Magento 2: Many-to-Many-Relationship - CRUD

# Magento 2: Many-to-Many-Relationship - CRUD.md

Magento 2 - Many-to-Many-Relationship

CRUD

Api\Data\ProductBlogRelationInterface.php

<?php

namespace WalterWoshid\CustomBlog\Api\Data;

use Magento\Framework\Api\ExtensibleDataInterface;

/**
 * Interface ProductBlogRelationInterface
 *
 * @package WalterWoshid\CustomBlog\Api\Data
 * @api
 */
interface ProductBlogRelationInterface extends ExtensibleDataInterface
{
    /**#@+
     * Constants for keys of data array. Identical to the name of the getter in snake case
     */
    const RELATION_ID = 'relation_id';
    const PRODUCT_ID  = 'product_id';
    const BLOG_ID     = 'blog_id';
    /**#@-*/
    
    /**
     * Get relation ID
     *
     * @return mixed
     */
    public function getId();

    /**
     * Set relation ID
     *
     * @param $value
     * @return $this
     */
    public function setId($value): self;

    /**
     * Get product ID
     *
     * @return int
     */
    public function getProductId(): int;

    /**
     * Set product ID
     *
     * @param int $productId
     * @return $this
     */
    public function setProductId(int $productId): self;
    
    /**
     * Get blog ID
     *
     * @return int
     */
    public function getBlogId(): int;

    /**
     * Set blog ID
     *
     * @param int $blogId
     * @return $this
     */
    public function setBlogId(int $blogId): self;
}

etc\di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
        xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">

    ...
        
    <!-- Product - Blog Relation -->
    <preference for="WalterWoshid\CustomBlog\Api\Data\ProductBlogRelationInterface" 
                type="WalterWoshid\CustomBlog\Model\ProductBlogRelation"/>
    
    ...

</config>

Model\ProductBlogRelation.php

<?php

namespace WalterWoshid\CustomBlog\Model;

use Magento\Framework\Model\AbstractModel;
use WalterWoshid\CustomBlog\Api\Data\ProductBlogRelationInterface;
use WalterWoshid\CustomBlog\Model\ResourceModel\ProductBlogRelation as Resource;

/**
 * Class ProductBlogRelation
 *
 * @package WalterWoshid\CustomBlog\Model
 * @api
 */
class ProductBlogRelation extends AbstractModel implements ProductBlogRelationInterface
{
    /**
     * Custom blog product relation cache tag
     */
    const CACHE_TAG = 'custom_blog_prod_blog_rel';
    
    protected $_cacheTag = self::CACHE_TAG;

    protected $_eventPrefix = 'custom_blog_product_blog_relation';
    
    protected function _construct()
    {
        $this->_init(Resource::class);
    }
    
    public function getId()
    {
        return $this->getData(self::RELATION_ID);
    }

    public function setId($value): ProductBlogRelationInterface
    {
        return $this->setData(self::RELATION_ID, $value);
    }

    public function getProductId(): int
    {
        return $this->getData(self::PRODUCT_ID);
    }

    public function setProductId(int $productId): ProductBlogRelationInterface
    {
        return $this->setData(self::PRODUCT_ID, $productId);
    }
    
    public function getBlogId(): int
    {
        return $this->getData(self::BLOG_ID);
    }

    public function setBlogId(int $blogId): ProductBlogRelationInterface
    {
        return $this->setData(self::BLOG_ID, $blogId);
    }
}

Model\ResourceModel\ProductBlogRelation.php

<?php

namespace WalterWoshid\CustomBlog\Model\ResourceModel;

use Magento\Framework\Model\ResourceModel\Db\AbstractDb;
use WalterWoshid\CustomBlog\Api\Data\ProductBlogRelationInterface;

/**
 * Class ProductBlogRelation
 *
 * @package WalterWoshid\CustomBlog\Model\ResourceModel
 * @api
 */
class ProductBlogRelation extends AbstractDb
{
    const TABLE_NAME = 'custom_blog_product_blog_relation';
    
    protected function _construct()
    {
        $this->_init(self::TABLE_NAME, ProductBlogRelationInterface::RELATION_ID);
    }
}

Model\ResourceModel\ProductBlogRelation\Collection.php

<?php

namespace WalterWoshid\CustomBlog\Model\ResourceModel\ProductBlogRelation;

use Magento\Cms\Model\ResourceModel\AbstractCollection;
use WalterWoshid\CustomBlog\Model\ProductBlogRelation as ProductBlogRelationModel;
use WalterWoshid\CustomBlog\Model\ResourceModel\ProductBlogRelation as ProductBlogRelationResource;

/**
 * Class Collection
 *
 * @package WalterWoshid\CustomBlog\Model\ResourceModel\ProductBlogRelation
 * @api
 */
class Collection extends AbstractCollection
{
    public function _construct()
    {
        $this->_init(
            ProductBlogRelationModel::class,
            ProductBlogRelationResource::class
        );
    }
    
    public function addStoreFilter($store, $withAdmin = true): self
    {
        if (!$this->getFlag('store_filter_added')) {
            $this->performAddStoreFilter($store, $withAdmin);
            $this->setFlag('store_filter_added', true);
        }

        return $this;
    }
}