How to override Product model in Sylius? - symfony

Question

I am working on Sylius 1.2.8. I have overridden Product model and it is working fine but when I add a new product with attributes:
<?php
...
$em = $this->container->get('sylius.manager.product');
/**
* #var \Sylius\Component\Product\Model\ProductAttributeValueInterface $attribute
* #var \Sylius\Component\Core\Model\ProductInterface $product
*/
$product->addAttribute($attribute);
$em->persist($product);
$em->flush();
It throws this error:
An exception occurred while executing 'INSERT INTO
sylius_product_attribute_value (locale_code, text_value,
boolean_value, integer_value, float_value, datetime_value, date_value,
json_value, product_id, attribute_id) VALUES (?, ?, ?, ?, ?, ?, ?, ?,
?, ?)' with params ["en_US", null, null, null, null, null, null,
"[\"013ea12a-1aff-4050-8107-20b53ada73ce\"]", null, 28]:
SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'product_id' cannot be null
My custom Product Model looks like this:
namespace AppBundle\Entity;
use Doctrine\Common\Collections\ArrayCollection;
use Sylius\Component\Core\Model\Product as BaseProduct;
class Product extends BaseProduct implements ProductInterface
{
public function __construct()
{
parent::__construct();
}
}
And my config file:
sylius_product:
driver: doctrine/orm
resources:
product:
classes:
repository: AppBundle\Doctrine\ORM\ProductRepository
model: AppBundle\Entity\Product
I have found a similar question asked :stackoverflow.com/q/22919004/6248367. But this does not solve my problem neither does it answer why application fails. This answer is also 4 years old. Can someone help me fix this?
Edit: This error is also thrown in admin whenever I create a new product and add attributes to it at the same time. Workaround is to first create product, then add attributes.

Answer 1

I have figured out the problem. As #czende mentioned properly check the configuration.
In my case I had set the wrong class in subject while overriding the attribute:
sylius_product:
driver: doctrine/orm
resources:
product:
classes:
repository: AppBundle\Doctrine\ORM\ProductRepository
model: AppBundle\Entity\Product
sylius_attribute:
driver: doctrine/orm
resources:
product:
# Make sure to provide the correct Product class in the subject.
subject: AppBundle\Entity\Product
attribute:
classes:
model: AppBundle\Entity\ProductAttribute
repository: AppBundle\Doctrine\ORM\ProductAttributeRepository
Also make sure to use mappedSuperclass in the mapping config instead of entity as commented by Michał Marcinkowski in issue #3997
AppBundle\Entity\ProductAttribute:
type: mappedSuperclass
table: sylius_product_attribute
EDIT: To debug what's wrong, start by checking warnings in symfony debug bar. It can narrow down your search area for bug. It can also hint you if something is wrong in your configuration file.