Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 764
  • Last Modified:

Magento 2 Apply discount from checkout second page

I am using Magento 2 enterprise edition (2.0.6)

I want to apply discount on sub total, Discount is applied from cart page (added a button on cart which applies the discount) and then if I go to checkout discount is visible there.

Now I am trying to add button on checkout second page to apply discount. The discount is applied but the order summary is not updated. If I click on button (checkout page) and go to payment express, it shows the discounted amount.

even if i go to cart page after applying discount on checkout it is visible on cart and then visible on checkout also.

I took reference from to apply discount

From what I can see the value is updated in the modal just not on the view on the site bar, a point in the right direction would be great.

Below is my code

[Namespace]/[ModuleName]/etc/sales.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Sales:etc/sales.xsd">
  <section name="quote">
    <group name="totals">
      <item name="custom" instance="[Namespace]\[ModuleName]\Model\Total\Quote\Custom" sort_order="420">
      </item>
    </group>
  </section>
</config>

Open in new window


I created Model under [Namespace]/[ModuleName]/Model/Total/Quote/Custom.php

namespace [Namespace]\[ModuleName]\Model\Total\Quote; 
class Custom extends \Magento\Quote\Model\Quote\Address\Total\AbstractTotal
{
   
   protected $_priceCurrency;
   
   public function __construct(
       \Magento\Framework\Pricing\PriceCurrencyInterface $priceCurrency,
       \Magento\Checkout\Model\Session                     $checkoutSession,
       \[Namespace]/[ModuleName]\Helper\Data $helper
   ){
       $this->_priceCurrency = $priceCurrency;
       $this->checkoutSession             = $checkoutSession;
       $this->helper = $helper;
   }
   public function getDiscountAmount()
    {
        return $this->helper->getDiscountAmount();
    }
   /**
    * @param \Magento\Quote\Model\Quote $quote
    * @param \Magento\Quote\Api\Data\ShippingAssignmentInterface $shippingAssignment
    * @param \Magento\Quote\Model\Quote\Address\Total $total
    * @return $this|bool
    */
   public function collect(
       \Magento\Quote\Model\Quote $quote,
       \Magento\Quote\Api\Data\ShippingAssignmentInterface $shippingAssignment,
       \Magento\Quote\Model\Quote\Address\Total $total
   )
   {
      parent::collect($quote, $shippingAssignment, $total);
      $address             = $shippingAssignment->getShipping()->getAddress();
      $label               = 'My Custom Discount';
      $discountAmount      = -self::getDiscountAmount();   
      $appliedCartDiscount = 0;
      if ($address->getAddressType() == 'shipping') 
      { 
          if($total->getDiscountDescription()) 
          {
            // If a discount exists in cart and another discount is applied, the add both discounts.
            $appliedCartDiscount = $total->getDiscountAmount();
            $discountAmount      = $total->getDiscountAmount()+$discountAmount;
            $label               = $total->getDiscountDescription().', '.$label;
          }    

          $total->setDiscountDescription($label);
          $total->setDiscountAmount($discountAmount);
          $total->setBaseDiscountAmount($discountAmount);
          $total->setSubtotalWithDiscount($total->getSubtotal() + $discountAmount);
          $total->setBaseSubtotalWithDiscount($total->getBaseSubtotal() + $discountAmount);

          if(isset($appliedCartDiscount)) 
          {
            $total->addTotalAmount($this->getCode(), $discountAmount - $appliedCartDiscount);
            $total->addBaseTotalAmount($this->getCode(), $discountAmount - $appliedCartDiscount);
          } 
          else 
          {
            $total->addTotalAmount($this->getCode(), $discountAmount);
            $total->addBaseTotalAmount($this->getCode(), $discountAmount);
          }
      }
      return $this;
   }
}

Open in new window

0
Jeremy Leys
Asked:
Jeremy Leys
  • 4
1 Solution
 
Jeremy LeysTechnical LeadAuthor Commented:
0
 
Jeremy LeysTechnical LeadAuthor Commented:
Ignore the link above it is for M1 and isn't useful in this scenario
0
 
Jeremy LeysTechnical LeadAuthor Commented:
I got the solution,

Actually the methodology that i followed works perfect for cart page Model file
[Namespace]/[ModuleName]/Model/Total/Quote/Custom.php

Open in new window

is not called on checkout process, On checkout need to follow the default magento mechnaism using webapi.xml

I followed the process of reward module in enterprise edition

[Namespace]/[ModuleName]/etc/webapi.xml

<?xml version="1.0"?>
<routes xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Webapi:etc/webapi.xsd">
    <route url="/V1/rewardpoints/mine/use-reward" method="POST">
        <service class="[Namespace]\[ModuleName]\Api\RewardManagementInterface" method="set"/>
        <resources>
            <resource ref="self" />
        </resources>
        <data>
            <parameter name="cartId" force="true">%cart_id%</parameter>
        </data>
    </route>
</routes>

Open in new window


[Namespace]/[ModuleName]/Api/RewardManagementInterface.php


<?php

namespace Namespace]\[ModuleName]\Api;

interface RewardManagementInterface
{
    public function set($cartId);
}

Open in new window


create model to extend this interface and have the functionality in the function set($cartId)

as below

public function __construct(
        \Magento\Quote\Api\CartRepositoryInterface $quoteRepository,
        \[Namespace]\[ModuleName]\Helper\Data $helper,
        \[Namespace]\[ModuleName]\Model\PaymentDataImporter $importer
    ) {
        $this->quoteRepository = $quoteRepository;
        $this->helper = $helper;
        $this->importer = $importer;
    }

    /**
     * {@inheritdoc}
     */
    public function set($cartId)
    {
        if ($this->helper->getEnabled()) 
        {
            /* @var $quote \Magento\Quote\Model\Quote */
            $quote = $this->quoteRepository->getActive($cartId);
            $this->importer->import($quote, $quote->getPayment(), true);
            $quote->collectTotals();
            $this->quoteRepository->save($quote);
            return true;
        }
        return false;
    }

Open in new window


   create another model PaymentDataImporter which will actually apply discount on checkout process

   public function __construct(
        \[Namespace]\[ModuleName]\Helper\Data $helper,
        \Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig
    ) {
        $this->_scopeConfig = $scopeConfig;
        $this->helper = $helper;
    }

    public function import($quote, $payment, $useRewardPoints)
    {
        $discount = $this->helper->getDiscountAmount();
        $quote->getBaseGrandTotal()-$discount;
        return $this;
    }

Open in new window


  most important your js action should give call to this webapi stuff

  storage.post(
        urlBuilder.createUrl('/modulename/mine/use-reward', {}), {}
    )

Open in new window

0
 
Jeremy LeysTechnical LeadAuthor Commented:
Resolved by question writer
0

Featured Post

Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

  • 4
Tackle projects and never again get stuck behind a technical roadblock.
Join Now