CODEWITHSUNDEEP
springmongodbspring-dataspring-data-mongodb
Sasanka Panguluri
Sasanka Panguluri

Reputation: 3128

Spring MongoRepository query adding _class field to queries

I have a domain class called User. It uses an object of MyUserId as the Id

@Document(collection = "users")
public class User implements Serializable {
    @Property
    @Id
    private MyUserId id;
    @Version
    private Integer version;

    private String firstName;
// Setters, getters 
}

The MyUserId class:

public class MyUserId implements Serializable{
    @Property
    private String userId;
    @Property
    private String sampleId;
// setters, getters
    }

Inside my Mongo, documents are getting stored as {_id:{userId:....., sampleId:....}, <more fields here>}

My userRepository is like this:

public interface UserRepository extends MongoRepository<User, MyUserId> {
    @Query("{'_id': {$in: ?0}}")
    List<User> findByUserIds(Collection<MyUserId> userIds);
}

When I'm querying my userRepository, The query is being fired as:

{_id:  {$in: [ {_class:"com.sampleuser.MyUserId", userId:"....", sampleId:"...."}, {_class:"com.sampleuser.MyUserId", userId:"....", sampleId:"...."}]}}

It's obvious that it's adding the _class field while querying, but not while storing. Can someone throw some light at how to fix this? It's causing all my queries to fail. Thank you!

Upvotes: 0

Views: 1838

Answers (1)

Christoph Strobl
Christoph Strobl

Reputation: 6736

There actually exists an issue when using @Query whith complex id types. I'd suggest to use a custom repository implementation until DATAMONGO-1078 is resolved.

Within the custom implementation you could use MongoTemplate to execute the query somehow like this

@Override
public List<User> findByUserIds(Collection<MyUserId> userIds) {
    return template.find(query(where("id").in(userIds)), User.class);
}

Upvotes: 1

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