构建 SessionFactory 时出现 FluentNHibernate.MissingConstructorException

Question

我正在尝试使用 ODP.Net 流畅地配置 SessionFactory 以访问 Oracle9i 数据库，但我收到了 MissingConstructorException。我已经正确地整理了实际的流畅映射，但我不确定我还做错了什么。

这是例外：

BasicConnectionTests.AssertThatWeCanConnectToADatabase : 

FailedFluentNHibernate.MissingConstructorException: 'FluentNHibernate.Automapping.IAutoClasslike, FluentNHibernate, Version=1.1.0.685, Culture=neutral, PublicKeyToken=8aa435e3cb308880' is missing a parameterless constructor.
at FluentNHibernate.Utils.Extensions.InstantiateUsingParameterlessConstructor(Type type)
at FluentNHibernate.PersistenceModel.Add(Type type)
at FluentNHibernate.Utils.CollectionExtensions.Each<T>(IEnumerable`1 enumerable, Action`1 each)
at FluentNHibernate.PersistenceModel.AddMappingsFromSource(ITypeSource source)
at FluentNHibernate.Cfg.FluentMappingsContainer.Apply(Configuration cfg)
at FluentNHibernate.Cfg.MappingConfiguration.Apply(Configuration cfg)
at FluentNHibernate.Cfg.FluentConfiguration.BuildConfiguration() 
FluentNHibernate.Cfg.FluentConfigurationException: An invalid or incomplete configuration was used while creating a SessionFactory. Check PotentialReasons collection, and InnerException for more detail.


at FluentNHibernate.Cfg.FluentConfiguration.BuildConfiguration()
at FluentNHibernate.Cfg.FluentConfiguration.BuildSessionFactory() 
FluentNHibernate.Cfg.FluentConfigurationException: An invalid or incomplete configuration was used while creating a SessionFactory. Check PotentialReasons collection, and InnerException for more detail.


at FluentNHibernate.Cfg.FluentConfiguration.BuildSessionFactory()
at MyAwesomeApp.sessionFactories.Oracle9SessionFactoryWrapper.Configure(String userName, String passWord, String dataBase) in Oracle9SessionFactoryWrapper.cs: line 26
at MyAwesomeApp.Tests.oracle.BasicConnectionTests.AssertThatWeCanConnectToADatabase() in BasicConnectionTests.cs: line 17

这是流畅的映射：

public ISessionFactory Configure(string userName, string passWord, string dataBase)
        {
            var config = Fluently.Configure();

            config.Database(
                OracleDataClientConfiguration.Oracle9
                    .ConnectionString(cs => cs.Username(userName).Password(passWord).Instance(dataBase))
                    .Driver("NHibernate.Driver.OracleDataClientDriver")
#if DEBUG
                    .ShowSql()
#endif
                );

            config.Mappings(
                m => m.FluentMappings.AddFromAssembly(Assembly.GetCallingAssembly()));

            return config.BuildSessionFactory();
        }

如果有人能指出我哪里出错了，我将不胜感激。

Answer 1

正如 James Gregory 在对我的问题的评论中指出的那样，当我告诉 Fluent 我的映射是什么时，我做了一些非常愚蠢的事情。

当从单元测试的上下文中执行代码时，m => m.FluentMappings.AddFromAssembly(Assembly.GetCallingAssembly()) 试图告诉 Fluent 在单元测试程序集中查找映射 - 这将会失败，非常糟糕。

答案是使用m =>; m.FluentMappings.AddFromAssemblyOf()，其中 Foo 是映射所在程序集中的类型。