向关联添加约束

Question

这是我在用户和帖子之间建立一对多关系的交易

@Entity
public class User extends Model {
...
  @OneToMany(cascade = CascadeType.ALL, targetEntity = Post.class, mappedBy = "author")
  @OrderBy("createdAt DESC")
  public List<Post> posts;
...
}

@Entity
public class Post extends Model {
...
  public int privacy; // 0=public, 1=private
  @ManyToOne
  public User author;
...
}

效果很好...现在我想检索用户的公开帖子？当然，遍历结果并删除私人帖子不是一种选择，我最终需要做一些分页，那会很头疼。是否有一些注释可以帮助我解决这个问题？

Answer 1

这样的？

User author = User.findById(1);  
int pageNumber = 1;
int pageSize = 10;
Post.find("FROM Post WHERE author = ? AND privacy = 0", author).fetch(pageNumber, pageSize);