Paperclip - Conditional cropping by image ratio

Question

I'm using paperclip with ImageMagik. My question is, how can I make paperclip crop images to a certain size only if their ratio is smaller then X.

What i'm looking for is to crop all images to a certain dimesion, except for tall images, which I don't want to crop, simply scale.

My current setup is: "X425"

I would like to have: "615X425#" for non tall images, and "X425" for tall\wide images.

Thanks! Uri

Answer 1

Conditional Formatting

A while back, we wanted to use conditional styling in Paperclip, and came up with this & have since found this:

#app/models/attachment.rb
Class Attachment < ActiveRecord::Base

    has_attached_file :image,
        styles: Proc.new { |instance| instance.resize }

    private

    def resize     
        geo = Paperclip::Geometry.from_file(photo.to_file(:original))

        ratio = geo.width/geo.height  

        min_width  = 142
        min_height = 119

        if ratio > 1
           # Horizontal Image
           final_height = min_height
           final_width  = final_height * ratio
           "#{final_width.round}x#{final_height.round}!"
        else
           # Vertical Image
           final_width  = min_width
           final_height = final_width * ratio
          "#{final_height.round}x#{final_width.round}!"
        end
  end  
end

I took the resize code from this answer