Nhibernate 无法扩展未映射的类:实体
我有一个名为Entity的基类:Nhibernate 无法扩展未映射的类:实体,nhibernate,nhibernate-mapping,Nhibernate,Nhibernate Mapping,我有一个名为Entity的基类: public class Entity { public int Id {get;set;} } 假设我有一个名为Customer的类: public class Customer : Entity { public string Name {get;set;} } 现在,使用NHibernate 3.3.1中基于约定的代码映射,我尝试以下操作: public static class DataHelper { private sta
public class Entity
{
public int Id {get;set;}
}
假设我有一个名为Customer的类:
public class Customer : Entity
{
public string Name {get;set;}
}
现在,使用NHibernate 3.3.1中基于约定的代码映射,我尝试以下操作:
public static class DataHelper
{
private static HbmMapping GetMappings()
{
var mapper = new CustomModelMapper(typeof(Entity));
return mapper.CompileMappingFor(
typeof(DataHelper).Assembly.GetExportedTypes()
.Where(x => x.IsSubclassOf(typeof(Entity))));
}
}
当我尝试运行我的应用程序时,出现错误“无法扩展未映射的类:实体”。我不想映射实体类——它只是继承一些公共属性的基类。如何让NHibernate忽略未映射的类?下面列出了我的CustomModelMapper类以供参考
下面列出了CustomModelMapper类的代码以供参考
internal class CustomModelMapper : ConventionModelMapper
{
private const int DEFAULT_STRING_LENGTH = 100;
private Type baseType;
public CustomModelMapper(Type baseType)
{
this.baseType = baseType;
}
public CustomModelMapper()
{
SetupInspectors();
}
protected override void AppendDefaultEvents()
{
base.AppendDefaultEvents();
BeforeMapClass += OnBeforeMapClass;
BeforeMapProperty += OnBeforeMapProperty;
BeforeMapManyToOne += OnBeforeMapManyToOne;
BeforeMapBag += OnBeforeMapBag;
BeforeMapList += OnBeforeMapList;
BeforeMapSet += OnBeforeMapSet;
}
protected void OnBeforeMapClass(IModelInspector modelInspector, Type type, IClassAttributesMapper classCustomizer)
{
classCustomizer.Id(type.GetProperty("Id"), m => m.Generator(Generators.Native));
}
protected void OnBeforeMapProperty(IModelInspector modelInspector, PropertyPath member, IPropertyMapper propertyCustomizer)
{
if (member.LocalMember.GetPropertyOrFieldType().IsEnum)
{
var type = member.LocalMember.GetPropertyOrFieldType();
var genericType = typeof(EnumStringType<>).MakeGenericType(type);
propertyCustomizer.Type(genericType, null);
}
if (member.LocalMember.GetPropertyOrFieldType() == typeof(string))
propertyCustomizer.Length(DEFAULT_STRING_LENGTH);
}
protected void OnBeforeMapManyToOne(IModelInspector modelInspector, PropertyPath member, IManyToOneMapper propertyCustomizer)
{
propertyCustomizer.Cascade(Cascade.All);
propertyCustomizer.Fetch(FetchKind.Join);
propertyCustomizer.Lazy(LazyRelation.NoLazy);
propertyCustomizer.Index(string.Format("IX{0}{1}",
member.GetContainerEntity(modelInspector).Name,
member.LocalMember.Name));
}
protected void OnBeforeMapBag(IModelInspector modelInspector, PropertyPath member, IBagPropertiesMapper propertyCustomizer)
{
propertyCustomizer.Cascade(Cascade.All);
propertyCustomizer.Lazy(CollectionLazy.Extra);
propertyCustomizer.Fetch(CollectionFetchMode.Subselect);
}
protected void OnBeforeMapList(IModelInspector modelInspector, PropertyPath member, IListPropertiesMapper propertyCustomizer)
{
propertyCustomizer.Cascade(Cascade.All);
propertyCustomizer.Lazy(CollectionLazy.Extra);
propertyCustomizer.Fetch(CollectionFetchMode.Subselect);
}
protected void OnBeforeMapSet(IModelInspector modelInspector, PropertyPath member, ISetPropertiesMapper propertyCustomizer)
{
propertyCustomizer.Cascade(Cascade.All);
propertyCustomizer.Lazy(CollectionLazy.Extra);
propertyCustomizer.Fetch(CollectionFetchMode.Subselect);
}
protected void SetupInspectors()
{
IsRootEntity((type, declared) =>
{
return baseType.Equals(type.BaseType);
});
IsEntity((type, declared) =>
{
return baseType.IsAssignableFrom(type) && !type.IsInterface;
});
IsVersion((member, declared) =>
{
return
member.Name == "Version" &&
member.MemberType == MemberTypes.Property &&
member.GetPropertyOrFieldType() == typeof(int);
});
IsBag((member, declared) =>
{
if (member.GetPropertyOrFieldType().IsGenericType)
return IsGenericType(member, typeof(ICollection<>));
return false;
});
IsList((member, declared) =>
{
if (member.GetPropertyOrFieldType().IsGenericType)
return IsGenericType(member, typeof(IList<>));
return false;
});
IsSet((member, declared) =>
{
if (member.GetPropertyOrFieldType().IsGenericType)
return IsGenericType(member, typeof(ICG.ISet<>));
return false;
});
}
protected static bool IsGenericType(MemberInfo member, Type targetType)
{
var type = member.GetPropertyOrFieldType();
var generics = type.GetGenericInterfaceTypeDefinitions();
return generics.Contains(targetType);
}
}
内部类CustomModelMapper:ConventionModelMapper
{
private const int DEFAULT_STRING_LENGTH=100;
私有类型baseType;
公共CustomModelMapper(类型baseType)
{
this.baseType=baseType;
}
公共CustomModelMapper()
{
设置检查员();
}
受保护的覆盖无效AppendDefaultEvents()
{
base.AppendDefaultEvents();
BeforeMapClass+=OnBeforeMapClass;
BeforeMapProperty+=OnBeforeMapProperty;
BeforeMapManyTone+=OnBeforeMapManyTone;
beforemappag+=onbeforemappag;
BeforeMapList+=OnBeforeMapList;
BeforeMapSet+=OnBeforeMapSet;
}
BeforeMapClass上受保护的void(IModeInspector modelInspector,类型类型,IClassAttributesMapper classCustomizer)
{
Id(type.GetProperty(“Id”),m=>m.Generator(Generators.Native));
}
BeforeMapproperty上受保护的void(IModeInspector modelInspector、PropertyPath成员、IPropertyMapper propertyCustomizer)
{
if(member.LocalMember.GetPropertyOrFieldType().IsEnum)
{
var type=member.LocalMember.GetPropertyOrFieldType();
var genericType=typeof(EnumStringType)。MakeGenericType(type);
propertyCustomizer.Type(genericType,null);
}
if(member.LocalMember.GetPropertyOrFieldType()==typeof(string))
propertyCustomizer.Length(默认字符串长度);
}
BeforeMapManyToOne上的受保护无效(IModeInspector modelInspector、PropertyPath成员、IManyToOneMapper propertyCustomizer)
{
propertyCustomizer.Cascade(Cascade.All);
propertyCustomizer.Fetch(FetchKind.Join);
propertyCustomizer.Lazy(LazyRelation.NoLazy);
propertyCustomizer.Index(string.Format(“IX{0}{1}”),
member.GetContainerEntity(modelInspector).Name,
member.LocalMember.Name));
}
BeforeMapBag上的受保护无效(IModeInspector modelInspector、PropertyPath成员、IBagPropertiesMapper propertyCustomizer)
{
propertyCustomizer.Cascade(Cascade.All);
propertyCustomizer.Lazy(CollectionLazy.Extra);
propertyCustomizer.Fetch(CollectionFetchMode.Subselect);
}
BeforeMapList上受保护的void(IModeInspector modelInspector、PropertyPath成员、IListProperties映射器propertyCustomizer)
{
propertyCustomizer.Cascade(Cascade.All);
propertyCustomizer.Lazy(CollectionLazy.Extra);
propertyCustomizer.Fetch(CollectionFetchMode.Subselect);
}
BeforeMapset(IModeInspector modelInspector、PropertyPath成员、ISetPropertiesMapper propertyCustomizer)上受保护的void
{
propertyCustomizer.Cascade(Cascade.All);
propertyCustomizer.Lazy(CollectionLazy.Extra);
propertyCustomizer.Fetch(CollectionFetchMode.Subselect);
}
受保护的无效设置检查器()
{
IsRootEntity((类型,声明)=>
{
返回baseType.Equals(type.baseType);
});
IsEntity((类型,声明)=>
{
返回baseType.IsAssignableFrom(type)&&!type.IsInterface;
});
IsVersion((成员,声明)=>
{
返回
member.Name==“版本”&&
member.MemberType==MemberTypes.Property&&
member.GetPropertyOrFieldType()==typeof(int);
});
IsBag((成员,声明)=>
{
if(member.GetPropertyOrFieldType().IsGenericType)
返回IsGenericType(成员,typeof(ICollection));
返回false;
});
IsList((成员,已声明)=>
{
if(member.GetPropertyOrFieldType().IsGenericType)
返回IsGenericType(成员,typeof(IList));
返回false;
});
IsSet((成员,声明)=>
{
if(member.GetPropertyOrFieldType().IsGenericType)
返回IsGenericType(成员,typeof(ICG.ISet));
返回false;
});
}
受保护的静态bool IsGenericType(MemberInfo成员,类型targetType)
{
var type=member.GetPropertyOrFieldType();
var generics=type.GetGenericInterfaceTypeDefinitions();
返回泛型.Contains(targetType);
}
}
问题可能出在您的实体上。当前,对于实体
类本身,它将返回true。只需再加一张支票:
IsEntity((type, declared) =>
{
return baseType.IsAssignableFrom(type) && !type.IsInterface &&
type != typeof(Entity); // <- skip Entity class
});
IsEntity((类型,声明)=>
{
返回baseType.IsAssignableFrom(type)&&!type.IsInterface&&
type!=typeof(Entity);//不,我试过了,但仍然得到了相同的结果。对于通过GetExportedTypes()调用收集的实体,似乎抛出了错误,这些实体没有通过mapper.Class()显式声明
调用。这些调用在映射文档中显示为JoinedSubclass。如果我添加一个空的映射语句,例如mapper.Class(map=>{})
对于每个类,错误都会消失,并且每个类在映射文档中都列为根类。因此,我想问题是,如何确保NHibernate将所有实体类都视为根类?