Ebean Query by OneToMany Relationship

Question

I\'m using Ebean with the Play 2 Framework and got two models: a user model and a book model. The user model is connected with the book model in a OneToMany Relationship. So

Answer 1

Say you have the following models:

@Entity
public class User extends Model {
  @Id
  @Column(name = "user_index")
  private int id;

  @Column(name = "user_first_name")
  private String firstName;

  [...]

  @OneToMany(mappedBy = "book_owner_index")
  private List books;

  public static Finder find = new Finder(Integer.class, User.class);

  [...]
}

and

@Entity
public class Book extends Model {
  @Id
  @Column(name = "book_index")
  private int id;

  @Column(name = "book_name")
  private String name;

  @Column(name = "book_condition")
  private String condition;

  [...]

  @ManyToOne
  @JoinColumn(name = "book_owner_index", referencedColumnName = "user_index")
  private User owner;

  [...]
}

Then you can do a search like:

List users = User.find.select("*")
                            .fetch("books")
                            .where()
                            .eq("books.condition", "new")
                            .findList();