如何根据用户性别和资产风格设置 Paperclip :default_url? [英] How to set Paperclip :default_url according User gender and asset style?

问题描述

通过这个要点脚本，我可以获得用户性别.但我也想得到 :style .有人知道怎么做吗?

Through this gist script I can get default url for paperclip with user gender. But I want to get :style too. Someone know how to?

推荐答案

这样做的默认方式:

#Assuming you default images are stored in app/assets/images/somedirectory

has_attached_file :attachment, default_url: :some_function

def some_function
   "somedirectory/:style/:class/#{self.gender}.png"
end

或使用 lambda:

or using lambda:

has_attached_file :attachment, default_url: lambda{|attachment| "somedirectory/:style/:class/#{attachment.instance.gender}.png" }

在 Rails 4 中测试.

Tested in Rails 4.

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