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constructor with single underscore – Magento

I have below code in model of Magento2 custom module. As I know constructor can be define using __construct() but in below code they used _construct().I want to know the difference between two. Can it be a function ? 

use MagentoFrameworkModelResourceModelDbAbstractDb;

class Post extends AbstractDb
{
    /**
     * Post Abstract Resource Constructor
     * @return void
     */
    protected function _construct()
    {
        $this->_init('myblog', 'post_id');
    }
}
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3

Answers


  1. Chosen as BEST ANSWER
    0

    I got answer and mentioning here if someone have any confusion for the same. In reference to Magento2 , single-underscore construct method is a legacy code from Magento 1 and it is called in real _construct method of MagentoFrameworkModelAbstractModel.


  2. 0

    _construct is not constructor its a method like other methods. Where __construct is the default constructor.

    For details (__construct and _construct)

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  3. 0

    Single underscore construct (_construct) is used to avoid overriding the actual constructor with double underscore (__construct).

    Example: vendor/magento/framework/Model/ResourceModel/AbstractResource.php

        /**
     * Constructor
     */
    public function __construct()
    {
        /**
         * Please override this one instead of overriding real __construct constructor
         */
        $this->_construct();
    }

    /**
     * Resource initialization
     *
     * @return void
     */
    abstract protected function _construct();

    Related question with more answers: Why does Magento have _construct and __construct methods?

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