Question

我尝试在Mongodb的Spring Boot中使用简单的CRUD。我的身份证号码有问题。如何自动增加ID。 I tried but couldn't do it

有没有简单的自动递增方式？

控制器

@Autowired
EmployeeRepo repo;

@RequestMapping(value = "home", method = RequestMethod.GET)
public String getHomePage(Model model) {

    Employee employee = new Employee();

    employee.setId(1);
    employee.setName("deniz");
    employee.setPassword("123");

    repo.save(employee);  

    ...

员工

@Document(collection = "Employee")
public class Employee {

@Id
private long id;

private String name;
private String password; 

// getter and setter

Answer 1

  public long getNextSequenceId(String key) {

    Query query = new Query(Criteria.where("_id").is(key));

        Update update = new Update();
    update.inc("seq", 1);

    FindAndModifyOptions options = new FindAndModifyOptions();
    options.returnNew(true);

    SequenceId seqId = 
            mongoOperation.findAndModify(query, update, options, SequenceId.class);

    return seqId.getSeq();

  }

如何在Spring Boot中自动增加mongo db？

1 个答案: