Reprocess only missing images with Paperclip

When a paperclip attachment gains a new style and you have many attachments, reprocessing can take ages. This is because all styles are being recomputed.

To create only missing images, patch Paperclip like this in your script that does the reprocessing:

Paperclip <2.3.2

class Paperclip::Attachment
  private

  def post_process_styles_with_extreme_lazyness
    @old_styles = @styles

    @styles = @styles.reject do |name, _|
      exists?(name)
    end

    post_process_styles_without_extreme_lazyness

  ensure
    @styles = @old_styles
  end

  alias_method_chain :post_process_styles, :extreme_lazyness
end

Paperclip >= 2.3.2 (untested):

class Paperclip::Attachment
  private

  def post_process_styles_with_extreme_lazyness
    styles
    @old_styles = @normalized_styles

    @normalized_styles = @normalized_styles.reject do |name, _|
      exists?(name)
    end

    post_process_styles_without_extreme_lazyness

  ensure
    @normalized_styles = @old_styles
  end

  alias_method_chain :post_process_styles, :extreme_lazyness
end

Tobias Kraze

makandra.de

Say thanks2

Last edit

Over 13 years ago

Keywords

faster, fast, slow

License

Source code in this card is licensed under the MIT License.

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Posted by Tobias Kraze to makandra dev (2010-08-25 14:03)

Reprocess only missing images with Paperclip

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