Question

是否可以在不需要其他字段的情况下更新Student对象的单个字段？可以说我要更新成绩字段。

import com.ahmetk.redis.redishll.model.Student;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;


@Repository
public interface StudentRepository extends CrudRepository<Student, String> {}


@RedisHash("Student")
@Data
@Getter
@Setter
@AllArgsConstructor
public class Student implements Serializable {

   public enum Gender {
      MALE, FEMALE
   }

   private String id;
   private String name;
   private Gender gender;
   private int grade;

   @Override
   public String toString() {
      return "Student{" + "id='" + id + '\'' + ", name='" + name + '\'' + ", gender=" + gender + ", grade=" + grade + '}';
   }
}



    @Test
    public void whenDeletingStudent_thenNotAvailableOnRetrieval() throws Exception {
        final Student student = new Student("Eng2015001", "John Doe", Student.Gender.MALE, 1);
        studentRepository.save(student);
        studentRepository.delete(student.getId());
        final Student retrievedStudent = studentRepository.findOne(student.getId());
        assertNull(retrievedStudent);
    }

Answer 1

您可以看一下-https://docs.spring.io/spring-data/data-redis/docs/current/reference/html/#redis.repositories.partial-updates

文档中示例中的模板是RedisKeyValueTemplate的实例

@Autowired
private RedisKeyValueTemplate redisKVTemplate;
redisKVTemplate.update(entity)

在Redis中更新哈希的单个字段

1 个答案: