使用 NHibernate 进行级联更新一对多

Question

我正在努力解决 NHibernate 映射问题。我正在使用 Repository/UnitOfWork 模式，我正在尝试通过更新方法级联持久化我的对象。例如：我可以更改 Foo，添加/更新/删除 Bar 对象，一切都可以。但是当我尝试将 Son 和 Daughter 对象添加到“Bar”并更新 Foo （以持久 Bar 及其子对象）时，Son 和 Daughter 对象不会持久保存到 DB，只有 Foo 和所有 Bars （没有 Son/Daughter 对象） .

public class Foo
{
    public int FooID {get; set;}
    public string Name {get; set;}
    public virtual IList<Bar> Bars {get; set;}    
    public Foo(){}
}    
public class Bar
{
    public int BarID {get; set;}
    public string Name {get; set;}
    public Foo Foo {get; set;}
    public virtual IList<Son> Sons {get; set;}
    public virtual IList<Daughter> Daughters {get; set;}
    public Bar(){}
}    
public class Son
{
    public int SonID {get; set;}
    public string Name {get; set;}
    public virtual Bar Bar {get; set;}
    public Son(){}
}    
public class Daughter
{
    public int DaughterID {get; set;}
    public string Name {get; set;}
    public virtual Bar Bar {get; set;}
    public Daughter(){}
}    

//on Foo.hbm.xml I have:
...
<bag name="Bar" table="Bar" inverse="true" cascade="all-delete-orphan" lazy="false">
  <key column="FooID" />
  <one-to-many class="Bar" />
</bag>

//on Bar.hbm.xml I have
...
<many-to-one name="Foo" column="FooID" class="Foo" lazy="false" />
<bag name="Son" table="Son" inverse="true" cascade="all-delete-orphan" lazy="false">
  <key column="SonID" />
  <one-to-many class="Son" />
</bag>

<bag name="Daughter" table="Daughter" inverse="true" cascade="all-delete-orphan" lazy="false">
  <key column="DaughterID" />
  <one-to-many class="Daughter" />
</bag>

//on Son/Daughter.hbm.xmlI have
...
<many-to-one name="Bar" column="BarID" class="Bar" lazy="false" />

我哪里做错了？提前谢谢！

Answer 1

试试下面的测试：

    var newFoo = new Foo();
    var newBar = new Bar();
    var newSon = new Son();

    _session.Save(newBar);

    newSon.Bar = newBar;
    newBar.Sons.Add(newSon);
    Foo.Bar = newBar;