src/main/java/com/eca/catalogue/product/repository/ProductRepository.java
package com.eca.catalogue.product.repository;
import com.eca.catalogue.product.model.Product;
import org.springframework.data.repository.CrudRepository;
import java.util.List;
public interface ProductRepository extends CrudRepository<Product, String> {
List<Product> findByLocationIdOrLocationIdIsNull(String locationId);
}