"如何使用 Spring Data 删除 MongoDB 中的记录"

Question

I want to delete an record based on Id in Spring. but in database id value is object EX:-

id: Object(34562341112313)

Answer 1

You do like this:

public void deleteRecord() {
    MongoOperations mongoOperation = (MongoOperations) ctx.getBean("mongoTemplate");
    Query searchQuery = new Query(Criteria.where("id").is(34562341112313));
    mongoOperation.remove(searchQuery, Your_entity_class.class);
    logger.info("Delete success");
}

This is my realistic example:

/**
 * Delete by condition(s).
 */
public void deleteJob() {
    MongoOperations mongoOperation = (MongoOperations) ctx.getBean("mongoTemplate");
    Query searchQuery = new Query(Criteria.where("company").is("DCV"));
    mongoOperation.remove(searchQuery, Job.class);
    logger.info("Đã xóa các công việc đăng bởi DCV.");
}

Source: https://github.com/SmartJobVN/MongoDB_SpringDataMongo/blob/master/src/main/java/vn/smartJob/jobs/MongoSpringJavaConfigApplication.java#L132

Reference: http://docs.spring.io/spring-data/mongodb/docs/current/reference/html/

Answer 2

You should delete it like this:

@Repository
public class AppDaoClass{
    @Autowired
    MongoTemplate mongoTemplate;
    @Override
    public void deleteSomething(String somethingId) {
        mongoTemplate.remove(Query.query(Criteria.where("somethingId").is(somethingId)), Ticket.class);
    }
}

The first "somethingId" is the name you gave it in your model, and the second somethingId is for the Parametar you are giving in you method .

And your Domain Model:

@Document
public class Model {

    @Id
    private String somethingId;
    private String someName;
    private String someOtherName;
}

Be sure to user proper annotations for your classes @Document and @Repository . And add an @Id annotation to your ID field.

Hope this helps.

Answer 3

This is the way you can delete records in spring data mongoDB using MongoTemplate

WriteResult writeResult=mongoTemplate.remove(query,"collection_name");

OR

 WriteResult writeResult=mongoTemplate.remove(query,EntityClassName.class);

You can also use repository Pattern

@Document(collection = "user")
public class User {

@Id
private String id;
private String username;

public String getId() {
    return id;
}

public void setId(String id) {
    this.id = id;
}

public String getUsername() {
    return username;
}

public void setUsername(String username) {
    this.username = username;
}
}

@Repository
public interface UserRepository extend MongoRepository<User, String>{
     public void delete(String id);
     public void delete(User user);
     public void deleteByUsername(String username);
}

you can use these method anywhere to delete records also u can write your custom methods

Answer 4

  @Query(value = "{'_id' : ?0}", delete = true)
  void deleteById(String id);