Rails3 和回形针 [英] Rails3 and Paperclip

问题描述

我已将我的应用程序从 rails 2.3 迁移到 rails3，但我遇到了回形针问题.我看到在回形针 git 上有一个 rails3 的分支.

I have migrated my application from rails 2.3 to rails3 and i have a problem with paperclip. I saw there was a branch for rails3 on paperclip git.

所以我在 Gemfile 中添加了gem 'paperclip', :git => 'git://github.com/thoughtbot/paperclip.git', :branch => 'rails3'"并启动命令包安装.

So I added "gem 'paperclip', :git => 'git://github.com/thoughtbot/paperclip.git', :branch => 'rails3'" into the Gemfile and launch the command bundle install.

安装回形针后，上传工作正常，但样式不行.我看到了一个黑客来修复它.

Once paperclip installed, the upload worked fine but not the styles. I saw a hack to fix it.

# in lib/paperclip/attachment.rb at line 293
def callback which #:nodoc:
  # replace this line...
  # instance.run_callbacks(which, @queued_for_write){|result,obj| result == false }
  # with this:
  instance.run_callbacks(which, @queued_for_write)
end

此后样式正常，但我无法激活处理器.我的代码是:

The styles are ok after that, but i'm not able to active the processor. My code is :

has_attached_file                 :image,
                                  :default_url => "/images/nopicture.jpg",
                                  :styles => { :large   => "800x600>",
                                               :cropped => Proc.new { |instance| "#{instance.width}x#{instance.height}>" },
                                                :crop    => "300x300>" },
                                   :processors => [:cropper]

我的处理器位于 RAILS_APP/lib/paperclip_processors/cropper.rb 并包含:

My processor is located in RAILS_APP/lib/paperclip_processors/cropper.rb and contains :

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

   def crop_command
      target = @attachment.instance
      trans = "";
      trans << " -crop #{target.crop_w}x#{target.crop_h}+#{target.crop_x}+#{target.crop_y}" if target.cropping?
      trans << " -resize \"#{target.width}x#{target.height}\""
      trans
   end

   def skip_crop?
     ["800x600>", "300x300>"].include?(@target_geometry.to_s)
   end
 end
end

我的问题是我收到此错误消息:未初始化的常量 Paperclip::Cropper未加载裁剪的处理器.

My problem is that i got this error message : uninitialized constant Paperclip::Cropper The cropped processor is not loaded.

有人想解决这个问题吗?

Is anybody has an idea to fix that ?

有关信息，我的应用程序在 rails 2.3.4 上运行良好.

For information my application works fine on rails 2.3.4.

推荐答案

我有同样的问题.似乎回形针处理器没有加载到 rails 3 中.在有人修复它之前，我解决了在/config/initializers 中移动cropper.rb 文件的问题

I have the same problem. Seems like paperclip processors are not loaded in rails 3. Until someone fix it, I hacked the problem moving the cropper.rb file inside /config/initializers

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