public ActionResult EditTag(int id)
        {
            var tag = _tagRepository.GetById(id);

            if (tag == null)
            {
                return(RedirectToAction("Tags"));
            }

            var viewModel = tag.MapItem <TagCreateViewModel>();

            viewModel.Months       = MonthYearHelper.GetMonthList();
            viewModel.Years        = MonthYearHelper.GetYearList();
            viewModel.HasDataSheet = _dataSheetService.HasDataSheet(tag.Year, tag.Month);
            viewModel.Year         = tag.Year;
            viewModel.Month        = tag.Month;
            return(View(viewModel));
        }