ruby-on-rails - 载波 uploader 的未定义方法过程

Question

我有一个安装 Carrierwave uploader 的简单模型。 Ruby 版本 2.2.3、Ruby on Rails 4.2.4、Imagemagick 安装在 mac (10.11.1 El Capitan) 上。 MiniMagick 4.3.6 gem 已安装；但是，我收到错误undefined method process for uploader。

gem 文件:

gem "fog-google"
gem 'carrierwave', github: 'carrierwaveuploader/carrierwave'
gem "mini_magick"

uploader 安装在模型上:

mount_uploaders :avatars, AvatarUploader

模型具有属性:avatars

avatar_uploader.rb :(为清楚起见，删除了注释行)

class AvatarUploader < CarrierWave::Uploader::Base

  include CarrierWave::MiniMagick

  storage :file

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

  process :scale => [300, 300]

  def scale(width, height)
    process :resize_to_fit => [400, 400]
  end

  version :thumb do
    process :resize_to_fit => [50, 50]
  end

  def extension_white_list
    %w(jpg jpeg gif png)
  end

end

关于这可能是什么的任何线索？

Answer 1

我建议做

process :resize_to_fit => [400, 400]

代替:

process :scale => [300, 300]

def scale(width, height)
  process :resize_to_fit => [400, 400]
end