public ActionResult Index(long themeId)
{
var theme = _dal.Get <Theme>(themeId);
var model =
new ThemeViewModel(
EnumHelpers.Enumerate <Opinion>()
.Select(
_ =>
new ThemeOpinionViewModel(_, theme.Comments.Where(c => c.Opinion == _).ToArray()))
.ToArray(),
theme);
return(View(model));
}