public ActionResult Add(ResourcesAddViewModel viewModel)
        {
            ValidateResource(viewModel.Resource);

            if (ModelState.IsValid)
            {
                var resource = viewModel.Resource;

                _resourcesRepository.Add(resource);

                TempData["Message"] = "Your resource was successfully added.";

                return(RedirectToAction("Details", new { id = resource.Id }));
            }

            viewModel.Init(Repository, _sectionsRepository);

            return(View(viewModel));
        }