C# 将外键映射为主键Fluent NHibernate
我有下表场景:C# 将外键映射为主键Fluent NHibernate,c#,fluent-nhibernate,composite-id,C#,Fluent Nhibernate,Composite Id,我有下表场景: User - Id (PK) - Username Advert - Id (PK) - Title AdvertPhoto - Advert (PK) (Also a FK for Advert table) - Image Bid - Advert (PK) (Also a FK for Advert table) - User (PK) (Also a FK for User ta
User
- Id (PK)
- Username
Advert
- Id (PK)
- Title
AdvertPhoto
- Advert (PK) (Also a FK for Advert table)
- Image
Bid
- Advert (PK) (Also a FK for Advert table)
- User (PK) (Also a FK for User table)
- Value
好的,我尝试用下面的代码映射这些实体:
public class AdvertMapping : BaseMapping<Advert> {
public AdvertMapping() : base("Advert") {
Id(model => model.Id).Not.Nullable().Unique().GeneratedBy.Identity();
Map(model => model.Title).Not.Nullable().Length(100).Insert().Update();
}
}
public class AdvertPhotoMapping : BaseMapping<Advert> {
public AdvertPhotoMapping() : base("AdvertPhoto") {
Id(model => model.Advert)
.Column("Id")
.GeneratedBy.Foreign("Advert");
Map(model => model.Description).Nullable();
Map(model => model.Photo).CustomSqlType("image").Not.Nullable();
References(model => model.Advert, "Advert").Not.Nullable().Not.LazyLoad();
}
}
public class BidMapping { //: BaseMapping<Bid> {
public BidMapping() : base("Bid") {
Id(model => model.Advert, "Advert").GeneratedBy.Foreign("Advert");
CompositeId()
.KeyReference(model => model.Advert, "Advert")
.KeyReference(model => model.User, "User");
Map(model => model.Value).Not.Nullable().Insert().Update();
References(model => model.Advert, "Advert").Not.Nullable().Not.LazyLoad();
}
}
public类映射:BaseMapping{
公共广告映射():基(“广告”){
Id(model=>model.Id).Not.Nullable().Unique().GeneratedBy.Identity();
Map(model=>model.Title).Not.Nullable().Length(100.Insert().Update();
}
}
公共类映射:BaseMapping{
公共AdertPhotoMapping():基(“AdertPhoto”){
Id(model=>model.Advert)
.栏(“Id”)
.由外国公司生成(“广告”);
Map(model=>model.Description).Nullable();
Map(model=>model.Photo).CustomSqlType(“image”).Not.Nullable();
引用(model=>model.Advert,“Advert”).Not.Nullable().Not.LazyLoad();
}
}
公共类BidMapping{//:BaseMapping{
public BidMapping():基本(“投标”){
Id(model=>model.Advert,“Advert”).GeneratedBy.Foreign(“Advert”);
复合ID()
.KeyReference(model=>model.Advert,“Advert”)
.KeyReference(model=>model.User,“User”);
映射(model=>model.Value).Not.Nullable().Insert().Update();
引用(model=>model.Advert,“Advert”).Not.Nullable().Not.LazyLoad();
}
}
好的,当Fluent NHibernate试图引用AdvertPhotoMapping
类中的广告列时,我遇到了一个异常,我不知道BidMapping
CompositeId是否正确映射
我得到的例外是:
{“无法为以下列确定类型:SYB.Engine.Entities.Advert,SYB.Engine,Version=1.0.0,Culture=neutral,PublicKeyToken=null:NHibernate.Mapping.Column(Advert)”}
我做错了什么?
谢谢大家!通常,我会这样映射一对一关系:
public class AdvertPhotoMapping : BaseMapping<Advert> {
public AdvertPhotoMapping() : base("AdvertPhoto") {
Id(model => model.Advert)
.Column("Id")
.GeneratedBy.Foreign("Advert");
Map(model => model.Description).Nullable();
Map(model => model.Photo).CustomSqlType("image").Not.Nullable();
HasOne(model => model.Advert).Constrained();
}
}
public class AdvertMapping : BaseMapping<Advert> {
public AdvertMapping() : base("Advert") {
Id(model => model.Id).Not.Nullable().Unique().GeneratedBy.Identity();
Map(model => model.Title).Not.Nullable().Length(100).Insert().Update();
HasOne(x => x.AdvertPhoto).Cascade.All();
}
}
CompositeId()
.KeyReference(model => model.Advert, "Advert")
.KeyReference(model => model.User, "User");
Map(model => model.Value).Not.Nullable().Insert().Update();