Rails image_tag 旋转图像

我使用亚马逊的 S3 进行图像存储，并配置了载波和雾。图像似乎存储正确，但是当我有“肖像”图像（宽度小于高度）时，它无法正确显示，而是将图像旋转到其一侧。

任何正确方向的指示将不胜感激！

上传者/image_uploader.rb

class ImageUploader < CarrierWave::Uploader::Base
  include CarrierWave::RMagick

  include Sprockets::Helpers::RailsHelper
  include Sprockets::Helpers::IsolatedHelper

  storage :fog

  include CarrierWave::MimeTypes
  process :set_content_type

  process :resize_to_limit => [420, 0]

  def store_dir
    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  end

  def extension_white_list
    %w(jpg jpeg png)
  end

end

显示.html.haml

= image_tag(@idea.image_attachments.first.image.url).to_s

图片附件.rb

class ImageAttachment < ActiveRecord::Base
  require 'carrierwave/orm/activerecord'
  attr_accessible :image, :description
  belongs_to :image_attachable, polymorphic: true
  mount_uploader :image, ImageUploader
end

在 uploader.rb 文件中，尝试

process :auto_orient 

def auto_orient
 manipulate! do |image|
   image.tap(&:auto_orient)
 end
end

它应该修复它。