自引用表的 Yaml

Question

我的模型定义如下：

public class Link extends Model {

    @Required
    public String tag;
    @Required
    public String type;
    @Required
    public int weight;

    @ManyToOne(cascade = CascadeType.ALL)
    public Link parent;

    @OneToMany(mappedBy = "parent", cascade = CascadeType.ALL)
    public List<Link> children;

    @ManyToMany(cascade = CascadeType.PERSIST)
    public List<Tag> tags;
}

我无法为 yaml 中的前两项指定父项来竞争我的数据

Link(m):
   tag: m
   type: home
   weight: 1
   tags:
         - tagH
         - tagM

Link(hh):
   tag: hh
   type: home
   weight: 2
   tags:
         - tagH
         - tagHH

artoo.Link(focus):
   tag: focus
   type: footer
   weight: 1
   tags:
          - tagTechnology
          - tagLegal
   children:
             - m
             - hh

Answer 1

链接到链接父子关系的所有权位于子对象上。所有权由mappedBy-parameter中定义，

@OneToMany(mappedBy = "parent", cascade = CascadeType.ALL)

因此您应该首先在YAML中声明您的父对象，并省略父对象中的“children”字段。然后，您可以在父对象声明之后添加子对象声明，并向

parent: focus

子对象添加字段。它应该是这样的：

Link(focus):
    ...

Link(m):
    parent: focus

Link(hh):
    parent: focus