Spring Data JPA Redis:无法编写基于自定义方法的查询

时间:2018-06-29 12:31:42

标签: spring-boot redis java-8 spring-data-jpa spring-repositories

我已经使用Redis配置了Spring Data JPA,并使用RedisRepositoriesfind()findAll()等提供的方法。所有这些方法似乎都可以正常工作,但是我无法像这样写我的自定义方法。

  

RedisEntity findByGenderAndGrade(字符串性别,字符串等级);

RedisEntity是一个简单的POJO Entity类。如果您需要更多信息,请在邮件中告诉我。

以下是我的实体:

@Data
@RedisHash("test1")
public class RedisEntity implements Serializable {

    @Id
    @GeneratedValue
    private String id;
    private String name;
    private String gender;
    private Integer grade;
}

存储库:

@Repository
public interface TestRepository extends JpaRepository<RedisEntity, String> {

    List<RedisEntity> findAllByGender(String gender);
    List<RedisEntity> findAllByGrade(Integer grade);
}

服务/控制器:

        @Override
        public List<RedisEntity> getById(String id) {
            return testRepository.findById(id); //returns data perfectly.
        }
        @Override
        public List<RedisEntity> getAllByGender(String gender) {
            return testRepository.findAllByGender(gender); //returns [] 
        }

        @Override
        public void saveEntity(RedisEntity redisEntity) {
            testRepository.save(redisEntity); // saves it in redis perfectly.
        }

另外, findByGender和findAllByGender都给出[],尽管我可以在我的Redis数据库中看到数据并将其保存。

按照FrançoisDupire的要求,

@Configuration
public class RedisConfig {

    @Autowired
    private DeploymentProperties deploymentProperties;

    private static Logger logger = LoggerFactory.getLogger(RedisConfig.class);

    @Bean
    JedisConnectionFactory jedisConnectionFactory() {
        RedisStandaloneConfiguration redisStandaloneConfiguration = new RedisStandaloneConfiguration("localhost", 6379);
        redisStandaloneConfiguration.setPassword(RedisPassword.of("root"));
        return new JedisConnectionFactory(redisStandaloneConfiguration);
    }

    @Bean
    public RedisTemplate<String, Object> redisTemplate() {
        RedisTemplate<String, Object> template = new RedisTemplate<>();
        template.setConnectionFactory(jedisConnectionFactory());
        return template;
    }
}

我还引用了这篇文章:Baeldung article on Spring data redis

2 个答案:

答案 0 :(得分:0)

我们有Spring Data Redis库,它提供了编写自定义方法的范围。附加示例代码。

<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-redis</artifactId>
    <version>2.0.8.RELEASE</version>
</dependency>

实体定义

@Data
@RedisHash("EmployeeDetails")
public class RedisEntity {

    @Id
    private String employeeId;

    private String firstName;

    private String lastName;

    private String gender;

    private String grade;

}

存储库定义

@Repository
public interface RedisEntityRepository extends CrudRepository<RedisEntity, String>{

    List<RedisEntity>  findAllByGenderAndGrade(String gender, String grade);
}

实施

@Component
public class RedisEntityImpl implements RedisEntityService {

    @Autowired
    private RedisEntityRepository redisEntityRepository;

    @Override
    public List<RedisEntity> getAllByGenderAndGrade(String gender, String grade) {
        return redisEntityRepository.findAllByGenderAndGrade(gender,grade);
    }
}

属性

spring.cache.type = redis
spring.redis.host = localhost
spring.redis.port = 6379

答案 1 :(得分:0)

正如@JoshJ 所提到的,并由我自己和其他人验证, 问题的解决方法是:

添加@Indexed 注释 到所有需要与所有发现一起使用的列/字段。

@Data
@RedisHash("EmployeeDetails")
public class RedisEntity {

 @Id
 private String employeeId;

 private String firstName;

 private String lastName;

 @Indexed
 private String gender;

 @Indexed
 private String grade;

}