如何通过 Fluent nHibernate 将记录插入自引用 table？

Question

我用 Fluent nhibernate 创建了一个自引用类别 Table [MsSQL 2012]，在测试期间，我只是通过 SSMS 手动添加数据； 'but now I wish to do it through code, I’m a little lost?'

public class CategoryMap : ClassMap<CategoryPartRecord> {
    public CategoryMap() {
        Table("Ceck_CategoryPartRecord");
        Id(x => x.Id).GeneratedBy.Native();

        Map(x => x.Name);

        //Relationships-
        // Recursive:
        // [Category]---<[Category]
        References(x => x.ParentCategory)
        HasMany(x => x.Categories)
            .Inverse()
            .Cascade.All();
    }
}

我试过两种方法：

using (var transactionB = session.BeginTransaction())
{
CategoryPartRecord Cat1 = new CategoryPartRecord() { Name = "Exterior" };
CategoryPartRecord Cat2 = new CategoryPartRecord() { Name = "Interior" };
CategoryPartRecord Cat3 = new CategoryPartRecord() { Name = "Garden" };

CategoryPartRecord Cat4 = new CategoryPartRecord() { Name = "Paint" };

Cat1.Categories.Add(Cat4);

session.Save(Cat1);
session.Save(Cat2);
session.Save(Cat3);
transactionB.Commit();
}

.

using (var transactionBB = session.BeginTransaction()) 
{
var Cat = session.Load<CategoryPartRecord>(1); //Contains "Exterior"
CategoryPartRecord Cat2 = new CategoryPartRecord() { Name = "Paint" };

Cat.Categories.Add(Cat2);

session.Save(Cat);
transactionBB.Commit();
}

两者都添加了包含 "Paint" 的新记录，但 link 关系不正确，因为 "CategoryPartRecord_id" 始终为 NULL -- 我是否遗漏了一些非常明显的东西，因为两者都不起作用？

Answer 1

嗯，大胆猜测 - 递归的反转会更有趣，所以要消除任何有趣的行为，请将您的映射更改为这个，让我知道您的进展如何？

        References(x => x.ParentCategory).Cascade.SaveUpdate();

        HasMany(x => x.Categories)
            .Cascade.SaveUpdate();

如何通过 Fluent nHibernate 将记录插入自引用 table？

How to insert records into a Self referencing table via Fluent nHibernate?

c#

sql-server

nhibernate

recursion

fluent-nhibernate