ruby-on-rails – 如何从服务器目录中制作Paperclip流程文件？

在后一种情况下,有一个答案.

首先,你需要一些模型来保存图像和其他一些数据,如下所示：

class Picture < ActiveRecord::Base
    has_attached_file :image,:styles => {
        :thumb => "100x100>",:big => "500x500>"
      }
end

您可以在lib / tasks文件夹中创建简单的rake任务(您应该使用.rake扩展名命名该文件)

namespace :import do

  desc "import all images from SOURCE_DIR folder"
  task :images => :environment do
    # get all images from given folder
    Dir.glob(File.join(ENV["SOURCE_DIR"],"*")) do |file_path|
      # create new model for every picture found and save it to db
      open(file_path) do |f|
        pict = Picture.new(:name => File.basename(file_path),:image => f)
        # a side affect of saving is that paperclip transformation will
        # happen
        pict.save!
      end


      # Move processed image somewhere else or just remove it. It is
      # necessary as there is a risk of "double import"
      #FileUtils.mv(file_path,"....")
      #FileUtils.rm(file_path)
    end
  end

end

然后你可以从控制台手动调用rake任务,提供SOURCE_DIR参数,该参数将是服务器上的文件夹(它可以是真正的文件夹或安装的远程)

rake import:images SOURCE_DIR=~/my_images/to/be/imported

如果您打算自动运行,我建议您使用Resque Scheduler gem.

更新：为了简单起见,我故意省略了异常处理