Carrierwave的条件版本/过程 [英] Conditional versions/process with Carrierwave

问题描述

我有这个上载器类

class ImageUploader < CarrierWave::Uploader::Base

  include CarrierWave::RMagick

  process :resize_to_limit => [300, 300]

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

 ...

它将原始文件处理为300x300并保存一个拇指版本。

Which will process the original file to 300x300 and save a thumb version.

我希望能够仅基于模型上的布尔值来制作小型/缩略图版本？

I would like to be able to make a small/thumb version only based on a boolean on my model?

所以我这样做了

if :icon_only?
 process :resize_to_limit => [50, 50]
else
  process :resize_to_limit => [300, 300]
end

protected

 def icon_only? picture
   model.icon_only?
 end

但是它总是以50x50的处理速度结束。即使我这样做了

But it always ended up in 50x50 processing. Even when I did like this

 def icon_only? picture
   false
 end

我的语法可能会完全错误：但是我也尝试过

I might got my syntax up all wrong with the : but i also tried asking

if icon_only?

告诉我没有这样的方法名称。我迷路了...

Which told me there was no method name like that.Im lost...

推荐答案

使用：if 有条件，例如：

process :resize_to_limit => [50, 50], :if => :icon_only?
process :resize_to_limit => [300, 300], :if => ...

我实际上并没有尝试过，但已记录在在代码中，因此应该可以使用。

I haven't actually tried this but it's documented in the code, so it should work.

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