PreReqs:

• install image magick brew install imagemagick <- in the terminal
• gem install paperclip
• gem install aws-sdk
• think if you want 2 buckets: 1 for development and 1 for production

1. rails new paperclip demo
2. add gems to the Gemfile gem 'paperclip' gem 'aws-sdk'
3. create a new bucket on Amazon
4. In ENV/Production.rb & ENV/Development.rb

• add keys
• `:s3_host_name => 's3-us-west-1.amazonaws.com'' (specify host name for Northern California)

5. bundle install

6. rails g scaffold users name

7. rake db:migrate

8. In user model add "avatar" as attr_accessible has_attached_file :avatar, styles: { thumb: '100x100>' square: '200x200#' medium: '300x300>' }

9. rails g migration AddAvatarToUsers

10. to new migration file add_attachment :users, :avatar

11. views/user/form add <%= f.label :avatar %> <%= f.file_field :avatar %>

12. In views/show add <%= image_tag @user.avatar.url(:square) %>