Spring数据包含不适用于整数

Question

I am implementing search method. And i want to searach for integers. So i have this method in repo:

public interface CarRepository extends CrudRepository<Car, Long> {
      List<Car> findByRocznikIsContaining(Integer rocznik);
}

My Entity:

@Entity
    public class Car {

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String model;
private @Lob
String historiaSamochodu;
private Double przebieg;
private Integer rocznik;

But when i pass to my method any integer eg:

findByRocznikIsContaining(5);

It throws an error:

java.lang.IllegalArgumentException: Parameter value [%5%] did not match expected type [java.lang.Integer (n/a)]

Any idea why?

Answer 1

I've checked this link https://docs.spring.io/spring-data/jpa/docs/current/reference/html/#jpa.query-methods.query-creation and for findBy...Containing it shows the following pseudo SQL code … where x.firstname like ?1 (parameter bound wrapped in %) . Which in your case is transformed in where x.roczik like %5% . And basically %5% is a String and cannot be converted to Integer. You could try to go with @Query annotation for that method like this:

@Query("select c from Car c where to_char(c.rocznik) like %?1%")
List<Car> findByRocznikIsContaining(Integer rocznik);