Override Magento 2 Order Invoice PDF

Question

I can not seem to override the Magento Invoice class.

I've created a module, installed it, enabled it. I have the following in my di.xml file

<?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\Sales\Model\Order\Pdf\Invoice" type="Dojo\InvoiceBarcodes\Model\Order\Pdf\Invoice" />
</config>

I've run the following commands:

./bin/magento cache:flush
./bin/magento setup:di:compile

If I run dev:di:info, it shows my class as a preference...

$ ./bin/magento dev:di:info "Magento\Sales\Model\Order\Pdf\Invoice"

DI configuration for the class Magento\Sales\Model\Order\Pdf\Invoice in the GLOBAL area

Preference: Dojo\InvoiceBarcodes\Model\Order\Pdf\Invoice

Constructor Parameters:
+-------------------+-----------------------------------------------------+-----------------------------------------------------------------------+
| Name              | Requested Type                                      | Configured Value                                                      |

I can verify it's not using my class because if I alter the Magento Invoice file, it reflects when I click print invoice.

I've checked all the logs, and there are no errors.

I'm not sure if I'm doing something wrong, if you can't override this class, or need to override in a different way.

Magento version 2.3.2

Any help would be appreciated.

Answer 1

I have create the custom module check this code :-

Mage/Mohit/registration.php

<?php

\Magento\Framework\Component\ComponentRegistrar::register(
    \Magento\Framework\Component\ComponentRegistrar::MODULE,
    'Mage_Mohit',
    __DIR__
);

Mage/Mohit/etc/module.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../../../lib/internal/Magento/Framework/Module/etc/module.xsd">
    <module name="Mage_Mohit" setup_version="1.0.0"/>
</config>

Mage/Mohit/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">
<preference for="Magento\Sales\Model\Order\Pdf\Invoice" type="Mage\Mohit\Model\Order\Pdf\Invoice" />
</config>

Mage/Mohit/Model/Order/Pdf/Invoice.php

<?php


namespace Mage\Mohit\Model\Order\Pdf;
class Invoice extends \Magento\Sales\Model\Order\Pdf\Invoice
{
  // Add your file code 
}

finally run this command :-

rm -rf var/cache/*
rm -rf var/view_preprocessed/*
php bin/magento s:up
php bin/magento setup:di:compile
php bin/magento i:rei
php bin/magento c:c
php bin/magento c:f

Any query let me know ...

Thanks.

Answer 2

Thanks for the help.

In this case, another module was already trying to override the same class. I had to switch my code to override that module's class. Rather than the core magento class.