当我尝试添加Venue对象并调用SaveChanges()时，我不明白为什么会出现此错误。模型中与Venue对象的唯一区别是它们与City是1对1..0关系。Citycity=ProcessCityCache(ev,country,db);//Afterthiscall,'city'isalreadypersisted.venue=newVenue{TicketMasterURL=ev.VenueSeoLink,Name=Capitalize(ev.VenueName),City=city};db.Venues.AddObject(venue);db.SaveChanges();//E

写入数据库时​​出现此错误:AdependentpropertyinaReferentialConstraintismappedtoastore-generatedcolumn.Column:'PaymentId'.publicboolPayForItem(intterminalId,doublepaymentAmount,eNums.MasterCategoryEnummastercategoryEnum,intCategoryId,intCategoryItemId){using(vardbEntities=newDatabaseAccess.Schema.EntityModel(

写入数据库时​​出现此错误:AdependentpropertyinaReferentialConstraintismappedtoastore-generatedcolumn.Column:'PaymentId'.publicboolPayForItem(intterminalId,doublepaymentAmount,eNums.MasterCategoryEnummastercategoryEnum,intCategoryId,intCategoryItemId){using(vardbEntities=newDatabaseAccess.Schema.EntityModel(