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

note: haven't verified that on working code

It seems that the argument to the block passed in :convert_options is already an instance, not the attachment (as opposed to styles option, where it is an attachment)

Try:

convert_options: lambda { |instance| instance.decide_convert_options }

Btw your code would look much better if you extract the configuration data, for example:

has_attached_file :image,
  styles: lambda { |attachment| attachment.instance.image_options[:styles] }, 
  convert_options: lambda { |instance| instance.image_options[:convert_options] }


IMAGE_OPTIONS = {
  poster: {
    styles: {
      thumb: ["30x45!", :jpg],
      standard: ["185x278!", :jpg],
      expanded: ["372x559!", :jpg]
      big: ["600x900!", :jpg]
    },
    convert_options: {
      thumb: "-flop",
      standard: "-flop",
      expanded: "-flop",
      big: = "-flop"
    }
  },
  cover: {
    styles: {
      thumb: ["30x45!", :jpg],
      standard: ["300x1200!", :jpg]
    },
    convert_options: {
      thumb: "-enhance",
      standard: "-enhance"
    }
  }
}

def image_options
  IMAGE_OPTIONS[self.image_class]
end

I hope that helps

Update:

it looks like your convert_options are not being set here: https://github.com/thoughtbot/paperclip/blob/a93dfc773b4fd649db4d1281b42a2a71b1ae72ff/lib/paperclip/style.rb#L55

it seems they recommend passing convert_options with styles, like in this spec: https://github.com/thoughtbot/paperclip/blob/263a498195d47563a6227be18cf4463c4c6e7903/spec/paperclip/style_spec.rb#L41

can you try this? so remove convert_options entirely, and in your configuration return hash like:

IMAGE_OPTIONS = {
      poster: {
        styles: {
          thumb: {
            geometry: "30x45!",
            format: :jpg,
            convert_options: '-flop',
          },
          standard: {...}
          expanded: {...}
          big: {...}
        }
      },
      cover: {
        styles: {...}