This is no longer maintained!!

This gem will force paperclip to store attachments on S3 if your application is
in production. It’s great for Heroku apps.

If you’re in fact using Heroku, and you want the
attachments to have custom paths. PLEASE do not use RAILS_ROOT. Why? Every
time you deploy your app to Heroku, you’re changing the
RAILS_ROOT, so all your uploaded files will be lost and your bucket WILL be a mess!

A default, Heroku-working path is default.

Add the gem to your Gemfile with

gem “paperclip-s3”

bundle install

Then, you’ll need to setup some ENV variables. You will need to provide a secret
key, an access key and a bucket.

You can provide an s3_credentials hash options with access_key_id and
secret_access_key instead.

If you are using Heroku, you can use the

config:add

  heroku config:add S3_BUCKET=your_bucket_name
  heroku config:add S3_KEY=your_access_key
  heroku config:add S3_SECRET=your_secret_key

If you are using https as the S3 Protocol, you can also specify it as a Heroku environment variable.

  heroku config:add S3_PROTOCOL=https

Notice that the S3 protocol will default to http

You can optionally specify which environments will use S3 with the

S3_ENVIRONMENTS

  ENV['S3_ENVIRONMENTS'] = 'staging,production' # defaults to production only

After you’ve done this, you can use paperclip normally. The gem just extends
the methods and changes the options to force the S3 Storage. You can even use
the same options (like path, default_style, etc.)

  class User < ActiveRecord::Base
    has_attached_file :avatar, default_url: "/images/defaults/photo-missing.jpg"
  end

Feel free to fork, fix/patch/extend this. Everything is welcome.