spring - Redis @Reference 在 Spring Data Redis 中不起作用

Question

我在 Spring Boot + Spring Data Redis 中实现 @Reference 时遇到问题。 Address 是 Employee 中的一个列表，当我保存 office 和 home 地址时，我希望数据能够与 Employee 一起保存。但数据未保存，因此无法使用 street 搜索 Address。

员工.java

@Builder
@Data
@AllArgsConstructor
@NoArgsConstructor
@RedisHash("employees")
public class Employee {
    @Id @Indexed
    private String id;
    private String firstName;
    private String lastName;

    @Reference
    private List<Address> addresses;
} 

地址.java

@Builder
@Data
@AllArgsConstructor
@NoArgsConstructor
@RedisHash("address")
public class Address {
    @Id
    private String id;
    @Indexed
    private String street;
    private String city;
}

测试类

@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest
public class EmployeeAdressTest extends RepositoryTestSupport{
    @Autowired private EmployeeRepository employeeRepository;


    @Before
    public void setUp() throws JsonProcessingException {
        Address home = Address.builder().street("ABC Street").city("Pune").build();
        Address offc = Address.builder().street("XYZ Street").city("Pune").build();

        Employee employee1 = Employee.builder().firstName("Raj").lastName("Kumar").addresses(Arrays.asList(home, offc)).build();
        employeeRepository.save(employee1);


        List<Employee> employees = employeeRepository.findByAddresses_Street("XYZ Street");
        System.out.println("EMPLOYEE = "+employees);
    }

    @Test
    public void test() {

    }
}

Spring 文档:

8.8. Persisting References
Marking properties with @Reference allows storing a simple key reference instead of copying values into the hash itself. On loading from Redis, references are resolved automatically and mapped back into the object, as shown in the following example:

Example 30. Sample Property Reference
_class = org.example.Person
id = e2c7dcee-b8cd-4424-883e-736ce564363e
firstname = rand
lastname = al’thor
mother = people:a9d4b3a0-50d3-4538-a2fc-f7fc2581ee56      
Reference stores the whole key (keyspace:id) of the referenced object.

?

Answer 1

Spring Data Redis 要求您将存储在 home 和 office 中的对象与引用对象 employee1 分开保存。

这是(现在)在第 8.8 章末尾的官方文档中说明的:https://docs.spring.io/spring-data-redis/docs/current/reference/html/#redis.repositories.references

因此，如果您在保存 employee1 之前将 home 和 office 保存到数据库中，您应该没问题。

同样的顺便说一句适用于您稍后对引用对象所做的更新。仅保存引用对象并不会保存对引用对象的更新。