FlexJson deserialize object reference

Question

I'm using Spring Roo which generated set of hibernate and FlexJSON classes.

I have entity called Location and entity called Comment. Location has many comments (1:M).

I'm trying to generate JSON object, which will, when deserialized and inserted reference existing Location object.

When I omit location field, everything is working fine, for example:

{ 
   "date": 1315918228639, 
   "comment": "Bosnia is very nice country" 
}

I don't know how to reference location field. I've tried following, but with little success:

{
   "location": 10,  
   "date": 1315918228639, 
   "comment": "Bosnia is very nice country" 
}

where location id is 10.

How can I reference location field in the JSON?

Edit: Added Comment entity:

@RooJavaBean
@RooToString
@RooJson
@RooEntity
public class Komentar {

    private String comment;

    @ManyToOne
    private Location location;

    @Temporal(TemporalType.TIMESTAMP)
    @DateTimeFormat(style = "M-")
    private Date date;

}

Answer 1

I've solved issue by adding transient property.

@Transient
public long getLocationId(){
    if(location!=null)
        return location.getId();
    else 
        return -1;
}

@Transient
public void setLocationId(long id){
    location = Location.findLocation(id);
}