Magento 2 Add Custom Discount Separate Row in Summary

1) Create a sales.xml file on app/code/Vendor/module/etc

<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="promodiscount" instance="Vendor\Module\Model\Quote\Discount" sort_order="500"/>
        </group>
    </section>
</config>

</group>

</section>

</config>

2) Create file Discount.php on this path app\code\Vendor\Module\Model\Quote\Discount

namespace Vendor\Module\Model\Quote;

class Discount extends \Magento\Quote\Model\Quote\Address\Total\AbstractTotal
{

    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);

            $customDiscount = -20;

            $total->addTotalAmount('customdiscount', $customDiscount);
            $total->addBaseTotalAmount('customdiscount', $customDiscount);
            $quote->setCustomDiscount($customDiscount);
        }
        return $this;
    }

    /**
     * Assign subtotal amount and label to address object
     *
     * @param \Magento\Quote\Model\Quote $quote
     * @param Address\Total $total
     * @return array
     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
     */
    public function fetch(\Magento\Quote\Model\Quote $quote, \Magento\Quote\Model\Quote\Address\Total $total)
    {	
    	$customDiscount = 20;
        return [
            'code' => 'Custom_Discount',
            'title' => $this->getLabel(),
            'value' => $customDiscount
        ];
    }

    /**
     * get label
     * @return string
     */
    public function getLabel()
    {
        return __('Custom Discount');
    }
}

namespace Vendor\Module\Model\Quote;

class Discount extends \Magento\Quote\Model\Quote\Address\Total\AbstractTotal

{

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);

$customDiscount = -20;

$total->addTotalAmount('customdiscount', $customDiscount);

$total->addBaseTotalAmount('customdiscount', $customDiscount);

$quote->setCustomDiscount($customDiscount);

}

return $this;

}

/**

* Assign subtotal amount and label to address object

* @param \Magento\Quote\Model\Quote $quote

* @param Address\Total $total

* @return array

* @SuppressWarnings(PHPMD.UnusedFormalParameter)

public function fetch(\Magento\Quote\Model\Quote $quote, \Magento\Quote\Model\Quote\Address\Total $total)

{

$customDiscount = 20;

return [

'code' => 'Custom_Discount',

'title' => $this->getLabel(),

'value' => $customDiscount

];

}

/**

* get label

* @return string

public function getLabel()

{

return __('Custom Discount');

}

3) Create file checkout_cart_index.xml on path app\code\Vendor\Module\view\frontend\layout

<?xml version="1.0"?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" layout="1column" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
    <body>
	<referenceBlock name="checkout.cart.totals">
	   <arguments>
	       <argument name="jsLayout" xsi:type="array">
	           <item name="components" xsi:type="array">
	               <item name="block-totals" xsi:type="array">
	                   <item name="children" xsi:type="array">
	                       <item name="customdiscount" xsi:type="array">
	                           <item name="component"  xsi:type="string">Vendor_Module/js/view/checkout/summary/custom-discount</item>
	                           <item name="sortOrder" xsi:type="string">30</item>
	                           <item name="config" xsi:type="array">
	                               <item name="customdiscount" xsi:type="string" translate="true">Custom Discount</item>
	                           </item>
	                       </item>
	                   </item>
	               </item>
	           </item>
	       </argument>
	   </arguments>
	</referenceBlock>
    </body>
</page>

<?xml version="1.0"?>

<body>

<item name="component" xsi:type="string">Vendor_Module/js/view/checkout/summary/custom-discount</item>

<item name="customdiscount" xsi:type="string" translate="true">Custom Discount</item>

</item>

</argument>

</arguments>

</referenceBlock>

</body>

</page>

4) Create file checkout_index_index.xml on path app\code\Vendor\Module\view\frontend\layout

<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" layout="1column" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
    <body>
        <referenceBlock name="checkout.root">
            <arguments>
                <argument name="jsLayout" xsi:type="array">
                    <item name="components" xsi:type="array">
                        <item name="checkout" xsi:type="array">
                            <item name="children" xsi:type="array">
                                <item name="sidebar" xsi:type="array">
                                    <item name="children" xsi:type="array">
                                        <item name="summary" xsi:type="array">
                                            <item name="children" xsi:type="array">
                                                <item name="totals" xsi:type="array">
                                                    <item name="children" xsi:type="array">
                                                       <item name="customdiscount" xsi:type="array">
                                                            <item name="component"  xsi:type="string">Vendor_Module/js/view/checkout/cart/totals/custom-discount</item>
                                                            <item name="sortOrder" xsi:type="string">20</item>
                                                            <item name="config" xsi:type="array">
                                                                 <item name="template" xsi:type="string">Vendor_Module/checkout/cart/totals/custom-discount</item>
                                                                <item name="title" xsi:type="string" translate="true">Custom Discount</item>
                                                            </item>
                                                        </item>
                                                    </item>
                                                </item>
                                                <item name="cart_items" xsi:type="array">
                                                    <item name="children" xsi:type="array">
                                                        <item name="details" xsi:type="array">
                                                            <item name="children" xsi:type="array">
                                                                <item name="subtotal" xsi:type="array">
                                                                    <item name="component" xsi:type="string">Magento_Tax/js/view/checkout/summary/item/details/subtotal</item>
                                                                </item>
                                                            </item>
                                                        </item>
                                                    </item>
                                                </item>
                                            </item>
                                        </item>
                                    </item>
                                </item>
                            </item>
                        </item>
                    </item>
                </argument>
            </arguments>
        </referenceBlock>
    </body>
</page>

<body>

<item name="component" xsi:type="string">Vendor_Module/js/view/checkout/cart/totals/custom-discount</item>

<item name="template" xsi:type="string">Vendor_Module/checkout/cart/totals/custom-discount</item>

<item name="title" xsi:type="string" translate="true">Custom Discount</item>

</item>

<item name="component" xsi:type="string">Magento_Tax/js/view/checkout/summary/item/details/subtotal</item>

</item>

</argument>

</arguments>

</referenceBlock>

</body>

</page>

5) Create file custom-discount.js on path app/code/Vendor/Module/view/frontend/web/js/view/checkout/cart/totals

define(
    [
        'Vendor_Module/js/view/checkout/summary/custom-discount'
    ],
    function (Component) {
        'use strict';

        return Component.extend({

            /**
             * @override
             */
            isDisplayed: function () {
                return true;
            }
        });
    }
);

define(

[

'Vendor_Module/js/view/checkout/summary/custom-discount'

function (Component) {

'use strict';

return Component.extend({

/**

* @override

isDisplayed: function () {

return true;

}

});

}

);

6) Create file custom-discount.html on path app/code/Vendor/Module/view/frontend/web/template/checkout/cart/totals

<!-- ko if: isDisplayedCustomdiscountTotal() -->
<tr class="totals customdiscount excl">
    <th class="mark" colspan="1" scope="row" data-bind="text: title"></th>
    <td class="amount">
        <span class="price" data-bind="text: getCustomdiscountTotal()"></span>
    </td>
</tr>
<!-- /ko -->

</td>

</tr>

7) Create file on this path custom-discount.js app/code/Vendor/Module/view/frontend/web/js/view/checkout/summary

define(
    [
       'jquery',
       'Magento_Checkout/js/view/summary/abstract-total',
       'Magento_Checkout/js/model/quote',
       'Magento_Checkout/js/model/totals',
       'Magento_Catalog/js/price-utils'
    ],
    function ($,Component,quote,totals,priceUtils) {
        "use strict";
        return Component.extend({
            defaults: {
                template: 'Vendor_Module/checkout/summary/custom-discount'
            },
            totals: quote.getTotals(),
            isDisplayedCustomdiscountTotal : function () {
                return true;
            },
            getCustomdiscountTotal : function () {
                var price = totals.getSegment('Custom_Discount').value;
                return this.getFormattedPrice(price);
            }
         });
    }
);

define(

[

'jquery',

'Magento_Checkout/js/view/summary/abstract-total',

'Magento_Checkout/js/model/quote',

'Magento_Checkout/js/model/totals',

'Magento_Catalog/js/price-utils'

function ($,Component,quote,totals,priceUtils) {

"use strict";

return Component.extend({

defaults: {

template: 'Vendor_Module/checkout/summary/custom-discount'

totals: quote.getTotals(),

isDisplayedCustomdiscountTotal : function () {

return true;

getCustomdiscountTotal : function () {

var price = totals.getSegment('Custom_Discount').value;

return this.getFormattedPrice(price);

}

});

}

);

8) Create file custom-discount.html on path app/code/Vendor/Module/view/frontend/web/template/checkout/summary

<!-- ko if: isDisplayedCustomdiscountTotal() -->
<tr class="totals coupon-discount excl">
   <th class="mark" colspan="1" scope="row" data-bind="text: customdiscount"></th>
   <td class="amount">
       <span class="price" data-bind="text: getCustomdiscountTotal(), attr: {'data-th': customdiscount}"></span>
   </td>
</tr>
<!-- /ko -->

</td>

</tr>

Fill the below form if you have any Magento programming need.

Add an image programmatically from any url in Magento 2
[crayon-638cecaf1be8b109298414/] Using above fucntion Images can be imported directly from...
Magento 2 : Override the Category view block file
Override view block using di.xml and add the below code...
How to check list of Layout XML called for a specific page in Magento 2?
You can check a list of called layout XML for...
Magento 2 : Setup PWA from Scratch
Follow the below steps to install and set up PWA...
How to remove leading zero’s from the order, invoice and shipment number in Magento 2?
If you want to remove all leading zero's from order,...

Author Info

Hire s. dutt

Let’s have a call

Fill the form & Get Installation Support