Question

I’m using Play! 1.2.4 + Morhpia / MongoDB.

My models are Salons and Stylists which share a many to many relationship. I am however unable to define the test data correctly to represent this relationship.

Here’s what I have done

Salon(salon1):
  name: salon1
  city: singapore
  country: singapore

Stylist(stylist1):
  firstName: stylist1
  lastName: stylist1
  title: Stylist 1
  price: $100
  salons: [salon1]

With this data, the stylist contains the reference to the salon but not vice-versa.

How to achieve two way referencing?

Thanks,
Sri

---

Here are the model classes ..

@Entity("salons")
public class Salon extends Model {
  // ...
  @Reference
  @ManyToMany
  public List<Stylist> stylists;
  // ...
}

@Entity("stylists")
public class Stylist extends Model {
  // ..
  @Reference
  @ManyToMany
  public List<Salon> salons;
  // ..
}

Answer 1

What do you mean by two way referencing?

If you mean you want to be able to access Stylists from your Salon entity in code, then you will need to have something like this:

public class Salon extends Model {

    @ManyToMany
    @JoinTable(name = "salon_stylist", ...)
    public List<Stylist> stylists;

    ...
}

And your Stylist entity can look like this:

public class Stylist extends Model {

    @ManyToMany
    @JoinTable(name = "salon_stylist", ...)
    public List<Salon> salons;

    ...
}        

Then your yml can look like this:

Salon(salon1):
  name: salon1
  city: singapore
  country: singapore

Salon(salon2):
  name: salon2
  city: tokyo
  country: japan

Stylist(stylist1):
  firstName: stylist1
  lastName: stylist1
  title: Stylist 1
  price: $100
  salons: 
    - salon1
    - salon2

Just saying that stylist1 belongs to salon1 and salon2 should be enough in the yml (i.e. you shouldn’t have to declare the same in the two salon yml entries).