How can cart table associate with another table? - shopware

Question

I have table table_name(id, cart_token, data , created_at, updated_at ) that wants to associate with shopware cart table using token column (table_name.cart_token = cart.token).
How can we do this association using DAL as long as cart table doesn't have a CartEntity and CartDefinition.
For example: Select * from table_name leftjoin cart on table_name.cart_token=cart.token where cart.token=null.

Answer 1

Without a definition and accompanying entity class you simply won't be able to retrieve the cart as a mapped object using the DAL. You could add your own definition and entity for the cart table but I wouldn't recommend it, as this would just cause problems if multiple extensions got the same idea. I would recommend injecting Doctrine\DBAL\Connection in a service of your plugin and just fetching the cart using raw SQL.
class CartFetcherService
{
private Connection $connection;
public function __construct(Connection $connection)
{
$this->connection = $connection;
}
public function fetchCart(YourCustomEntity $entity): ?array
{
$cart = $this->connection->fetchAssociative(
'SELECT * FROM `cart` WHERE `token` = :token',
[
'token' => $entity->getToken(),
]
);
return $cart ?: null;
}
}
If you want to retrieve the Cart object directly, you could also inject the Shopware\Core\Checkout\Cart\CartPersister service to load the cart.
class CartLoaderService
{
private CartPersister $persister;
public function __construct(CartPersister $persister)
{
$this->persister = $persister;
}
public function getCart(YourCustomEntity $entity, SalesChannelContext $context): ?Cart
{
try {
$cart = $this->persister->load($entity->getToken(), $context)
} catch (\Throwable $exception) {
$cart = null;
}
return $cart;
}
}