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Setup Heroku

To setup ror_ecommerce to work on Heroku follow these steps:

Create a Heroku account

Go to Heroku and create an account.

Change compass for production

Gemfile changes

Add the following to the Gemfile:

gem 'aws-sdk'

group :production do
  gem  'pg'
end

Move the mysql2 gem to development/test or change development database config user to postgres:

group :test, :development do
  gem 'mysql2', '~> 0.3.10'
end

Remove the autotest-fsevent from the Gemfile. Heroku doesn't like is as it's for Mac.

if RUBY_PLATFORM =~ /darwin/
  # gem "autotest-fsevent", '~> 0.2.5'
end 

Images

In order to use Paperclip on Heroku you need to have an Amazon S3 account. There is excellent documentation on how to setup S3 on Heroku's DevCenter.

Once that is setup you will need to comment out the following in config/environments/production.rb

PAPERCLIP_STORAGE_OPTS = {  :styles => {:mini => '48x48>',
                                      :small => '100x100>',
                                      :medium => '200x200>',
                                      :product => '320x320>',
                                      :large => '600x600>' },
                          :default_style => :product,
                          :url => "/assets/products/:id/:style/:basename.:extension",
                          :path => ":rails_root/public/assets/products/:id/:style/:basename.:extension"     }

You will need to create a bucket on Amazon S3. There are several tools to do this. I suggest taking a look at the Firefox plugins for this. Cyberduck is a good free Mac app that supports Amazon S3 as well as Rackspace Cloud Files. You also need to create a config/s3.yml config file as instructed by the aws-s3 gem.

Edit your app/models/image.rb from has_attached_file :photo, PAPERCLIP_STORAGE_OPTS to:

has_attached_file :photo, {
  :styles => {  :mini => '48x48>',
                :small => '100x100>',
                :product => '320x320>',
                :large => '600x600>' },
  :default_style => :product,
  :storage => :s3,
  :s3_credentials => {:access_key_id     => ENV['AWS_ACCESS_KEY_ID'],
                      :secret_access_key => ENV['AWS_SECRET_ACCESS_KEY']},
  :path => ":attachment/:style/:id-:basename.:extension",
  :bucket => 'youbucketname'
} ##  this constant is in /config/environments/*.rb

Add the asset_sync gem to your Gemfile and generate the config file:

rails g asset_sync:install --provider=AWS

This will generate an asset_sync config file for Amazon S3/Cloudfront at config/initializers/asset_sync.rb

It should look like the following:

AssetSync.configure do |config|
  config.fog_provider = 'AWS'
  config.fog_directory = ENV['FOG_DIRECTORY']
  config.aws_access_key_id = ENV['AWS_ACCESS_KEY_ID']
  config.aws_secret_access_key = ENV['AWS_SECRET_ACCESS_KEY']

  # Don't delete files from the store
  # config.existing_remote_files = "keep"
  #
  # Increase upload performance by configuring your region
  # config.fog_region = 'eu-west-1'
  #
  # Automatically replace files with their equivalent gzip compressed version
  # config.gzip_compression = true
  #
  # Use the Rails generated 'manifest.yml' file to produce the list of files to 
  # upload instead of searching the assets directory.
  # config.manifest = true
  #
  # Fail silently.  Useful for environments such as Heroku
  # config.fail_silently = true
end

Create a new Heroku instance. The stack command is important as the default stack doesn't support Rails 3 properly

heroku create --stack cedar

This will create the Heroku instance and add it's git URL to your git repo. Commit the changes and push it up to your Heroku instance.

git add . && git commit . -m 'heroku commit'
git push 
git push heroku master

Setup AWS S3

For this step, you will need your Amazon AWS API credentials. You can find them on this page.

Once you have these credentials you can now add then to Heroku:

You need to add your AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY & FOG_DIRECTORY details like this: Replace the following examples with your API key and Amazon S3 bucket (FOG_DIRECTORY):

 heroku config:add AWS_ACCESS_KEY_ID=xxxxxxxxxxxx
 heroku config:add AWS_SECRET_ACCESS_KEY=xxxxxxxxxxxx
 heroku config:add FOG_DIRECTORY=youbucketname

To view what variables are already set on your Heroku instance, run heroku config.

Once these details have been set, you can then run the Rails asset compilation and push the assets up to your Amazon AWS bucket by using this command:

 heroku run rake assets:precompile --trace

Add the following to config/aws.rb

 require 'aws'
 # log requests using the default rails logger
 AWS.config(:logger => Rails.logger)
 # load credentials from a file
 if File.exists?(File.dirname(__FILE__)+"/../aws.yml")
    config_path = File.expand_path(File.dirname(__FILE__)+"/../aws.yml")
 else
    config_path = nil
 end
 if config_path
   AWS.config(YAML.load(File.read(config_path)))
 else
    AWS::S3::Base.establish_connection!(
      :access_key_id     => ENV['AWS_ACCESS_KEY_ID'],
      :secret_access_key => ENV['AWS_SECRET_ACCESS_KEY'] 
    )
 end

Lastly be sure to edit order_item.rb order_items_in_cart because Postgres doesn't like MySQL syntax. This is because Heroku uses Postgres and not MySQL.

 def self.order_items_in_cart(order_id)
   find(:all, :joins => {:variant => :product },
           :conditions => { :order_items => { :order_id => order_id}},
           :select => "order_items.id, order_items.order_id, order_items.shipping_rate_id, order_items.state, order_items.tax_rate_id, order_items.price, order_items.total, order_items.variant_id,
                       products.shipping_category_id,
                                      count(*) as quantity,
                                      products.shipping_category_id as shipping_category_id,
                                      SUM(order_items.price) as sum_price,
                                      SUM(order_items.total) as sum_total",
           :group => "order_items.id,
                      products.shipping_category_id,
                      order_items.order_id,
                      order_items.shipping_rate_id,
                      order_items.state,
                      order_items.tax_rate_id,
                      order_items.price,
                      order_items.total, order_items.variant_id")
 end 

Look at Heroku's documentation

I find Heroku's documentation to be excellent. The navigation is average though. Luckily google is great and I search heroku's docs by doing google searches.

You can push your development database to your Heroku instance by running the command heroku db:push. Before you can run this command you need to have the taps gem added to your Gemfile. You can read more about this command here.

If all else fails

If you are experiencing problems or need help, create an issue and we would be happy to help :)

Even if it is an Heroku issue I'd love to document the information in this readme for other people to see.

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