conditional convert options paperclip

Question

After some research I was able to add styles based on my image_class column.

Model.rb

has_attached_file :image,
                    


        

Answer 1

You can also specify convert_options in styles:

class Image < ActiveRecord::Base
  has_attached_file :image, styles: -> (attachment) { attachment.instance.paperclip_styles }

  private

  def image_ratio
    # logic to define the image ratio
  end

  def paperclip_styles
    vitrina_geometry = image_ratio > 1.2 ? '268x156>' : '268x156^'
    vitrina_convert_options = if image_ratio > 1.2
      "-quality 75 -gravity center -crop '268x156+0+0'"
    else
      "-quality 75 -strip -gravity center -background '#FFFFFF' -extent 268x156"
    end

    {
      medium: { 
        geometry: '500x500>',
        convert_options: '-quality 75 -strip'
      },
      thumb: {
        geometry: '256x148>',
        convert_options: '-quality 75 -strip'
      },
      small: {
        geometry: '120x120>',
        convert_options: '-quality 75 -strip'
      },
      course_thumb: {
        geometry: '395x220^',
        convert_options: '-quality 75 -gravity center -crop \'395x220+0+0\''
      },
      :vitrina => {
        geometry: vitrina_geometry,
        convert_options: vitrina_convert_options
      }
    }
  end
end