我定义了一个简单的 Bug 类:
using System;
namespace BugNS.Entities
{
class Bug
{
public virtual int Id { get; private set; }
public virtual int BugNumber { get; set; }
}
}
和一个简单的映射器类:
using System;
using FluentNHibernate.Mapping;
using BugNS.Entities;
namespace BugNS.Mappings
{
class BugMap : ClassMap<Bug>
{
public BugMap()
{
Id(b => b.Id);
Map(b => b.BugNumber);
}
}
}
然后尝试像这样使用它:
using System;
using System.IO;
using FluentNHibernate.Cfg;
using FluentNHibernate.Cfg.Db;
using NHibernate;
using NHibernate.Cfg;
using NHibernate.Tool.hbm2ddl;
using BugNS.Entities;
namespace BugNS
{
class Program
{
private const string DbFile = "bugs.db";
static void Main()
{
var sessionFactory = CreateSessionFactory();
using (var session = sessionFactory.OpenSession())
{
using (var transaction = session.BeginTransaction())
{
Bug b = new Bug { BugNumber = 121212 };
session.SaveOrUpdate(b);
transaction.Commit();
}
}
}
private static ISessionFactory CreateSessionFactory()
{
return Fluently.Configure()
.Database(SQLiteConfiguration.Standard
.UsingFile(DbFile))
.Mappings(m =>
m.FluentMappings.AddFromAssemblyOf<Program>())
.ExposeConfiguration(BuildSchema)
.BuildSessionFactory();
}
private static void BuildSchema(Configuration config)
{
// delete the existing db on each run
if (File.Exists(DbFile))
File.Delete(DbFile);
// this NHibernate tool takes a configuration (with mapping info in)
// and exports a database schema from it
new SchemaExport(config)
.Create(false, true);
}
}
}
我收到以下错误:
NHibernate.dll 中发生了“NHibernate.MappingException”类型的未处理异常
附加信息:没有持久性:BugNS.Entities.Bug
抱歉,我刚开始从文档中学习 Fluent 和 NHibernate。如果有人知道这个问题的解决方案,那就太好了,因为我已经花了很多时间徒劳无功。