Foreign Keys referencing same table exception when upgrading from EF Core RC2 to V1 -

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hopefully simple 1 have upgraded release version of ef core , can no longer run code against db.

i have 2 tables, client table , language table. client has 2 references language table, 1 language , other language @ home. language has

public icollection<client> clients { get; set; }

and client has 

public language language { get; set; } private int? _languageid;  public int? languageid {         {         if (_languageid != 0)             return _languageid;         if (language != null)             return language.languageid;         return null;     }     set { _languageid = value; } }  public language languageathome { get; set; } private int? _languageathomeid;  public int? languageathomeid {         {         if (_languageathomeid != 0)             return _languageathomeid;         if (languageathome != null)             return languageathome.languageid;         return null;     }     set { _languageathomeid = value; } }

in onmodelcreating have following 2 lines

modelbuilder.entity<client>().hasone(m => m.languageathome).withmany(m => m.clients).hasforeignkey(p => p.languageathomeid).hasconstraintname("foreignkey_client_languageathome"); modelbuilder.entity<client>().hasone(m => m.language).withmany(m => m.clients).hasforeignkey(p => p.languageid).hasconstraintname("foreignkey_client_language");

i have looked @ upgrade documentation rc2 v1 , doesn't changes this. https://docs.efproject.net/en/latest/miscellaneous/rc2-rtm-upgrade.html

the exception is:

system.invalidoperationexception: cannot create relationship between 'language.clients' , 'client.language', because there relationship between 'language.clients' , 'client.languageathome'. navigation properties can participate in single relationship.

i tried reversing 

modelbuilder.entity<language>().hasmany(l => l.clients).withone(c => c.languageathome).hasforeignkey(k => k.languageathomeid).hasconstraintname("foreignkey_client_languageathome"); modelbuilder.entity<language>().hasmany(l => l.clients).withone(c => c.language).hasforeignkey(k => k.languageid).hasconstraintname("foreignkey_client_language");

but exact same error.

looking @ ef source on git hub traced error internal relationship builder line 2145 in changeset https://github.com/aspnet/entityframework/commit/5765564bc4dc55f9acb1716a1f5b40a8f8b0b399.

my hunch change has occurred between rc2 , v1.

my question is doing wrong or bug has been introduced?

update -- solved andriy

i changed language class have 2 collections of client so

public icollection<client> languageathomeclients { get; set; } public icollection<client> languageclients { get; set; }

and modified relationship in onmodelcreating to

modelbuilder.entity<client>().hasone(m => m.languageathome).withmany(m => m.languageathomeclients).hasforeignkey(p => p.languageathomeid).hasconstraintname("foreignkey_client_languageathome"); modelbuilder.entity<client>().hasone(m => m.language).withmany(m => m.languageclients).hasforeignkey(p => p.languageid).hasconstraintname("foreignkey_client_language");

i upgraded ef core v1 , works treat!

as exception states navigation property can part of 1 relationship. in rc2 ef silently replace first 1 second one, in rtm throws alert fact. should create property, clientsathome other relationship.


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