There are following below steps need to follow to add Customer Groups drop down in Magento 2 Custom module Admin Entry Form & Grid Listing by using UI Component.

Here we are considering you have already created custom module by using UI Component.

Step [1] – Create Customergroup.php file inside Admin UI Component Listing Column

File Path as below

app/code/ Mage2db/John/Ui/Component/Listing/Column/Customergroup.php

<?php

namespace Hni\Ebsgroupmapping\Ui\Component\Listing\Column;

use Magento\Framework\View\Element\UiComponent\ContextInterface;
use Magento\Framework\View\Element\UiComponentFactory;
use Magento\Ui\Component\Listing\Columns\Column;
use Magento\Framework\UrlInterface;
use Magento\Cms\Block\Adminhtml\Page\Grid\Renderer\Action\UrlBuilder;
use Magento\Framework\Pricing\PriceCurrencyInterface;
use Magento\Store\Model\StoreManagerInterface;
/**
 * Class ProductActions
 */
class Customergroup extends Column
{

    /**
     * @var UrlInterface
     */
    protected $urlBuilder;
    /**
     * @var PriceCurrencyInterface
     */
    protected $priceFormatter;
    /**
     * @var actionUrlBuilder
     */
    protected $actionUrlBuilder;
    /**
     * @var $_storeManager
     */
    protected $_storeManager;


    /**
     * @param ContextInterface $context
     * @param UiComponentFactory $uiComponentFactory
     * @param UrlInterface $urlBuilder
     * @param array $components
     * @param array $data
     */
    public function __construct(
        ContextInterface $context,
        UiComponentFactory $uiComponentFactory,
        UrlInterface $urlBuilder,
        UrlBuilder $actionUrlBuilder,
        PriceCurrencyInterface $priceFormatter,
        StoreManagerInterface $storeManager,
		\Magento\Customer\Ui\Component\Listing\Column\Group\Options $groups,
        array $components = [],
        array $data = []
    ) {
        $this->urlBuilder = $urlBuilder;
        $this->actionUrlBuilder = $actionUrlBuilder;
        $this->priceFormatter = $priceFormatter;
        $this->_storeManager = $storeManager;
		$this->groups = $groups;
        parent::__construct($context, $uiComponentFactory, $components, $data);
    }
	
	

    /**
     * Prepare Data Source
     *
     * @param array $dataSource
     * @return array
     */
    public function prepareDataSource(array $dataSource)
    {
        if (isset($dataSource['data']['items'])) {
			
            foreach ($dataSource['data']['items'] as & $item) {
	
   	            $customergroups = $this->groups->toOptionArray();
			    $p=0;
				  foreach ($customergroups as $group) {
					  
				  if($customergroups[$p]['value']==$item['customer_groupid']){
							$groupname = $customergroups[$p]['label'];
						}
				  $p++;		
				  }

                $item[$this->getData('name')] = $groupname;
				
            }
        }
        return $dataSource;
    }
}

Step [2] – Add below code in Admin UI Component Grid Listing.

File Path as below [Instead of UIGridListing.xml use your UI Admin Grid Listing file name]

app/code/ Mage2db/John/view/adminhtml/ui_component/UIGridListing.xml

<column name="customer_groupid" class="Hni\Ebsgroupmapping\Ui\Component\Listing\Column\Customergroup">
<argument name="data" xsi:type="array">
<item name="config" xsi:type="array">
<item name="component" xsi:type="string">Hni_Ebsgroupmapping/js/ui/grid/columns/html</item>
<item name="align" xsi:type="string">left</item>
<item name="sortable" xsi:type="boolean">false</item>
<item name="label" xsi:type="string" translate="true">Customer Group</item>
<item name="sortOrder" xsi:type="number">60</item>
</item>
</argument>
</column>

Step [3] – Add below code in Admin UI Component Grid Entry Form

File Path as below [Instead UIGridEntryForm .xml use your UI Admin UI Form file name]

app/code/ Mage2db/John/view/adminhtml/ui_component/UIGridEntryForm.xml

<field name="customer_groupid" sortOrder="40" formElement="select">
<settings>
<label translate="true">Customer Group</label>
</settings>
  <formElements>
   <select>
   <settings>
   <options  class="Magento\Customer\Model\Customer\Source\GroupSourceInterface"/>
   </settings>
   </select>
  </formElements>
</field>		 

Finally Customers drop down has been added in Magento 2 Admin Grid Entry Form as well as It’s corressponding value displaying in Magento 2 Admin Grid Listing by using UI Component.

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CyberSource is a payment gateway. It is used by online payment and fraud management services for medium and large-sized merchants

Cybersource is an E-commerce credit card payment system management company. Customers process online payments, streamline online fraud management, and simplify payment security, It is introduced in Ecommerce market on December, 2016

There are following below steps need to follow to add websites drop down in Magento 2 Custom module Admin Entry Form & Grid Listing by using UI Component.

Here we are considering you have already created custom module by using UI Component.

Step [1] – Create Store.php file inside Admin UI Component Listing Column

<?php
namespace Mage2db\John\Ui\Component\Listing\Column;

use Magento\Framework\View\Element\UiComponent\ContextInterface;
use Magento\Framework\View\Element\UiComponentFactory;
use Magento\Ui\Component\Listing\Columns\Column;
use Magento\Framework\UrlInterface;
use Magento\Cms\Block\Adminhtml\Page\Grid\Renderer\Action\UrlBuilder;
use Magento\Framework\Pricing\PriceCurrencyInterface;
use Magento\Store\Model\StoreManagerInterface;
/**
 * Class ProductActions
 */
class Store extends Column
{

    /**
     * @var UrlInterface
     */
    protected $urlBuilder;
    /**
     * @var PriceCurrencyInterface
     */
    protected $priceFormatter;
    /**
     * @var actionUrlBuilder
     */
    protected $actionUrlBuilder;
    /**
     * @var $_storeManager
     */
    protected $_storeManager;


    /**
     * @param ContextInterface $context
     * @param UiComponentFactory $uiComponentFactory
     * @param UrlInterface $urlBuilder
     * @param array $components
     * @param array $data
     */
    public function __construct(
        ContextInterface $context,
        UiComponentFactory $uiComponentFactory,
        UrlInterface $urlBuilder,
        UrlBuilder $actionUrlBuilder,
        PriceCurrencyInterface $priceFormatter,
        StoreManagerInterface $storeManager,
        array $components = [],
        array $data = []
    ) {
        $this->urlBuilder = $urlBuilder;
        $this->actionUrlBuilder = $actionUrlBuilder;
        $this->priceFormatter = $priceFormatter;
        $this->_storeManager = $storeManager;
        parent::__construct($context, $uiComponentFactory, $components, $data);
    }

    /**
     * Prepare Data Source
     *
     * @param array $dataSource
     * @return array
     */
    public function prepareDataSource(array $dataSource)
    {
        if (isset($dataSource['data']['items'])) {
			
            foreach ($dataSource['data']['items'] as & $item) {
	
 	            $Websites = $this->_storeManager->getWebsites();
				
                $WebsiteName="-";
			
                foreach ($Websites as $website) {
                    if($website->getId()==$item['website_id']){
                      /*put your custom column name instead of website_id */
                        $WebsiteName = $website->getName();
                    }
                }
                $item[$this->getData('name')] = $WebsiteName;
            }
        }
        return $dataSource;
    }
}

<column name="website_id" class="Mage2db\John\Ui\Component\Listing\Column\Store">
 <argument name="data" xsi:type="array">
 <item name="config" xsi:type="array">
 <item name="component" xsi:type="string">Mage2db_John/js/ui/grid/columns/html</item>
<item name="align" xsi:type="string">left</item>
 <item name="sortable" xsi:type="boolean">false</item>
<item name="label" xsi:type="string" translate="true">Store View</item>
<item name="sortOrder" xsi:type="number">60</item>
 </item>
 </argument>
</column>

<field name="website_id" formElement="select">
   <settings>
   <dataType>text</dataType>
    <label translate="true">Website</label>
    <dataScope>data_title</dataScope>
   </settings>
 <formElements>
  <select>
  <settings>
 <options>
 <option name="1" xsi:type="array">
    <item name="value" xsi:type="string">1</item>
    <item name="label" xsi:type="string">Main Website</item>
 </option>
 <option name="2" xsi:type="array">
 <item name="value" xsi:type="string">2</item>
 item name="label" xsi:type="string">Firstwebsite</item>
 </option>
 <option name="3" xsi:type="array">
 <item name="value" xsi:type="string">3</item>
 <item name="label" xsi:type="string">secondsite</item>
 </option>
 </options>
 <caption translate="true">-- Select Website --</caption>
 </settings>
 </select>
 </formElements>
 </field> 

There are following below code , to call Store ID in Magento 2 by using Depdependency Injection.

<?php
namespace Mage2db\John\Block;
class Index extends \Magento\Framework\View\Element\Template
{
    protected $_storeManager;    
    
    public function __construct(
        \Magento\Backend\Block\Template\Context $context,        
        \Magento\Store\Model\StoreManagerInterface $storeManager,        
        array $data = []
    )
    {        
        $this->_storeManager = $storeManager;        
        parent::__construct($context, $data);
    }
    
    /**
     * Get store identifier
     *
     * @return  int
     */
    public function getStoreId()
    {
        return $this->_storeManager->getStore()->getId();
    }
    
    /**
     * Get website identifier
     *
     * @return string|int|null
     */
    public function getWebsiteId()
    {
        return $this->_storeManager->getStore()->getWebsiteId();
    }
    
    /**
     * Get Store code
     *
     * @return string
     */
    public function getStoreCode()
    {
        return $this->_storeManager->getStore()->getCode();
    }
    
    /**
     * Get Store name
     *
     * @return string
     */
    public function getStoreName()
    {
        return $this->_storeManager->getStore()->getName();
    }
    
    /**
     * Get current url for store
     *
     * @param bool|string $fromStore Include/Exclude from_store parameter from URL
     * @return string     
     */
    public function getStoreUrl($fromStore = true)
    {
        return $this->_storeManager->getStore()->getCurrentUrl($fromStore);
    }
    
    /**
     * Check if store is active
     *
     * @return boolean
     */
    public function isStoreActive()
    {
        return $this->_storeManager->getStore()->isActive();
    }
}
?>

echo"<BR> Store ID=".$block->getStoreId();
echo"<BR> Store Code=".$block->getStoreCode();
echo"<BR> Store Website ID=".$block->getWebsiteId();
echo"<BR> Store Name=".$block->getStoreName();
echo"<BR> Store URL=".$block->getStoreUrl();
echo"<BR> Store Active Yes / No=". $block->isStoreActive();

REST API (also known as RESTful API) is an application programming interface (API or web API) that conforms to the constraints of REST architectural style and allows for interaction with RESTful web services.

A Web API (or Web Service) conforming to the REST architectural style is a REST API

Magento 2 REST API identifies multiple functions which can be used to perform requests and receive responses

db_schema_whitelist.json file having history of all tables, columns, primary keys, foreign key, constraint keys combination etc, those are created by using the declarative schema.

There are two ways to generate db_schema_whitelist.json by following below methods

Step [1] – Manually To Create db_schema_whitelist.json

Need to create file below path

app/code/VendorName/ModuleName/etc/db_schema_whitelist.json

Step [2] – CLI Command To Create db_schema_whitelist.json

php bin/magento setup:db-declaration:generate-whitelist --module-name=VendorName_ModuleName

It will auto create db_schema_whitelist.json below path

   app/code/VendorName/ModuleName/etc/db_schema_whitelist.json 

This error occurs because any third-party extension’s table’s column data type as tinytext.

This error occurs if any Third Party Extension’s table’s column data type as tinytext

Solution:: There are following below steps need to follow

Step [1] – Open below path file

/vendor/magento/framework/Setup/Declaration/Schema/Db/DefinitionAggregator.php

To find column name

public function fromDefinition(array $data)
    {
        $type = $data['type'];
        if (!isset($this->definitionProcessors[$type])) {

            /* Starts Add Code for Debug */

            echo "<pre>";
            print_r($data); exit();

            /* Code End for Debug  */

            throw new \InvalidArgumentException(
                sprintf("Cannot process definition to array for type %s", $type)
            );
        }

        $definitionProcessor = $this->definitionProcessors[$type];
        return $definitionProcessor->fromDefinition($data);
    }

Step [2] – Run setup:upgrade command and you will get an array of column data in the console. so from this array, you will get the name of the column from your third party extension table.

Now from that table please change column’s data type “tinytext” to “text” 

Step [3] – Finally issue has been resolved.

Module is backbone of Magento 2, Module having collection of Controllers, Models, Blocks, Helpers, Layouts, Templates, Plugins, Observer etc. These ineract with each other as well as ineract with
Magento 2 exisiting functionalities in order to add a specific feature to a Magento 2 application.

There are following below steps need to follow to create Magento 2 custom module.

Step [1] – Nominate Module Name :: Syntax as below

Namespace_Modulename or Vendorname_Modulename

Namespace(Vendorname) always must be unique.

Step [2] – Create a new directory for the custom module

Syntax as below

Namespace / ModuleName or Vendorname / ModuleName

Step [3] – Create a module’s registration file :: This file name is registration.php & used to registered module.

Syntax as below

<?php

\Magento\Framework\Component\ComponentRegistrar::register(
    \Magento\Framework\Component\ComponentRegistrar::MODULE,
    'Namespace_Modulename',
    __DIR__
);

_{Namespace = Mage2db}

_{Modulename = John}

<?php
\Magento\Framework\Component\ComponentRegistrar::register(
    \Magento\Framework\Component\ComponentRegistrar::MODULE,
    'Mage2db_John',
    __DIR__
);

Briefly Explain registration.php

Step [4] – Create a module’s naming configuration file :: This file name is module.xml & used to define module name ( Namespace_Modulename ) as well as store module into database table setup_module

Syntax as below

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
<module name="Namespace_Modulename" setup_version="3.0.1"/> 
</config>

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
<module name="Mage2db_John" setup_version="3.0.1"/> 
</config>

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There are following below need to click, where each steps has been defined by using Dependency Injection to get all Customers Data.

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How To Get all Customers Data in Magento 2.x / Adobe Commerce 2.x

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How To Add Tier Price Programmatically in Magento 2.x / Adobe Commerce 2.x

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How To Apply Customer Group Price of Products in Magento 2

How To Add Customer Groups Dropdown in Magento 2 Admin Form and Grid By UI Component

How To Get all Customers Data in Magento 2

How To Create Customer Order in Magento 2 Admin Panel

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How To Configure Customer Account Sharing Options in Magento 2

Magento 2 Redirect To Customer Dashboard After Login

Which Magento 2 database table store customer shipping and billing address

How To Remove Sales Order Data & Customer Data in Magento 2

Which Magento 2 database table store customer’s Email Data

Which Magento 2 Database Table Store Customer Newsletter Data

Which Magento 2 database table store customer’s shipping and billing address

How To Remove Sales Order Data & Customer Data in Magento 2

Which Magento 2 Database Tables Store Customer Rating

Which Magento 2 Database Tables Store Customer Wishlist Products

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Which Magento 2 Database Table Store Patches

There are following below steps need to follow, to get all customers in Magento 2

Here, we consider Custom Module with Mage2db_AllCustomers has been already created, we are creating module & calling inside template.

Step [1] – Create below code in block file path Mage2db/AllCustomers/Block/AllCustomers.php

namespace Mage2db/AllCustomers/Block;

use Magento\Backend\App\Action;


class AllCustomers extends Action
{

    protected $customerCollection;

    public function __construct(
        \Magento\Customer\Model\ResourceModel\Customer\CollectionFactory $customerCollection
    )
    {
        $this->customerCollection = $customerCollection;
    }

    public function getAllCustomers()
    {
            return $this->customerCollection->create();


    }
}

Step [2] – Now call function getAllCustomers() inside template & get data.

$allCustomersdata = $this->getAllCustomers();
foreach ($allCustomersdata as $customer) {
    echo $customer->getEmail();
    echo $customer->getFirstname();
    echo $customer->getLastname();
}

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How To Add Customer Groups Dropdown in Magento 2 Admin Form and Grid By UI Component

How To Get all Customers Data in Magento 2

How To Create Customer Order in Magento 2 Admin Panel

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How To Configure Customer Account Sharing Options in Magento 2

Magento 2 Redirect To Customer Dashboard After Login

Which Magento 2 database table store customer shipping and billing address

How To Remove Sales Order Data & Customer Data in Magento 2

Which Magento 2 database table store customer’s Email Data

Which Magento 2 Database Table Store Customer Newsletter Data

Which Magento 2 database table store customer’s shipping and billing address

How To Remove Sales Order Data & Customer Data in Magento 2

Which Magento 2 Database Tables Store Customer Rating

Which Magento 2 Database Tables Store Customer Wishlist Products

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Which Magento 2 Database Table Store Patches