polypaperclip¶ ↑

An adaptation of paperclip that uses a central attachments table so that you can attach many files to a given model without adding large amounts of database columns

class Page < ActiveRecord::Base
  has_attachment :primary_image, 
    :styles => {:large => "300x300", :thumb => "100x100"}
  has_attachment :secondary_image, 
    :styles => {:large => "200x200", :thumb => "50x50"}
end

Installing¶ ↑

Polypaperclip works with Rails 3 only.

Add polypaperclip to your Gemfile.

gem 'polypaperclip'

Generate the migration that creates the attachments table for you. The migration adds an index for optimized querying.

rails g polypaperclip:migration

Create config/paperclip.yml to override default paperclip options for different environments Credit: jspies www.jonathanspies.com/posts/6-Using-yaml-to-configure-default-options-for-Paperclip

development: storage: s3 bucket: bucket-name s3_credentials: “./config/s3.yml” path: “public:url”

test: storage: s3 bucket: bucket-name s3_credentials: “./config/s3.yml” path: “public:url”

production: storage: s3 bucket: bucket-name s3_credentials: “./config/s3.yml” path: “public:url”

Performance Note¶ ↑

If you’re going to be referencing these attachments in massive queries, don’t forget:

Page.include(:primary_image_attachment, :secondary_image_attachment)

This will eliminate n+1 query situations which can adversely impact performance.

TODO¶ ↑

has_many_attachments
validations?

Special Thanks¶ ↑

Thanks to Coyne Design (www.coyne-design.com/) for granting MIT license to this gem.

Contributing to polypaperclip¶ ↑

Check out the latest master to make sure the feature hasn’t been implemented or the bug hasn’t been fixed yet
Check out the issue tracker to make sure someone already hasn’t requested it and/or contributed it
Fork the project
Start a feature/bugfix branch
Commit and push until you are happy with your contribution
Make sure to add tests for it. This is important so I don’t break it in a future version unintentionally.
Please try not to mess with the Rakefile, version, or history. If you want to have your own version, or is otherwise necessary, that is fine, but please isolate to its own commit so I can cherry-pick around it.

polypaperclip

Development