How to convert MongoDB Document to POJO that contains both _id & id fields?

Working with Data Drivers
,
1

If I have MongoDB documents with both _id & id fields how do I convert those to POJO using PojoCodecProvider?

I have tried:

 PojoCodecProvider.Builder pojoCodecProviderBuilder = PojoCodecProvider.builder()
                .automatic(true)
                .conventions(asList(org.bson.codecs.pojo.Conventions.ANNOTATION_CONVENTION));

With POJO annotated as:

public class MyModel {

    @BsonProperty("_id")
    public ObjectId _id;

    @BsonProperty("id")
    private String id;
	
	@BsonProperty("id")
    public String getId() {
        return id;
    }

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

However the _id is null, only the id and other fields are set. I need all fields including the _id field to be set. How can I do this?

Thanks,
David

3

Hi @David_Hoffer and welcome to the MongoDB Community forum!!

Here is how my POJO class looks like to insert _id and id together:

public class Test {

    @BsonProperty("_id")
    public ObjectId _id;

    @BsonProperty("id")
    private String id;

    public Test(ObjectId objectId, String testing2) {
        this._id= objectId;
        this.id = testing2;
    }

    @Override
    public String toString(){
        return "Details ['_id= + _id +, id=' + id ']";
    }

    public ObjectId get_id() {
        return _id;
    }

    public void set_id(ObjectId _id) {
        this._id = _id;
    }

    public String getId() {
        return id;
    }

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

And the codec that I have been using looks like the following:

public static void main(String[] args) {
        CodecProvider pojoCodecProvider = PojoCodecProvider.builder().automatic(true).build();
        CodecRegistry pojoCodecRegistry = fromRegistries(getDefaultCodecRegistry(), fromProviders(pojoCodecProvider));

I tried to create one constructor and insert _id and id together into the document.

Let me know if this answers your question.

Best regards
Aasawari