\Exception\LocalizedException $e) {
if ($this->_checkoutSession->getUseNotice(true)) {
$this->messageManager->addNotice(
$this->_objectManager->get('Magento\Framework\Escaper')->escapeHtml($e->getMessage())
);
} else {
$messages = array_unique(explode("\n", $e->getMessage()));
foreach ($messages as $message) {
$this->messageManager->addError(
$this->_objectManager->get('Magento\Framework\Escaper')->escapeHtml($message)
);
}
}
$url = $this->_checkoutSession->getRedirectUrl(true);
if (!$url) {
$cartUrl = $this->_objectManager->get('Magento\Checkout\Helper\Cart')->getCartUrl();
$url = $this->_redirect->getRedirectUrl($cartUrl);
}
return $this->goBack();
} catch (\Exception $e) {
$this->messageManager->addException($e, __('We can\'t add this item to your shopping cart right now.'));
$this->_objectManager->get('Psr\Log\LoggerInterface')->critical($e);
return $this->goBack();
}
}
/**
* Resolve response
*
* @param string $backUrl
* @param \Magento\Catalog\Model\Product $product
* @return $this|\Magento\Framework\Controller\Result\Redirect
*/
protected function goBack($backUrl = null, $product = null)
{
if (!$this->getRequest()->isAjax()) {
return parent::_goBack($backUrl);
}
$result = [];
if ($backUrl || $backUrl = $this->getBackUrl()) {
$result['backUrl'] = $backUrl;
} else {
if ($product && !$product->getIsSalable()) {
$result['product'] = [
'statusText' => __('Out of stock')
];
}
}
$this->getResponse()->representJson(
$this->_objectManager->get('Magento\Framework\Json\Helper\Data')->jsonEncode($result)
);
}
}
I haven't done any changes here. Instead I've created " **/Observer/CustomPrice.php**" which you see above.