ObjectId deserializes to Java's native toString()

[Sebastian Gaul]

I use JacksonDBCollection (mongojack 2.0.0-RC1)  to write Java objects to my MongoDB. Classes to be mapped inherit from this implementation:

import org.mongojack.ObjectId;

import com.fasterxml.jackson.annotation.JsonProperty;

public class IdentifiableObject implements Serializable {

private String id;

@ObjectId

@JsonProperty("_id")

public String getId() {

return id;

}

@ObjectId

@JsonProperty("_id")

public void setId(String id) {

this.id = id;

}

}

Basically, this seems to work. An object written to Mongo looks like this:

{ "_id" : ObjectId("512203b24cca3cbcac0fbad6"), ... }

JacksonDBCollection.insert's WriteResult.getSavedId() returns the expected 512203b24cca3cbcac0fbad6. But reading these object from Mongo does not convert the ObjectId as expected:

IdentifiableObject myObj = myJacksonDBCollection.findOneById("512203b24cca3cbcac0fbad6");

System.out.print(myObj.getId()); // prints "de.undercouch.bson4jackson.types.ObjectId@6f45d7f2"

As you can see the ObjectId is converted using Java's native toString or something similar. I want the ID to be 512203b24cca3cbcac0fbad6 again. I hope somebody can tell me why this happens and how I can fix this.

[James Roper]

This looks like a regression... though I thought we had tests for this.  I'll take a look.

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[Sebastian Gaul]

I want to add that I use a slightly modified ObjectMapper. I don't think that this is the problem, but who knows. It uses the original Mongojack configuratior:

ObjectMapper objectMapper = new ObjectMapper();

MongoJacksonMapperModule.configure(objectMapper);

objectMapper.registerModule(new JodaModule());

The additional module is jackson-datatype-joda (https://github.com/FasterXML/jackson-datatype-joda) for Joda time support.

[Phillip Roberts]

+1 on this issue and I'm not using a custom ObjectMapper.  I'm using the simple POJO and get similar output:
Person [id=de.undercouch.bson4jackson.types.ObjectId@ca56214, name=Phillip]

ETA on a fix?  Appreciate the work.

Thanks

[Oddmar Sandvik]

Thanks for this nice little framework. I also have the same issue with the following construct on 2.0.0-RC1.

In 2.0.0-SNAPSHOT, this seems to be fixed. When are you planning a new release candidate?

import javax.persistence.Id;

public class Point {

    @Id

    public String id;

    

    private int x;

    private int y;

    public int getX() {

        return x;

    }

    public int getY() {

        return y;

    }

}

Thanks

Oddmar