JPA选择日期低于参数的实体

Question

I'm trying to select all entities where the value of the date field is below a given argument. However, my code doesn't seem to work.

SomeEntity.java

@Entity
public class SomeEntity {
  @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
  private Long id;

  private ZonedDateTime date = ZonedDateTime.now(ZoneId.of("UTC"));
}

SomeEntityRepository.java

public interface SomeEntityRepositoryextends CrudRepository<SomeEntity, Long> {
    /**
     * Get all SomeEntity created before :until
     */
    @Query("Select e from SomeEntity e where e.date < :until")
    List<SomeEntity> findAllUntil(@Param("until") ZonedDateTime until);
}

My problem is this:

I will have a SomeEntity object where the date is 2019-08-31T10:00:00.000+02:00 and the value of until is 2019-08-24T10:00:00.000+02:00 (seven days earlier)

However, the object is still returned from the query.

I am using PostgreSQL 9.6

Answer 1

Not every JDBC driver supports it. You can use one of following solutions:

1. Use TimeStamp instead of ZonedDateTime.

2. Use proper driver and follow its configuration requirements. For instance, for Oracle you may need to specify converter:

    @Convert(converter=OracleZonedDateTimeSeriliazer.class)
    private ZonedDateTime date = ZonedDateTime.now(ZoneId.of("UTC"));

For other databases you may need to implement such a convertor and specify it via @Convert .