How to override core files into app/code/Magento folder in magento2

Question

How do I override core files in app/code/Magento folder in Magento 2?

I want to change core functionality so I need to override core files in the app/code/Magento folder instead of directly changing that core files.

Core file:

vendor/magento/module-catalog-import-export/Model/Export/Product.php

Overriden at:

app/code/Magento/CatalogImportExport/Model/Export/Product.php

But it is not working. I don't know how to implement this task. Can you please help me?

Answer 1

You can override model using plugin features in Magento2

for that Create a custom module and in di.xml put code like below

<?xml version="1.0"?> 
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="Magento\CatalogImportExport\Model\Export\Product">
        <plugin name="override-module-export-product" type="Nimesh\HelloWorld\Plugin\Export\Product" sortOrder="1" />
    </type>
</config>

You can override model function using before, after & around method. In below example, We can override export function behavior using before and after method

Create class file like this (app/code/Nimesh/HelloWorld/Plugin/Export/Product.php)

namespace Nimesh/HelloWorld/Plugin/Export;

class Product
{   

    public function beforeExport(\Magento\CatalogImportExport\Model\Export\Product $product)
    {
        /******put your logic *******/            
    }


    public function afterExport(\Magento\CatalogImportExport\Model\Export\Product $product)
    { 
        /********put your logic ********/   
    }

}
?>

Answer 2

Create simple module and override model file.

Step 1.

Create a di.xml file in a following directory Company/CatalogImportExport/etc/

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

    <preference for="Magento\CatalogImportExport\Model\Export\Product" type="Company\CatalogImportExport\Model\Magento\CatalogImportExport\Export\Product" />

</config>

Step 2

<?php

namespace Company\CatalogImportExport\Model\Magento\CatalogImportExport\Export;


class Product extends \Magento\CatalogImportExport\Model\Export\Product
{
        public function __construct()
        {
            echo "Model Rewrite Working"; die();
        }
}

Answer 3

it can easy

1. Move/Copy to core module to - app/code/Magento/Wishlist
2. List item edit composer.json and add

"replace": { "magento/module-wishlist": "*" },

more info by link - https://www.integer-net.com/removing-unused-core-modules-from-magento-2-the-right-way/

3. run command SSH - composer update
4. run command SSH - php bin/magento setup:upgrade
5. check and remove module in vendor/magento/module-wishlist

Now, you can edit/remove logic of Magento standard modules

:)

Answer 4

You have to create one new module in that "code" folder and override that Model's Product.php in that module.