strange lazy loading failure

[Mike Wood]

I am using some scaffolded services to load some existing domain classes. For some reason when the classes get serialized (JSON) the child objects appear empty. I can inspect them before the resource returns them to be serialized and get values (via log statements). It's very strange. 

My parent class (Job) has two child classes - User and JobStatus. Neither are loaded correctly. In the code below the three log.error statements produce values. The final JSON shows nulls (it does serialize as the object with fields - just all are null). If I replace the jobStatus object as in the commented out line it will serialize values. I've also tried setting the hibernate mapping in Job.groovy to lazy: false. Seems like the job.jobStatus proxy is loaded according to everything except the serialization.

@Consumes(['application/xml','application/json'])

@Produces(['application/xml','application/json'])

class JobResource {

    

    def jobResourceService

    def id

    

    @GET

    Response read() {

        def job = jobResourceService.read(id)

        log.error job.user.username

        log.error job.jobStatus

        // job.jobStatus = JobStatus.get(job.jobStatus.id)

        log.error job.jobStatus

        ok job

    }

[Mike Wood]

I need to correct myself. If I add lazy: false in the mapping it does work correctly (i.e. the child object will serialize correctly). Shame to have to force this at the ORM level though.

@JsonAutoDetect(fieldVisibility=JsonAutoDetect.Visibility.NONE,

                getterVisibility=JsonAutoDetect.Visibility.NONE,

                isGetterVisibility=JsonAutoDetect.Visibility.NONE)

class Job implements Serializable

{

    static belongsTo = [user: User]

    @JsonProperty('id')

    Integer id

    .....

    @JsonProperty('user')

    User user;

    static mapping = {

        ....

        user(lazy: false)

    }

}