Working with database models

Storing data in a database table is handled through a Model class; this model holds the data. While saving the data, a ResourceModel is used, and this class is the link between the Model and database table, and all CRUD operations go through the ResourceModel. When loading a set of records, a Collection is used; it is possible to apply filters to this collection.

Getting ready

Using database models requires that the module configuration is done correctly; otherwise, the autoloader won't be able to find the files to load.

How to do it…

The following steps in this recipe will add the database models to your module:

1. Create the Model class:

   Model/Demo.php

   <?php
   namespace Genmato\Sample\Model;
   use Magento\Framework\Model\AbstractModel;
   class Demo extends AbstractModel
   {
     /**
     * Initialize resource model
     * @return void
     */
     protected function _construct()
     {
       $this->_init('Genmato\Sample\Model\ResourceModel\Demo');
     }
   }

2. Create the ResourceModel class:

   Model...