载波上传器的未定义方法处理

Question

我有一个简单的模型，安装了一个载波上传器。RubyVersion2.2.3，Rails 4.2.4，Imagemagick安装在mac (10.11.1 El Capitan)上。安装了MiniMagick 4.3.6GEM；但是，我得到了用于上传器的错误未定义方法进程。

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创业板文件：

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

上传器安装在模型上：

mount_uploaders :avatars, AvatarUploader

该模型具有属性:avatars

avatar_uploader.rb：(为清晰起见，删除注释行)

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

有什么线索吗？

Answer 1

我建议你这么做

process :resize_to_fit => [400, 400]

而不是：

process :scale => [300, 300]

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