{"id":55223,"date":"2021-12-20T05:59:34","date_gmt":"2021-12-20T05:59:34","guid":{"rendered":"https:\/\/www.icreativetechnologies.com\/?p=5433"},"modified":"2021-12-20T05:59:34","modified_gmt":"2021-12-20T05:59:34","slug":"change-the-price-of-items-in-cart","status":"publish","type":"post","link":"https:\/\/www.icreativetechnologies.com\/de\/change-the-price-of-items-in-cart\/","title":{"rendered":"How To Change Price Of Items In Cart – Shopware 6 Development"},"content":{"rendered":"

If you want to change price of Items in cart then you can use a cart collector and a cart processor.\u00a0<\/span><\/p>\n

The collector<\/h2>\n

The Collector collects all the necessary data for line items. It will also take care of reducing duplicated requests, but we’ll get into that later.<\/span><\/p>\n

This guide will not cover where to actually fetch the new prices from, that’s up to you. This could e.g. be an <\/span>extension of the product entity<\/span><\/a>, which contains the new price, or an API call from somewhere else, which will return the new price.<\/span><\/p>\n

Your collector class has to implement the interface Shopware\\Core\\Checkout\\Cart\\CartDataCollectorInterface and therefore the method collect.<\/span><\/p>\n

\n\n\n\n
<?php declare(strict_types=1);<\/span><\/p>\n

namespace ICT\\BasicExample\\Core\\Checkout\\Cart;<\/span><\/p>\n

use Shopware\\Core\\Checkout\\Cart\\Cart;<\/span><\/p>\n

use Shopware\\Core\\Checkout\\Cart\\CartBehavior;<\/span><\/p>\n

use Shopware\\Core\\Checkout\\Cart\\CartDataCollectorInterface;<\/span><\/p>\n

use Shopware\\Core\\Checkout\\Cart\\LineItem\\CartDataCollection;<\/span><\/p>\n

use Shopware\\Core\\Checkout\\Cart\\LineItem\\LineItem;<\/span><\/p>\n

use Shopware\\Core\\System\\SalesChannel\\SalesChannelContext;<\/span><\/p>\n

class OverwritePriceCollector implements CartDataCollectorInterface<\/span><\/p>\n

{<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0public function collect(CartDataCollection $data, Cart $original, SalesChannelContext $context, CartBehavior $behavior): void<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0{<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ get all product ids of current cart<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0$productIds = $original->getLineItems()->filterType(LineItem::PRODUCT_LINE_ITEM_TYPE)->getReferenceIds();<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ remove all product ids which are already fetched from the database<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0$filtered = $this->filterAlreadyFetchedPrices($productIds, $data);<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ Skip execution if there are no prices to be requested & saved<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if (empty($filtered)) {<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return;<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0foreach ($filtered as $id) {<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0$key = $this->buildKey($id);<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ Needs implementation, just an example<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0$newPrice = $this->doSomethingToGetNewPrice();<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ we have to set a value for each product id to prevent duplicate queries in next calculation<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0$data->set($key, $newPrice);<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0}<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0private function filterAlreadyFetchedPrices(array $productIds, CartDataCollection $data): array<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0{<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0$filtered = [];<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0foreach ($productIds as $id) {<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0$key = $this->buildKey($id);<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ already fetched from database?<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if ($data->has($key)) {<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0continue;<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0$filtered[] = $id;<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return $filtered;<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0}<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0private function buildKey(string $id): string<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0{<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return ‘price-overwrite-‘.$id;<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0}<\/span><\/p>\n

}<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Weiterlesen<\/strong>: Shopware 6 Plugin: Cross-Selling and Up-Selling in the Cart<\/a><\/span><\/p>\n


\n<\/span>So the example class is called <\/span>OverwritePriceCollector<\/span> here and it implements the method collect. This method’s parameters are the following:<\/span><\/p>\n