Question

我是Fluent NHibernate的新手，但是被Automapping和平台的其他功能集所吸引。我在获取ObservableCollection设置时遇到了麻烦，我在网上搜索并尝试了许多不同的东西，所有这些都让我回到了同样的错误：

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

 ---> FluentNHibernate.Cfg.FluentConfigurationException: An invalid or incomplete configuration was used while creating a SessionFactory. Check PotentialReasons collection, and InnerException for more detail.

 ---> System.ArgumentException: Cannot create an instance of FluentNHibernate.Automapping.AutoMapping`1[uNhAddIns.WPF.Collections.Types.ObservableListType`1[T]] because Type.ContainsGenericParameters is true.
   at System.RuntimeType.CreateInstanceCheckThis()
   at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
   at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
   at FluentNHibernate.Automapping.AutoMapper.ApplyOverrides(Type classType, IList`1 mappedMembers, ClassMappingBase mapping) in d:\Builds\FluentNH-v1.x-nh3\src\FluentNHibernate\Automapping\AutoMapper.cs:line 28
   at FluentNHibernate.Automapping.AutoMapper.MergeMap(Type classType, ClassMappingBase mapping, IList`1 mappedMembers) in d:\Builds\FluentNH-v1.x-nh3\src\FluentNHibernate\Automapping\AutoMapper.cs:line 41
   at FluentNHibernate.Automapping.AutoMapper.Map(Type classType, List`1 types) in d:\Builds\FluentNH-v1.x-nh3\src\FluentNHibernate\Automapping\AutoMapper.cs:line 176
   at FluentNHibernate.Automapping.AutoPersistenceModel.AddMapping(Type type) in d:\Builds\FluentNH-v1.x-nh3\src\FluentNHibernate\Automapping\AutoPersistenceModel.cs:line 185
   at FluentNHibernate.Automapping.AutoPersistenceModel.CompileMappings() in d:\Builds\FluentNH-v1.x-nh3\src\FluentNHibernate\Automapping\AutoPersistenceModel.cs:line 149
   at FluentNHibernate.Automapping.AutoPersistenceModel.Configure(Configuration configuration) in d:\Builds\FluentNH-v1.x-nh3\src\FluentNHibernate\Automapping\AutoPersistenceModel.cs:line 175
   at FluentNHibernate.Cfg.AutoMappingsContainer.Apply(Configuration cfg) in d:\Builds\FluentNH-v1.x-nh3\src\FluentNHibernate\Cfg\AutoMappingsContainer.cs:line 84
   at FluentNHibernate.Cfg.MappingConfiguration.Apply(Configuration cfg) in d:\Builds\FluentNH-v1.x-nh3\src\FluentNHibernate\Cfg\MappingConfiguration.cs:line 66
   at FluentNHibernate.Cfg.FluentConfiguration.BuildConfiguration() in d:\Builds\FluentNH-v1.x-nh3\src\FluentNHibernate\Cfg\FluentConfiguration.cs:line 128
   --- End of inner exception stack trace ---
   at FluentNHibernate.Cfg.FluentConfiguration.BuildConfiguration() in d:\Builds\FluentNH-v1.x-nh3\src\FluentNHibernate\Cfg\FluentConfiguration.cs:line 139
   at FluentNHibernate.Cfg.FluentConfiguration.BuildSessionFactory() in d:\Builds\FluentNH-v1.x-nh3\src\FluentNHibernate\Cfg\FluentConfiguration.cs:line 108
   --- End of inner exception stack trace ---
   at FluentNHibernate.Cfg.FluentConfiguration.BuildSessionFactory() in d:\Builds\FluentNH-v1.x-nh3\src\FluentNHibernate\Cfg\FluentConfiguration.cs:line 113
   at ToDoIt2.Model.Document.<Initialize>b__0() in C:\data\svn\WPF\vs2010\ToDoIt2\Application\Model\Document.cs:line 54
   at ToDoIt2.App.DisplayException(NoArgsDelegate z) in C:\data\svn\WPF\vs2010\ToDoIt2\Application\App.xaml.cs:line 66

这是适用的行：

---> System.ArgumentException: Cannot create an instance of 
FluentNHibernate.Automapping.AutoMapping`1[uNhAddIns.WPF.Collections.Types.ObservableListType`1[T]]
because Type.ContainsGenericParameters is true.

以下是我要映射的课程：

public class Item {
    public virtual int ItemID { get; set; }
    public virtual string Title { get; set; }
    public virtual ObservableListType<string> Children { get; set; }
}

使用uNhAddIns中的uNhAddIns.WPF.Collections.Types.ObservableListType。

这是我的AutoMapping：

this.FluentConfig = Fluently.Configure()
                    .Mappings(m => m.AutoMappings
                        .Add(AutoMap
                            .Assemblies(new ToDoIt2.DB.AutoMapping(), 
                                Assembly.GetExecutingAssembly(),
                                Assembly.GetAssembly(typeof(ObservableListType<>))
                            )
                            .IgnoreBase<pklib.DataObject>()
                            .Conventions.Add<myPrimaryKeyConvention>()
                            .Conventions.Add<myForeignKeyConvention>()
                        ));

从@Diego回答

域实体需要更改为：

public class Item {
    public virtual int ItemID { get; set; }
    public virtual string Title { get; set; }
    public virtual ICollection<string> Children { get; set; }
}

Fluent配置更改为：

this.FluentConfig = Fluently.Configure()
        .ExposeConfiguration(cfg => cfg.SetProperty(NHibernate.Cfg.Environment.CollectionTypeFactoryClass,
             typeof(WpfCollectionTypeFactory).AssemblyQualifiedName))
        .Mappings(m => m.AutoMappings
            .Add(AutoMap
                .Assemblies(new ToDoIt2.DB.AutoMapping(), 
                    Assembly.GetExecutingAssembly(),
                    Assembly.GetAssembly(typeof(ObservableListType<>))
                )
                .IgnoreBase<pklib.DataObject>()
                .Conventions.Add<myPrimaryKeyConvention>()
                .Conventions.Add<myForeignKeyConvention>()
            ));

Answer 1

您不应该在类和映射中直接使用ObservableListType（使用ICollection<T>，IList<T>等）

相反，您需要使用WpfCollectionTypeFactory作为集合类型工厂。

在XML配置中，可以通过设置collectiontype.factory_class="uNhAddIns.WPF.Collections.WpfCollectionTypeFactory, uNhAddIns.WPF"。

来完成

我不知道Fluent是否有任何快捷方式，但您可以使用以下内容：

.ExposeConfiguration(cfg => SetProperty(Environment.CollectionTypeFactoryClass,
                         typeof(WpfCollectionTypeFactory).AssemblyQualifiedName))

流畅的NHibernate + AutoMap + Observable

1 个答案: