流利的 NHibernate 没有在 HasMany 中保存外键。 该列仍然是 null

Question

我正在努力在我的映射中使用外键。

我的 Model 看起来像这样：

 public class Accountant: Entity
    {
        public virtual string Name { get; set; }
        public virtual IList<Company> Companies { get; set; }

    }

    public class Company: Entity
    {
        public virtual string Name { get; set; }
        public virtual Subscriber Subscriber { get; set; }
        public virtual Accountant Accountant { get; set; }
        public virtual Funder Funder { get; set; }  
    }

我的映射看起来像这样

     public class AccountantMap : ClassMap<Accountant>
    {
        public AccountantMap()
        {
            Id(x => x.Id);
            Map(x => x.Name);

            HasMany(x => x.Companies)
               .Inverse()
              .Cascade.All();

            Table("tblAccountant");
        }
    }
 public class CompanyMap : ClassMap<Company>
    {
        public CompanyMap()
        {
            Id(x => x.Id);
            Map(x => x.Name);

            References(x => x.Subscriber).Cascade.SaveUpdate();
            References(x => x.Accountant).Cascade.SaveUpdate();
            References(x => x.Funder).Cascade.SaveUpdate();

            Table("tblCompany");
        }
    }

因此，我正在尝试做的是，我正在尝试保存会计 Object 并且它必须更新表 tblCompany 中的外键

这是我的保存方法的样子

    public void Create_Accountant()
        {

            var repo = new Repository();

            var companies = new List<Company>();

            companies.Add(repo.GetById<Company>(new Guid("02032BD9-2769-4183-9750-AF1F00A5E191")));
            companies.Add(repo.GetById<Company>(new Guid("F86E8B40-73D2-447E-A525-AF1F00A5E191")));

            var accountant = new Accountant
            {
                Name = "Accountant Simba",
Companies= companies
            };

            repo.Save(accountant);

        }

   public void Save<T>(T entity) where T: Entity
        {
            using (var session = _factory.OpenSession())
            {
                using (var transaction = session.BeginTransaction())
                {
                    try
                    {
                        session.SaveOrUpdate(entity);
                        session.Flush();
                        transaction.Commit();
                        //return entity.Id;

                    }
                    catch (Exception)
                    {
                        transaction.Rollback();
                        throw;
                    }
                }
            }
        }

代码执行后，这就是我的数据库中的内容

数据库结果

您会注意到 Account_id 列是空的，它不应为空。

有人，请帮助我，我做错了什么？

Answer 1

引用未设置，但Inverse()告诉 NHibernate 使用引用。 将代码更改为此，然后您就不会忘记设置它了。

public class Accountant : Entity
{
    public Accountant()
    {
        Companies = new ParentAwareCollection<Company>(c => c.Accountant = this, c => c.Accountant = null);
    }
    public virtual string Name { get; set; }
    public virtual IList<Company> Companies { get; protected set; }
}

public sealed class ParentAwareCollection<TChild> : Collection<TChild>
{
    private readonly Action<TChild> _setParent;
    private readonly Action<TChild> _removeParent;

    public ParentAwareCollection(Action<TChild> setParent, Action<TChild> removeParent)
    {
        _setParent = setParent;
        _removeParent = removeParent;
    }

    protected override void InsertItem(int index, TChild item)
    {
        base.InsertItem(index, item);
        _setParent(item);
    }
    protected override void RemoveItem(int index)
    {
        TChild removedItem = this[index];
        _removeParent(removedItem);
        base.RemoveItem(index);
    }

    protected override void ClearItems()
    {
        foreach (var item in this)
        {
            _removeParent(item);
        }
        base.ClearItems();
    }
}

和用法

    var accountant = new Accountant
    {
        Name = "Accountant Simba",
        Companies = 
        {
            repo.GetById<Company>(new Guid("02032BD9-2769-4183-9750-AF1F00A5E191")),
            repo.GetById<Company>(new Guid("F86E8B40-73D2-447E-A525-AF1F00A5E191"))
        }
    };