entity framework - creating strict 1 to 1 relationship by code first -


i want create 1 1 relationship code first, below code,

class person {     public int id { get; set; }     public string name { get; set; }     public virtual persondetail detail { get; set; } }  class persondetail {     public int id { get; set; }     public double height { get; set; }     public double weight { get; set; }     public virtual person person { get; set; } }  class eftest : dbcontext {     public dbset<person> personset { get; set; }     public dbset<persondetail> detailset { get; set; }      protected override void onmodelcreating(dbmodelbuilder modelbuilder)     {         modelbuilder.entity<person>().hasrequired(x => x.detail).withrequiredprincipal(x => x.person);     } }

but still can insert person without person detail. i'm trying create 1 1 relationship in model first, works well, if insert 1 end without other end, there exception thrown. why code first code above create 1 0..1 relationship?

anyone can help?

that possible if both person , persondetail mapped same table (the mapping technique called table splitting) because strict 1:1 means cannot insert person without existing persondetail cannot insert persondetail without existing person => cannot insert either of them because dependency missing (remember each record has own insert command , database check integrity after each command not after transaction).

only when use table splitting ef create single insert command containing data both entities. in entity model 2 entities 1:1 mapping in database single table.


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