asp.net mvc 4 - Virtual List is not populating in EF6 -

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virtual list not populating second row of data. here model of userprofile

  [table("userprofile")]    public class usrprofile     {         [key]         public int userid { get; set; }         [required]         public string username { get; set; }         public int? introducerid { get; set; }         [foreignkey("introducerid")]         public virtual usrprofile introducer { get; set; }         public virtual list<userinrole> userinroles { get; set; }         public virtual list<usrprofile> members { get; set; }      }

and userinrole model

 [table("webpages_usersinroles")]     public class userinrole     {         [key]         public int roleid { get; set; }         [foreignkey("roleid")]         public virtual userrole userrole { get; set; }         public int userid { get; set; }         [foreignkey("userid")]         public virtual usrprofile user { get; set; }     }

here query user

  public jsonresult getuser(int id)             {                 var usr = urepository.usrprofiles.firstordefault(c => c.userid == id);                 var seconusrrole = usr.members[1].userinroles;                 //here seconusrrole null, called individually data.                 return json(, jsonrequestbehavior.allowget);             }

is bug of or doing somthing wrong?

you not loading related entities

// using system.data.entity.core.objects; var usr = urepository.usrprofiles.include(x => x.members.select(y => y.userinroles))                                  .firstordefault(c => c.userid == id);  var seconusrrole = usr.members[1].userinroles;

see microsoft post more information: https://msdn.microsoft.com/en-ca/data/jj574232.aspx

edit

you must add "system.data.entity.core.objects" namespace include expressions.

the include method extension methods on iqueryable<t>.


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