How to POST a document with manual id in MongoDB database from Spring hypermedia-based RESTful front end?

Question

I am following this spring guide: https://spring.io/guides/gs/accessing-mongodb-data-rest/

Everything is perfect, however if I want to POST a document with manual id, I am not able to do that.

Here is what all I have done:

I inserted one document from Mongo shell by the command db.person.insert({"_id": "111111", "firstName" : "Vikas", "lastName" : "Prasad"});

This works fine and if I do a GET at http://localhost:8080/people from Postman, I can see the person document with id 111111 in the response having self href as http://localhost:8080/people/111111

But if I am sending a POST request from Postman at http://localhost:8080/people with body as {"_id": "222222", "firstName" : "Aadish", "lastName" : "Patodi"}, the document is getting inserted with an auto id instead of 222222. Because of which obviously I cant access this docuemnt by doing a GET at http://localhost:8080/people/222222 unlike the case when I used insert() from the shell to insert a document with manual id. Instead I have to hit a GET at http://localhost:8080/people/57bc29ada3fab115cc9b546b to fetch this second document.

Just to check if I am POSTing the {"_id": "222222", "firstName" : "Aadish", "lastName" : "Patodi"} again, its getting inserted again at a new auto generated id: http://localhost:8080/people/57bc2bdaa3fab115cc9b546c. It means MongoDB is not even looking at the _id, else it must have thrown duplicate key error.

I tried searching various sources. All I can found is an implementation of the data access code separately in JAVA at back end and calling respective MongoDB methods.

My question is:

Just like in the given tutorial they are performing every operation without defining any JAVA back end code for data access from MongoDB for auto id documents, is there a way to do the same for manual id documents? Or just for this one use case I have to implement the data access code at the back end?

I am using CorsFilter to handle cross origin requests.

Edit:

Below is the Person class:

package hello;

import org.springframework.data.annotation.Id;

public class Person {

    @Id private String id;

    private String firstName;
    private String lastName;

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }
}

I have tried:

-> adding getter and setter for id attribute

-> renaming id to employeeNumber

-> renaming id to employeeNumber and adding getter and setter for employeeNumber

None of the above three solved the issue.

Answer 1

as discussed on the comment, looks like your _id field is not mapped correctly. Can you check if the _id is mapped correctly in the pojo ?