Rails/Paperclip - 跳过图像处理 [英] Rails / Paperclip - skipping image processing

问题描述

如何跳过基于虚拟属性的后期处理?

How can I skip post processing based on a virtual attribute?

我的虚拟属性在 before_asset_post_process 回调中始终为零

My virtual attribute is always nil in the before_asset_post_process callback

创建

attachment = Attachment.create(asset: File.open(file.png), :skip_thumb => 1)

可连接模型

class Attachment < AR::Base
 attr_accessor :skip_thumb

  has_attached_file :asset, :styles => lambda  { |attachment| { :thumb =>  ["100>", 'jpg'] ,
                                                                       :thumb_big =>   ["200>", 'jpg']
                                                                     }
  before_asset_post_process :proceed_or_cancel

  def proceed_or_cancel
    #self.skip_thumb is always nil
    if (self.skip_thumb.present?)
      return false 
    end
  end 

end

推荐答案

:asset 的赋值将在 :skip_thumb 的赋值之前发生，如果它在哈希中是第一个你传递给 Attachment.create().因此，如果您将代码更改为:

The assignment of :asset will happen before the assignment of :skip_thumb if it's first in the hash that you pass to Attachment.create(). Therefore, it will work if you change your code to:

attachment = Attachment.create(skip_thumb: 1, asset: File.open(file.png))

我希望这不会太晚而有用...

I hope this is not too late to be useful...

这篇关于Rails/Paperclip - 跳过图像处理的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！