Fluent NHibernate 表每个子类保存

发布于 2024-10-07 01:19:12 字数 763 浏览 2 评论 0原文

这是我的设置：

public class Parent
{
    public virtual int Id { get; protected set; }
    public virtual Property1 { get; set; }
}

public class Child : Parent
{
    public virtual Property2 { get; set; }
}

public sealed class ParentMap : ClassMap<Parent>
{
    public ParentMap()
    {
        Id( m => m.Id );
        Map( m => m.Property1 );
    }
}

public sealed class ChildMap : SubclassMap<Child>
{
    public ChildMap()
    {
        KeyColumn( "ParentId" );
        Map( m => m.Property2 );
    }
}

这对于检索数据非常有用。我该如何保存这个呢？我想在附加到父级的数据库中创建一个新的子记录。如果我创建一个具有相同父值的新子类并保存，我会收到错误消息，指出具有相同标识符值的不同对象已与实体：Child 的会话：2 关联

我猜这是有道理的，但是如何创建一个在数据库中具有相同父级的新子级？

也许这是不可能的，我应该只做从父母到孩子的一对多。

原文

This is my setup:

public class Parent
{
    public virtual int Id { get; protected set; }
    public virtual Property1 { get; set; }
}

public class Child : Parent
{
    public virtual Property2 { get; set; }
}

public sealed class ParentMap : ClassMap<Parent>
{
    public ParentMap()
    {
        Id( m => m.Id );
        Map( m => m.Property1 );
    }
}

public sealed class ChildMap : SubclassMap<Child>
{
    public ChildMap()
    {
        KeyColumn( "ParentId" );
        Map( m => m.Property2 );
    }
}

This works great for retrieving data. How do I go about saving this though? I want to create a new child record in the database that's attached to the parent. If i create a new child class that has the same parent values and save, I get errors saying a different object with the same identifier value was already associated with the session: 2, of entity: Child

I guess that makes sense, but how do I create a new Child that has the same parent in the database?

Maybe this isn't possible and I should just do a one to many from the Parent to the Child.

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