gem 'aws-s3'

bundle install

development:
  bucket: bucket-dev
  access_key_id: xxx
  secret_access_key: xxx
test:
  bucket: bucket-test
  access_key_id: xxx
  secret_access_key: xxx
production:
  bucket: bucket-pro
  access_key_id: xxx
  secret_access_key: xxx

  #paperclip
  has_attached_file :photo,
       :styles => {
       :thumb=> "100x100#",
       :small  => "400x400>" },
     :storage => :s3,
     :s3_credentials => "#{RAILS_ROOT}/config/s3.yml",
     :path => "/:style/:id/:filename"

That’s it! Simple isn’t it.

links that might help

From this link, you can find the steps for creating a Rails project from scratch with paperclip.
http://jameswilding.net/2010/07/24/paperclip-rails-3/

As I have already had a project that needs file attachments, I follow a slightly different path.

The steps for adding a file attachment is as follows:

1. Install Paperclip

$ rails plugin install git://github.com/thoughtbot/paperclip.git

2. Add image attribute to your model

  #paperclip
  has_attached_file :photo,
     :styles => {
       :thumb=> "100x100#",
       :small  => "400x400>" }

3. Create migration file and add the necessary columns to your database

$ rails generate migration add_photo_to_microposts photo_file_name:string photo_content_type:string photo_file_size:integer

rake db:migrate

4. Change you form

<%= form_for @micropost  , :html => { :multipart => true } do |f| %>
  <%= f.file_field :photo %>
  ...

5. Change view that will show the uploaded image (optional)

<% if micropost.photo.exists? then %>
	<%= image_tag micropost.photo.url(:small) %>
<% end %>

That’s it. It is done.

1. Add config vars to your Heroku environment  http://blog.heroku.com/archives/2009/4/7/config-vars/

heroku config:add S3_BUCKET=production-bucket-name S3_KEY=8N029N81 S3_SECRET=9s83109d3+583493190

2. Add the same constants to your .profile file

export S3_BUCKET=development-bucket-name
export S3_KEY=888888888
export S3_SECRET=999999999

ps . Blog Post on Heroku about AWS S3 — http://blog.heroku.com/archives/2009/4/7/config-vars/

ps2. and yes this post is also about  heatmap.me which is my pet project for online heatmap generation.

So after messing up a couple of git branches, I finally get it work, yey!

Here are the steps:

• Watch the railscast about sending email
• Install the gem with TLS

sudo gem install ambethia-smtp-tls -v '1.1.2' --source http://gems.github.com

• Add the following to your environment.rb (Be careful after the Rails::Initializer.run do |config| block. )

#to the top of file
require 'smtp-tls'

...
#to the very end of the file
ActionMailer::Base.smtp_settings =
{
    :address => "smtp.gmail.com",
    :port => 587,
    :domain => "gmail.com",
    :user_name => "dkberktas",#not with @gmail.com
    :password => "xxxyyyzzz",
    :authentication => :plain,
    :enable_starttls_auto => true
}

• Run the mailer generator by

script/generate mailer user_mailer

• Go to UserMailer class and add the method

  def registration_confirmation()
    recipients  "xxx@gmail.com"
    from        "xxx@gmail.com"
    subject     "Thank you for being that awesome"
    body        "no I am just kidding" #if you want to pass parameter do it like this -- > ":user => user"
  end

• Add a sample method to application controller and add it to the routes.rb

#in application controller
  def mailDeneme
    UserMailer.deliver_registration_confirmation()
    render :text => "OK"
  end
#in routes.rb
map.mail  '/mail',  :controller => 'application', :action => 'mailDeneme'

If you see an error like this:

Net::SMTPAuthenticationError (530 5.7.0 Must issue a STARTTLS command first.

You miss the item above about  installing smtp-tls gem. Read it again again, or check this forum post.

ps. This is the official rails guide.
ps2. this is another link.

• Blog post which is a good summary of alternatives — (kind of a survey)
• A related question on StackOverflow
• Blog post about Delayed Job link
• Heroku suggests Delayed Job, so this is the one I am looking for
• and finally this is the Heroku guide for using Delayed Job
• Railcast about Delyaed_job
• Tip&Tricks

If you are interested, we are using Delayed Job for creating our heatmaps for remotespots usability testing site. Heatmap project will probably work as a separate project so that others can also use it for creating heatmaps on top of their images. Stay tuned for the heatmap side project!

Steps for Delayed_job

• Install the plugin from github (from collectiveideas) with

script/plugin install git://github.com/collectiveidea/delayed_job.git

• Create the model

script/generate delayed_job

rake db:migrate

• You can set priority and a certain time for the job to be put on queue.

send_later(:your_method_name, -3, 3.days.from_now)