Spring 数据 Jpa 与 where 子句的一对一映射

Question

我有两个表，我需要使用 where 子句进行 OneToOne 映射。

select * from person_details inner join address_details
on address_details.pid=person_details.pid AND person_details.exist_flag = 'Y' AND address_details.address_exist_flag = 'Y'

Table 1

public class PersonDetails {
    @Id
    private String pid;

    @Column(name = "first_name")
    private String firstName;

    @Column(name = "last_name")
    private String lastName;

    @Column(name = "exist_flag")
    private String existFlag;

    @OneToOne(mappedBy = "personDetails", cascade = CascadeType.ALL)
    @Where(clause = "addressExistFlag = 'Y'")
    private AddressDetails addressDetails;
}

Table 2

@Data
@NoArgsConstructor
@Entity
@Table(name = "address_details")
public class AddressDetails {
    @Id
    private String pid;

    private String street;

    @Column(name = "address_exist_flag")
    private String addressExistFlag;

    @OneToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
    @JoinColumn(name = "pid", insertable = false, updatable = false)
    private PersonDetails personDetails;

}

如果 addressExistFlag = 'Y' 和 existFlag = 'Y'.

我需要获取数据

在当前情况下，如果我尝试通过 spring 批量读取存储库获取数据，如下所示，仅考虑 existFlag = 'Y'。 是因为映射不正确还是我在spring批处理中使用的方式

ReadRepository 如下所示

public interface PersonDetailsRepository extends JpaRepository<PersonDetails, String> {
    Page<PersonDetails> findByExistFlag(String existFlag, Pageable pageable);
}

Spring 批量读取存储库如下所示

@Bean
RepositoryItemReader<PersonDetails> personDetailsItemReader() {
    Map<String, Sort.Direction> sort = new HashMap<>();
    sort.put("ExistFlag", Sort.Direction.ASC);
    return new RepositoryItemReaderBuilder<PersonDetails>()
            .repository(personDetailsRepository)
            .methodName("findByExistFlag")
            .arguments("Y")
            .sorts(sort)
            .name("personDetailsItemReader")
            .build();
}

Answer 1

您只是在查询 existsFlag。

您还必须添加另一个标志：

public interface PersonDetailsRepository extends JpaRepository<PersonDetails, String> {
    Page<PersonDetails> findByExistFlagAndAddressDetailsAddressExistFlag(
                        String existFlag, String addressExistFlag, Pageable pageable);
}


@Bean
RepositoryItemReader<PersonDetails> personDetailsItemReader() {
    Map<String, Sort.Direction> sort = new HashMap<>();
    sort.put("ExistFlag", Sort.Direction.ASC);
    return new RepositoryItemReaderBuilder<PersonDetails>()
            .repository(personDetailsRepository)
            .methodName("findByExistFlagAndAddressDetailsAddressExistFlag")
            .arguments("Y", "Y")
            .sorts(sort)
            .name("personDetailsItemReader")
            .build();
}

Spring 数据 Jpa 与 where 子句的一对一映射

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