我正在嘗試使用FluentNHibernate AutoMappings來創建一個參考其父項的實體。我可以在ClassMap <>的幫助下做到這一點,但現在我想將所有內容都移動到AutoMappings。我有以下架構表:如何使用流暢的nhibernate自動映射引用同一個表中的父實體?
CREATE TABLE [dbo].[Job]
(
[Id] INT NOT NULL IDENTITY(1,1),
[ParentId] INT NULL,
PRIMARY KEY ([Id]),
CONSTRAINT [FK_Job_Parent] FOREIGN KEY ([ParentId]) REFERENCES [Job]([Id])
)
而下面的C#代碼:
using FluentNHibernate;
using FluentNHibernate.Automapping;
using FluentNHibernate.Cfg;
using FluentNHibernate.Cfg.Db;
using FluentNHibernate.Conventions;
using FluentNHibernate.Conventions.Instances;
using System;
using System.Configuration;
namespace NHibernateTest
{
public class Program
{
private static void Main(string[] args)
{
var sessionFactory = Fluently.Configure()
.Database(MsSqlConfiguration.MsSql2008.ConnectionString(ConfigurationManager.ConnectionStrings["Default"].ConnectionString))
.Mappings(m =>
{
m.AutoMappings.Add(
AutoMap.AssemblyOf<Program>(new MappingConfig()).Conventions.Setup(conv =>
{
conv.Add<DefaultReferenceConvention>();
conv.Add<DefaultHasManyConvention>();
conv.Add<SimpleForeignKeyConvention>();
}));
})
.BuildSessionFactory();
using (var session = sessionFactory.OpenSession())
{
using (var tran = session.BeginTransaction())
{
var jobs = session
.QueryOver<Job>()
.List<Job>();
tran.Commit();
}
}
}
}
public class Job
{
public virtual int Id { get; set; }
public virtual Job Parent { get; set; }
}
public class MappingConfig : DefaultAutomappingConfiguration
{
public override bool ShouldMap(Type type)
{
return type == typeof(Job);
}
}
public class SimpleForeignKeyConvention : ForeignKeyConvention
{
protected override string GetKeyName(Member property, Type type)
{
if (property == null)
{
return type.Name + "Id";
}
return property.Name + "Id";
}
}
public class DefaultHasManyConvention : IHasManyConvention
{
public void Apply(IOneToManyCollectionInstance instance)
{
instance.Key.Column(string.Format("{0}{1}", instance.EntityType.Name, "Id"));
instance.LazyLoad();
}
}
public class DefaultReferenceConvention : IReferenceConvention
{
public void Apply(IManyToOneInstance instance)
{
var col = string.Format("{0}Id", instance.Class.Name);
instance.Column(col);
instance.LazyLoad();
}
}
}
我越來越:
是在創建一個會話使用了無效的或不完整的配置。請參閱PotentialReasons集合和InnerException以獲取更多詳細信息。
外鍵(FK7D5D63A6AE42E0BA:作業[的JobId,的ParentId]))必須有相同數量的被引用的主鍵列(作業[ID])
有沒有辦法做到這一點使用自動映射只要?