java - Spring Data Cassandra：InvalidQueryException：UUID 应为 16 或 0 字节 (20)

Question

实体

@Builder
@Getter @Setter
@ToString(doNotUseGetters = true)
@EqualsAndHashCode(doNotUseGetters = true)
@Table(value = "entity")
public class Entity implements Serializable {

    @PrimaryKeyColumn(name = "id", ordinal = 0, type = PrimaryKeyType.PARTITIONED)
    @CassandraType(type = DataType.Name.UUID)
    private UUID Id;

    @Column("list_name")
    @CassandraType(type = DataType.Name.TEXT)
    private String name;

    @Column("type")
    @CassandraType(type = DataType.Name.TINYINT)
    private Byte type;

实体回购

@Repository
public interface EntityRepo extends BaseRepo<Entity, UUID> {

    @Query("SELECT * FROM entity WHERE id IN (:id)")
    Collection<ListEntity> findByIds(@Param("id") Collection<UUID> listIds);

    @Query("SELECT * FROM entity WHERE list_id = :id")
    ListEntity findById(@Param("id") UUID id);

}  

询问

listRepo.findByListId(UUIDs.random())
listRepo.findByListIds(Arrays.asList(UUIDs.random())

两者都导致

CassandraInvalidQueryException/InvalidQueryException
org.springframework.data.cassandra.CassandraInvalidQueryException: Query; CQL 
[SELECT * FROM lists WHERE list_id IN (?)]; UUID should be 16 or 0 bytes (20); 
nested exception is com.datastax.driver.core.exceptions.`InvalidQueryException: UUID should be 16 or 0 bytes (20)

这里有什么遗漏吗？有人可以帮忙吗？

标签： javacassandraspring-data-cassandra

Answer 1

这是我的工作。

使用：findAllBy[object-property]In其中 [object-property] 是 MyModel UUID 的属性名称。

@Table("example")
public class MyModel {
    @PrimaryKeyColumn(name = "uuid", type = PrimaryKeyType.PARTITIONED)
    private UUID uuid;

    @Column("...")
    ...
}

public interface MyRepository extends CassandraRepository<MyModel, UUID> {
    List<Restaurant> findAllByUuidIn(Collection<UUID> uuidButIfYouWant);
}

// It is OK
return this.myRepository.findAllByUuidIn(Set.of(
    UUID.randomUUID(),
    UUID.randomUUID()
));

// Throw Error: no viable alternative at input '<EOF>' (SELECT * FROM example WHERE [uuid] IN...)
return this.myRepository.findAllByUuidIn(Set.of());

所以如果不包含 uuid：

Collection<UUID> search = Set.of();

if(search.size() == 0) {
    return List.of();
}

return this.myRepository.findAllByUuidIn(search);