public async Task <IActionResult> CreateBike([FromForm] BikeMultiPartDTO model)
        {
            using (var transaction = _context.Database.BeginTransaction())
            {
                try
                {
                    if (model != null)
                    {
                        StoreImages storeImage = new StoreImages();
                        storeImage.Description = $"Bike '{model.Bike.Brand} - {model.Bike.Model}'  image files";
                        _storeImgRepo.Add(storeImage);
                        await _storeImgRepo.SaveChangesAsync();

                        if (model.Files.Any())
                        {
                            // save bike images
                            foreach (var file in model.Files)
                            {
                                if (file.Length > 0)
                                {
                                    using (var ms = new MemoryStream())
                                    {
                                        file.CopyTo(ms);
                                        var fileBytes = ms.ToArray();
                                        _imgContentRepo.Add(new ImgContent
                                        {
                                            ImgContentMimeType = file.ContentType,
                                            StoreImgId         = storeImage.StoreImgId,
                                            ImgCreateDt        = DateTime.UtcNow,
                                            ImgContentName     = file.FileName,
                                            Content            = fileBytes,
                                            IsThumbnail        = file.FileName.Equals(model.Bike.ThumbFileName)
                                        });
                                        await _imgContentRepo.SaveChangesAsync();
                                    }
                                }
                            }
                        }


                        Bike bike = _mapper.Map <BikeForCreation, Bike> (model.Bike);
                        bike.ImgId = storeImage.StoreImgId;
                        //create new bike
                        _bikeRepository.CreateBike(bike);
                        await _bikeRepository.SaveChangesAsync();

                        // add junction with colors
                        _bikesColorsRepo.AddRange(model.Bike.Colors.Select(colorId => new BikesColors()
                        {
                            BikeId = bike.BikeId, ColorId = colorId
                        }).ToList());
                        await _bikesColorsRepo.SaveChangesAsync();

                        // add junction with sizes
                        _bikesSizesRepo.AddRange(model.Bike.Sizes.Select(sizeId => new BikesSizes()
                        {
                            BikeId = bike.BikeId, SizeId = sizeId
                        }).ToList());
                        await _bikesSizesRepo.SaveChangesAsync();

                        transaction.Commit();
                        return(Ok());
                    }

                    return(BadRequest());
                }
                catch (Exception ex)
                {
                    transaction.Rollback();
                    return(StatusCode(500, $"Internal server error: {ex.Message}"));
                }
            }
        }
        public IActionResult Create()
        {
            var bike = _bikeRepo.CreateBike();

            return(View(bike));
        }