Creacion de Modulo Mageplaza 3

Objetivo crear los modelos para conectar a la BDD

Step 1: Setup Script
Step 2: Create Model
Step 3: Create Resource Model
Step 4: Create Resource Model Collection

code/Mageplaza/HelloWorld/Model/Post.php

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+<?php
+namespace Mageplaza\HelloWorld\Model;
+class Post extends \Magento\Framework\Model\AbstractModel implements \Magento\Framework\DataObject\IdentityInterface
+{
+	const CACHE_TAG = 'mageplaza_helloworld_post';
+
+	protected $_cacheTag = 'mageplaza_helloworld_post';
+
+	protected $_eventPrefix = 'mageplaza_helloworld_post';
+
+	protected function _construct()
+	{
+		$this->_init('Mageplaza\HelloWorld\Model\ResourceModel\Post');
+	}
+
+	public function getIdentities()
+	{
+		return [self::CACHE_TAG . '_' . $this->getId()];
+	}
+
+	public function getDefaultValues()
+	{
+		$values = [];
+
+		return $values;
+	}
+}

code/Mageplaza/HelloWorld/Model/ResourceModel/Post.php

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+<?php
+namespace Mageplaza\HelloWorld\Model\ResourceModel;
+
+
+class Post extends \Magento\Framework\Model\ResourceModel\Db\AbstractDb
+{
+
+	public function __construct(
+		\Magento\Framework\Model\ResourceModel\Db\Context $context
+	)
+	{
+		parent::__construct($context);
+	}
+
+	protected function _construct()
+	{
+		$this->_init('mageplaza_helloworld_post', 'post_id');
+	}
+
+}

code/Mageplaza/HelloWorld/Model/ResourceModel/Post/Collection.php

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+<?php
+namespace Mageplaza\HelloWorld\Model\ResourceModel\Post;
+
+class Collection extends \Magento\Framework\Model\ResourceModel\Db\Collection\AbstractCollection
+{
+	protected $_idFieldName = 'post_id';
+	protected $_eventPrefix = 'mageplaza_helloworld_post_collection';
+	protected $_eventObject = 'post_collection';
+
+	/**
+	 * Define resource model
+	 *
+	 * @return void
+	 */
+	protected function _construct()
+	{
+		$this->_init('Mageplaza\HelloWorld\Model\Post', 'Mageplaza\HelloWorld\Model\ResourceModel\Post');
+	}
+
+}