Author: m@g3m@nk3y$

If you need to change default container max-width globally, just need to change like below:

Add _variables.less file in your theme web/css/source folder and add below variable

@layout__max-width: 1360px;

If you want all products to have Use Default Value as CHECKED, then run below SQL in the database:

DELETE FROM `catalog_product_entity_text` where store_id = 1;
DELETE FROM `catalog_product_entity_datetime` where store_id = 1;
DELETE FROM `catalog_product_entity_decimal` where store_id = 1;
DELETE FROM `catalog_product_entity_int` where store_id = 1;
DELETE FROM `catalog_product_entity_varchar` where store_id = 1;

If you want all categories to have Use Default Value as CHECKED, then run below SQL in the database:

DELETE FROM `catalog_category_entity_text` where store_id = 1;
DELETE FROM `catalog_category_entity_datetime` where store_id = 1;
DELETE FROM `catalog_category_entity_decimal` where store_id = 1;
DELETE FROM `catalog_category_entity_int` where store_id = 1;
DELETE FROM `catalog_category_entity_varchar` where store_id = 1;

Follow below steps to install Using composer : 

- composer require --dev magento/magento-coding-standard
- php bin magento setup:upgrade
- php bin/magento cache:flush

You are done with installations.

Now, You can check Magento coding standard errors using the below command for Custom module :

vendor/bin/phpcs --standard=Magento2 app/code/Vendor/Module

After running the above command, you can see coding errors and warnings. You need to resolve those errors & warnings by adopting Magento coding standards.

That’s It.

In one of the Magento 2 project, we have added a load more button on the listing page.

So whenever the user clicks on the load more button, the next page of products will be shown.

You can use below on the custom listing page.

<script src ="https://infiniteajaxscroll.com/vendor/jquery-ias/dist/jquery-ias.min.js"></script>
<link src = "https://raw.githubusercontent.com/ravbetsky/infinite-ajax-scroll/master/dist/css/jquery.ias.css"/>
<script type="text/javascript">
var ias = jQuery.ias({
container: ".main",
item: ".products-grid",
pagination: ".toolbar .pages",
next: ".next"
});
ias.extension(new IASSpinnerExtension()); // shows a spinner (a.k.a. loader)
ias.extension(new IASTriggerExtension({offset: 1})); // shows a trigger after page 3
ias.extension(new IASNoneLeftExtension({
text: 'There are no more pages left to load.' // override text when no pages left
}));
</script>

You will also need to change class for this as shown below.

container: ".main",
item: ".products-grid",
pagination: ".toolbar .pages",
next: ".next"

That’s it.

To achieve this, create a basic module and below code in InstallSchema.php file.

Change the vendor namespace and module name as per your requirement.

<?php
namespace MagemonkeysDiscontinueSetup;

use MagentoEavSetupEavSetup;
use MagentoEavSetupEavSetupFactory;
use MagentoFrameworkSetupInstallDataInterface;
use MagentoFrameworkSetupModuleContextInterface;
use MagentoFrameworkSetupModuleDataSetupInterface;

class InstallData implements InstallDataInterface
{
    private $eavSetupFactory;

    public function __construct(EavSetupFactory $eavSetupFactory)
    {
        $this->eavSetupFactory = $eavSetupFactory;
    }

    public function install(
        ModuleDataSetupInterface $setup,
        ModuleContextInterface $context
    )
    {
        /** @var EavSetup $eavSetup */
        $eavSetup = $this->eavSetupFactory->create(['setup' => $setup]);

        /**
         * Add attributes to the eav/attribute
         */
           $eavSetup->addAttribute(
            MagentoCatalogModelProduct::ENTITY,
            'discontinue',
            [
                'group' => 'Discontinue Product Information',
                'type' => 'int',
                'backend' => '',
                'frontend' => '',
                'label' => 'Discontinue',
                'input' => 'boolean',
                'class' => '',
                'source' => 'MagentoEavModelEntityAttributeSourceBoolean',
                'global' => MagentoCatalogModelResourceModelEavAttribute::SCOPE_GLOBAL,
                'visible' => true,
                'required' => false,
                'user_defined' => false,
                'default' => false,
                'searchable' => false,
                'filterable' => false,
                'comparable' => false,
                'visible_on_front' => false,
                'used_in_product_listing' => true,
                'unique' => false
            ]
        );

           /**
         * Add attributes to the eav/attribute
         */
           $eavSetup->addAttribute(
            MagentoCatalogModelProduct::ENTITY,
            'alternate_product_url',
            [
                 'group' => 'Discontinue Product Information',
                 'type' => 'text',
                 'backend' => '',
                 'frontend' => '',
                 'label' => 'Alternate Product URL',
                 'input' => 'text',
                 'class' => '',
                 'source' => '',
                 'global' => MagentoEavModelEntityAttributeScopedAttributeInterface::SCOPE_GLOBAL,
                 'visible' => false,
                 'required' => false,
                 'user_defined' => false,
                 'default' => '',
                 'searchable' => false,
                 'filterable' => false,
                 'comparable' => false,
                 'visible_on_front' => true,
                 'used_in_product_listing' => true,
                 'unique' => false,
                 'apply_to' => ''
            ]
        );
           $eavSetup->addAttribute(
            MagentoCatalogModelProduct::ENTITY,
            'alternate_product_sku',
            [
                 'group' => 'Discontinue Product Information',
                 'type' => 'text',
                 'backend' => '',
                 'frontend' => '',
                 'label' => 'Alternate Product SKU',
                 'input' => 'text',
                 'class' => '',
                 'source' => '',
                 'global' => MagentoEavModelEntityAttributeScopedAttributeInterface::SCOPE_GLOBAL,
                 'visible' => true,
                 'required' => false,
                 'user_defined' => false,
                 'default' => '',
                 'searchable' => false,
                 'filterable' => false,
                 'comparable' => false,
                 'visible_on_front' => true,
                 'used_in_product_listing' => true,
                 'unique' => false,
                 'apply_to' => ''
            ]
        );
    }
}

Create a Observer with catalog_product_save _before in adminhtml/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="catalog_product_save_before">
        <observer name="discontinue_product_save_after" instance="MagemonkeysDiscontinueObserverProductsavebefore" />
    </event>
</config>

Add Observer file and place the below code in it.

<?php

namespace MagemonkeysDiscontinueObserver;

use MagentoFrameworkEventObserverInterface;
use MagentoCatalogApiProductRepositoryInterface;
use MagentoFrameworkUrl;
use MagentoFrameworkExceptionNoSuchEntityException;

class Productsavebefore implements ObserverInterface
{    

    /**
     * @var ProductRepositoryInterface
     */
    protected $productRepository;

    protected $_url;
 
    /**
     * @param ProductRepositoryInterface $productRepository
     */
    public function __construct(
        ProductRepositoryInterface $productRepository,
        Url $url
    ) {
        $this->productRepository = $productRepository;
        $this->_url = $url;
    }

    public function execute(MagentoFrameworkEventObserver $observer)
    {
        $_product = $observer->getProduct();  // you will get product object

        $sku = $_product->getAlternateProductSku();

        if($sku != '')
        {
            try
            {
                $alternateProduct = $this->productRepository->get($sku);
            }
            catch (NoSuchEntityException $noSuchEntityException) {
                $productUrl = null;
            }

            if($alternateProduct)
            {

                $product = $this->productRepository->getById($alternateProduct->getId(), false);
                //$productUrl = $product->setStoreId(1)->getUrlModel()->getUrlInStore($product, ['_escape' => true]);
                $productUrl = $product->getUrlKey();
                $_product->setData('alternate_product_url', $productUrl);
                
            }
        }
        else
        {
            $productUrl = null;
            $_product->setData('alternate_product_url', $productUrl);
        }

    }   
}

Create a plugin with aroundGetProduyctCollection to remove the discontinue product from whole site. Please add the below code in that plugin.

<?php

namespace MagemonkeysDiscontinuePluginMagentoCatalogModel;

class Layer
{

    public function aroundGetProductCollection(
        MagentoCatalogModelLayer $subject,
        Closure $proceed
    ) {
        $collection = $proceed();
        $collection->addAttributeToSelect('*')->addAttributeToFilter(array(
            array(
                'attribute' => 'discontinue',
                'null' => true),
            array(
                'attribute' => 'discontinue',
                'eq' => '0')
        ));
        return $collection;
    }


}

If you want to change the main price with a custom price attribute. You can use the below method

1. Create file di.xml on app/code/Magemonkeys/CustomPrice/etc/frontend

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="MagentoCatalogModelProduct">
        <plugin name="change_product" type="MagemonkeysCustomPricePluginModelProduct" sortOrder="1" />
    </type>
</config>

2. Create file Product.php on app/code/Magemonkeys/CustomPrice/Plugin/Model

<?php
namespace MagemonkeysCustomPricePluginModel;
 
class Product
{
    public function afterGetPrice(MagentoCatalogModelProduct $subject, $result)
    {        
        $result = $subject->getCustomPrice(); // you can set custom attribute price
        return $result;
    }
}

We can create custom api for GraphQL.

As per the app/code/ standard, our module name is Magemonkeys/Customgraphql

We can create schema.graphqls file in module etc folder.

Below is the code for that file.

type Query
{
    CustomGraphql (
        username: String @doc(description: "Email of the customer")
        password: String @doc(description: "Password")
        fieldtype: String @doc(description: "Field Type")
    ): CustomGraphqlOutput @resolver(class: "Magemonkeys\Customgraphql\Model\Resolver\ResolverGraphql") @doc(description:"Customgraphql Datapassing")
}
type CustomGraphqlOutput
{
    username: String
    password: String
    fieldtype: String
}

After that we need to create Model Resolver file.

Create file ResolverGraphql.php in this location of module
Magemonkeys/Customgraphql/Model/Resolver/

Below is the code for that file.

<?php
namespace MagemonkeysCustomgraphqlModelResolver;

use MagentoFrameworkGraphQlConfigElementField;
use MagentoFrameworkGraphQlExceptionGraphQlInputException;
use MagentoFrameworkGraphQlQueryResolverInterface;
use MagentoFrameworkGraphQlSchemaTypeResolveInfo;
use MagentoFrameworkExceptionNoSuchEntityException;
use MagentoFrameworkGraphQlExceptionGraphQlNoSuchEntityException;

class ResolverGraphql implements ResolverInterface
{
    public function resolve(
        Field $field,
        $context,
        ResolveInfo $info,
        array $value = null,
        array $args = null)
    {
        if (!isset($args['username']) || !isset($args['password']) || !isset($args['fieldtype'])||
            empty($args['username']) || empty($args['password']) || empty($args['fieldtype']))
        {
            throw new GraphQlInputException(__('Invalid arguments list please check.'));
        }
        $output = [];
        $output['username'] = $args['username'];
        $output['password'] = $args['password'];
        $output['fieldtype'] = $args['fieldtype'];
      
        return $output ;
    }
}

After that you can check API in Postman API tool.

That’s it.