在使用 postgresql 排除主键后执行 NamedNativeQuery Join 查询时面临错误

Question

我在结果输出中不需要 id（主键），但在查询和结果集中排除 id 后得到 error.org.postgresql.util.PSQLException：在此 ResultSet 中找不到列名 id。 jpa 所以需要帮助格式化这个实体类。

注意：假设应该像下面的方法调用一样进行 entityManager.createNamedQuery("getPublisherInfoList",PublisherInfoResponseEntity.class).getResultList();

@NamedNativeQueries(value = {
@NamedNativeQuery(
name = "getPublisherInfoList",
query = "SELECT publisher.publisher_name,publisher.contact_name,publisher.contact_email,publisher.contact_phone,publisher.managed_services,\n" +
         "annual.customers,annual.employees,annual.revenue,"
     "FROM publisher_portal.publisher_informations publisher JOIN publisher_portal.publisher_annual annual\n" +
"ON publisher.publisher_name=annual.publisher_name",

resultSetMapping = "PublisherInfoResponseMappings"
),

@NamedNativeQuery(
name = "getPublisherByName",
query = "SELECT publisher.publisher_name,publisher.contact_name,publisher.contact_email,publisher.contact_phone,\n" +
"publisher.managed_services,annual.customers,annual.employees,annual.revenue,\n" +
"FROM publisher_portal.publisher_informations publisher JOIN publisher_portal.publisher_annual annual\n" +
"ON publisher.publisher_name=annual.publisher_name where publisher.publisher_name= :publisherName",
resultSetMapping = "PublisherInfoResponseMappings"
)

})

@SqlResultSetMapping(name = "PublisherInfoResponseMappings", entities = {
@EntityResult(entityClass = PublisherInfoResponseEntity.class, fields = {
@FieldResult(name = "publisher_name", column = "publisher_name"),
@FieldResult(name = "contact_name", column = "contact_name"),
@FieldResult(name = "contact_phone", column = "contact_phone"),
@FieldResult(name = "contact_email", column = "contact_email"),
@FieldResult(name = "managed_services", column = "managed_services"),
})
})


@Entity
@Table(name="publisher_informations",schema="publisher_portal")
public class PublisherInfoResponseEntity {


@Id
private Long id;

private String publisher_name;

private String contact_name;

private String contact_phone;

private String contact_email;

private String managed_services;

//setters and getters


}

Answer 1

查看是否要排除 resulset 中的某些列，只需在该特定列上使用 @Jsongnore 实体类中的列/字段。

所以解决办法是

在查询和结果集中包含主键，然后在主键上使用@Jsongnore，这样准备好的结果集就没有字段ID。

注意您可以在字段或 getters 方法中应用 @Jsongnore

举例

@NamedNativeQueries(value = {
@NamedNativeQuery(
name = "getPublisherInfoList",
query = "SELECT publisher.id,publisher.publisher_name,publisher.contact_name,publisher.contact_email,publisher.contact_phone,publisher.managed_services,\n" +
         "annual.customers,annual.employees,annual.revenue,"
     "FROM publisher_portal.publisher_informations publisher JOIN publisher_portal.publisher_annual annual\n" +
"ON publisher.publisher_name=annual.publisher_name",

resultSetMapping = "PublisherInfoResponseMappings"
),

@NamedNativeQuery(
name = "getPublisherByName",
query = "SELECT publisher.id,publisher.publisher_name,publisher.contact_name,publisher.contact_email,publisher.contact_phone,\n" +
"publisher.managed_services,annual.customers,annual.employees,annual.revenue,\n" +
"FROM publisher_portal.publisher_informations publisher JOIN publisher_portal.publisher_annual annual\n" +
"ON publisher.publisher_name=annual.publisher_name where publisher.publisher_name= :publisherName",
resultSetMapping = "PublisherInfoResponseMappings"
)

})

@SqlResultSetMapping(name = "PublisherInfoResponseMappings", entities = {
@EntityResult(entityClass = PublisherInfoResponseEntity.class, fields = {
@FieldResult(name = "id", column = "id")
@FieldResult(name = "publisher_name", column = "publisher_name"),
@FieldResult(name = "contact_name", column = "contact_name"),
@FieldResult(name = "contact_phone", column = "contact_phone"),
@FieldResult(name = "contact_email", column = "contact_email"),
@FieldResult(name = "managed_services", column = "managed_services"),
})
})


@Entity
@Table(name="publisher_informations",schema="publisher_portal")
public class PublisherInfoResponseEntity {

@Id
@Jsongnore
private Long id;

private String publisher_name;

private String contact_name;

private String contact_phone;

private String contact_email;

private String managed_services;

//setters and getters


}

注意：假设 entityManager.createNamedQuery(..) 已经生成