Question

My data model:

public class Tour extends Model {    
    @Id
    public Integer id;

    @ManyToOne
    public Sport sport;

    @OneToOne(mappedBy="genericTour")
    FootballTour footballTour;

    @OneToOne(mappedBy="genericTour")
    TennisTour tennisTour;

    public static Finder<Integer, Tour> find(){
        return new Finder<Integer,Tour>(Integer.class,Tour.class);
    }
}

public class FootballTour extends Model {

    @Id
    public Integer id;

    @OneToOne
    Tour genericTour;

    public static Finder<Integer, FootballTour> find(){
        return new Finder<Integer,FootballTour>(Integer.class,FootballTour.class);
    }

}

My action(just to show that I’m fetching “footballTour”):

  public static Result getToursBySportTag(String sportTag){

      Query query = Tour.find().fetch("sport").fetch("footballTour");
      List<Tour> finedTours =  query.where().eq("tag", sportTag).findList();

      return ok(tours.render(finedTours));

  }

In scala template I want to acess footballTour field of Tour:

@(tours: List[Tour])
@main("Football tours") {
<h1>Football tours List</h1>
<dl>
@for(tour <- tours) {
<dt>
<a href="@routes.Application.tour(tour.id)">
@tour.footballTour.id
</a>
</dt>
}
</dl>
}

And have error at compilation time:

[error] one error found [error]
{file:/C:/Users/pc/prog/}prog/compile:compile: C ompilation failed
[info] Compiling 1 Scala source to C:\Users\pc\prog\target\scala-2.
9.1\classes… [error] C:\Users\pc\prog\target\scala-2.9.1\src_managed\main\views\
html\tours.template.scala:37: variable footballTour in class Tour
cannot be acce ssed in models.Tour [error]
“””),display(SeqAny),format.raw/8.11/(“””
– “””),display(SeqAny),format.raw/8.
35/(“”” [error]

Answer 1

The field genericTour of the FootballTour class should be public:

public class FootballTour extends Model {

    @Id
    public Integer id;

    @OneToOne
    public Tour genericTour;  // <<<<< Here !!

    public static Finder<Integer, FootballTour> find(){
        return new Finder<Integer,FootballTour>(Integer.class,FootballTour.class);
    }

}

In java, by default, in not specified, the fields are private.