find.all在Ebean

Question

我正在关注How can I sort related entities in Ebean?，但我收到了此错误

 RuntimeException: Can not find Master [class models.Card] 
 in Child[models.FinalMark]    

解决方案忘了放这个吗？即使ID不能正常工作。

@Id
public Integer id;

我认为我的情况非常相似。

@Entity
public class Club extends Model {
    @Id
    public Long id;
    public String name;

    @OneToMany(cascade = CascadeType.ALL)
    @OrderBy("name asc")
    public List<Male> male = new ArrayList<>();

    @OneToMany(cascade = CascadeType.ALL)
    @OrderBy("name asc")
    public List<Female> female = new ArrayList<>();

    private static Finder<Long, Club> find = 
    new Finder<>(Long.class, Club.class);
}

@Entity
public class Male extends Model {
  @Id
  public Long id;
  public String name;
  private static Finder<Long, Male> find = new Finder<>(Long.class, Male.class);
}

@Entity
public class Female extends Model {
  @Id
  public Long id;
  @ManyToOne
  public Club club;
  public String name;
  private static Finder<Long, Female> find = new Finder<>(Long.class, Female.class);
}

我有初始数据

male:
- !!models.Male &m1
    name:           "Martin"

- !!models.Male &m2
    name:           "Alan"

female:
- !!models.Female &f1
    name:           "June"

- !!models.Female &f2
    name:           "Babe"


club:
- !!models.Club
    name:           "BigClub"
    male:
    - *m1
    - *m2
    female:
    - *f1
    - *f2

在初始化期间。

    Map<String, List<Object>> all = (Map<String, List<Object>>) Yaml
                    .load("initial-data.yml");

   // Insert club
   Ebean.save(all.get("club"));

当我打电话给Club.find.all（）时，男性和女性的领域仍然没有提升。我尝试了两种不同的方式（每种方式都是男性和女性）。两者也没有在asc中排序。任何想法？

Answer 1

在配置order-by时需要指定相关对象的“路径”，如下所示：

@OneToMany(cascade = CascadeType.ALL)
@OrderBy("male.name asc")
public List<Male> male = new ArrayList<>();

@OneToMany(cascade = CascadeType.ALL)
@OrderBy("female.name asc")
public List<Female> female = new ArrayList<>();

否则，它认为您指的是当前类的“name”字段。