Rails 3升级后重新装订时出现回形针错误 [英] paperclip error while reporcessing after rails 3 upgrade

问题描述

我有回形针正在上载并保存不同样式的图像，但是当我使用Railscasts教程中的jcrop裁剪图像时，它不会裁剪图像.我收到此错误

I have paperclip working uploading and saving different styles for images but when i go to crop the image using jcrop from railscasts tutorial it doesnt crop image. I get this error

[paperclip] identify -format %wx%h '/var/folders/z+/z+KzOZBFE9irCpbMKKBGFk+++TI/-Tmp-/paperclip-reprocess20110118-19757-1wtrjaj-0[0]' 2>/dev/null
[paperclip] convert '/var/folders/z+/z+KzOZBFE9irCpbMKKBGFk+++TI/-Tmp-/paperclip-reprocess20110118-19757-1wtrjaj-0[0]' -crop 28x32+13+15-resize "400x400>" '/var/folders/z+/z+KzOZBFE9irCpbMKKBGFk+++TI/-Tmp-/paperclip-reprocess20110118-19757-1wtrjaj-020110118-19757-1a5n558-0.jpg' 2>/dev/null
[paperclip] An error was received while processing: #<Paperclip::PaperclipError: There was an error processing the thumbnail for paperclip-reprocess20110118-19757-1wtrjaj-0>

这是在Rails 2.3.9中工作的，但是hvae刚升级到Rails 3.0.3，我拥有所有最新的宝石等.

This was working in rails 2.3.9 but hvae just upgraded to rails 3.0.3 I have got all latest gems etc.

cropper.rb文件如下，位于初始化程序目录中

The cropper.rb file is as follows and is in the initializers dir

module Paperclip
  class Cropper < Thumbnail
    def transformation_command
      if crop_command
        crop_command + super.join(" ").sub(/ -crop \S+/, '')
      else
        super
      end
    end

    def crop_command
      target = @attachment.instance   

      if target.cropping?
        " -crop #{target.crop_w.to_i}x#{target.crop_h.to_i}+#{target.crop_x.to_i}+#{target.crop_y.to_i}"
      end
    end
  end
end

尺寸已进入此范围，但实际上并未裁剪图像.

The sizes are getting into this but no actually cropping the image.

请问有人可以帮忙吗?

非常感谢 理查德·莫斯(Richard Moss)

thanks alot Richard Moss

推荐答案

以下是我的工作文件:

module Paperclip
  class Cropper < Thumbnail
    def transformation_command
      if crop_command
        crop_command + super.join(' ').sub(/ -crop \S+/, '').split(' ') # super returns     an array like this: ["-resize", "100x", "-crop", "100x100+0+0", "+repage"]
      else
        super
      end
    end

    def crop_command
      target = @attachment.instance
      if target.cropping?
        ["-crop", "#{target.crop_w}x#{target.crop_h}+#{target.crop_x}+#{target.crop_y}"]
      end
    end
  end
end

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