Magento 2 - Issue on override of Multishipping checkout model

Question

With this question I want to go further and to exactly know if it's possible to override:

vendor/magento/module-multishipping/Model/Checkout/Type/Multishipping.php

so far I've experienced some complications performing this override, I had to override also PlaceOrderDefaulr, PlaceOrderFactory and PlaceOrderInferface

I've added preferences tags in ../etc/di.xml of my module to include above mentioned classes, but now the error prompted is:

Fatal error: Uncaught TypeError: Argument 2 passed to Magento\Multishipping\Model\Checkout\Type\Multishipping\State::__construct() must be an instance of Magento\Multishipping\Model\Checkout\Type\Multishipping, instance of Vendor\MyModule\Model\Checkout\Type\Multishipping given, called in /var/www/html/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php on line 111

I've cleared /generated folder and also /var/cache, view_preprocessed, page_cache, session/

and the error is still the same.. as a second parameter in constructor the follwing is called:

\Magento\Customer\Model\Session

Then used to retrieve logged-in customer information to get addresses, etc.

Any ideas? will be appreciated.

Answer 1

I've managed to solve the issue, simply creating an override for

Magento\Multishipping\Model\Checkout\Type\Multishipping\State

in my module and the consequents necessary overrides that were arise after fix that.. just like that.

I've created

Vendor\MyModule\Model\Checkout\Type\Multishipping\State

And updated namespace and construct to use my module instead the Magento2 one.