I am using Spring boot 3.3.2 and hibernate 6.5.2.Final. And I wanted to pass a Collection of a custom object to a query annotated with @Query inside a repository.

Adding that the Collection is not of the entity.

public class OrderEntity {
  @Id private OrderId orderId;

  private Merchant merchant;

  ...

public interface OrderRepository
    extends Repository<OrderEntity, OrderId> {

  @Query(
      "from OrderEntity oe "
     + " and (: merchantFilter is null or oe.merchantId in : merchantFilter)")
  CompletableFuture<Page<OrderEntity>> findOrders(Collection<Merchant> merchantFilter);

And the Merchant class has a toString to just return the merchantId. My idea is I wanted to know how can I add a converter specific for the named parameters or how to instruct the binder, to use a custom logic for it. Given it tries to bind it to varbinary and thus trying to serialize Merchant, and I do not want so. Appreciate your help