public IActionResult Create(VehicleCreateModel model)
 {
     foreach (VehicleType vehicleType in model.VehicleTypes)
     {
         if (vehicleTypeRepository.Exists(vehicleType))
         {
             ModelState.AddModelError(string.Empty, "VehicleType already exists");
         }
         if (ModelState.IsValid)
         {
             vehicleType.Id = vehicleTypeRepository.Create(vehicleType);
         }
     }
     foreach (Vehicle vehicle in model.Vehicles)
     {
         if (vehicleRepository.Exists(vehicle))
         {
             ModelState.AddModelError(string.Empty, "Vehicle already exists");
         }
         if (ModelState.IsValid)
         {
             VehicleType previouslyStoredType = vehicleTypeRepository.GetByTitle(vehicle.VehicleType.Title);
             if (previouslyStoredType != null)
             {
                 vehicle.VehicleTypeId = previouslyStoredType.Id;
                 vehicleRepository.Create(vehicle);
             }
         }
     }
     if (ModelState.IsValid)
     {
         return(RedirectToAction("Index"));
     }
     ViewData["CompanyId"]     = new SelectList(companyRepository.GetAll(), "Id", "Title");
     ViewData["VehicleTypeId"] = new SelectList(companyRepository.GetAll(), "Id", "Title");
     return(View(model));
 }