NaiyaShah-BTC

SIZES = [%w[small S], %w[medium M], %w[large L], %w[extra_large EL]]
SIZES.each do |size|
  upload_and_delete_local_file(key, image, size.first, size.last)
end

def upload_and_delete_local_file(key, image, size, file_size)
  obj = S3.bucket('unikaihatsu-s3').object(key.gsub 'original', size)
  obj.upload_file(Rails.public_path.join("#{file_size}_#{image.img_file_name}"), acl:'public-read')
  File.delete(Rails.public_path.join("#{file_size}_#{image.img_file_name}"))
end

NaiyaShah-BTC

SIZES_ARR = [[167, 200, 'S'], [325, 390, 'M'], [625, 750, 'L']]
SIZES_ARR.each do |size_data|
  resize_image(cropped_img, size_data.first, size_data.second, size_data.last)
end

def resize_image(image, width, height, size)
  image.resize_to_fill(width, height).write(Rails.public_path.join("#{size}_#{self.img_file_name}"))
end

NaiyaShah-BTC

has_attached_file :img,
                  styles: { small: '167x200#', medium: '325x390#', large: '625x750#' },
                  default_url: '/assets/images/missing_product.png',
                  s3_region: ENV['AWS_REGION'],
                  storage: :s3,
                  s3_protocol: :https,
                  s3_credentials: "#{Rails.root}/config/amazon_s3.yml",
                  url: ':s3_domain_url',
                  path: '/hyper-image/bumon-code/:style/:id/:filename',
                  s3_host_alias: 'https://s3-ap-northeast-1.amazonaws.com/'