Sinatra template generator
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Snfn - A Sinatra application generator

Snfn is an opinionated generator for Sinatra projects. It can be configured using the following options:

  • -d Database. Options are "postgres," "mysql," "sqlite", and "mongo." Default is "sqlite."
  • --redis Include Redis configuration options.
  • --no-database Don't include any database config options.
  • --no-heroku Don't include Heroku config options.


gem install snfn


Standard Heroku app, using sqlite for local development and PostgreSQL for production.

snfn my_app

App without Heroku options and mysql config.

snfn my_app -d mysql --no-heroku


The template autoloads files in config/initializers and /lib. Database configuration options are stored in config/db.yml and are loaded via config/initializers/database.rb.

Right now Snfn only comes out of the box with support for Unicorn, (the config file is stored at config/unicorn.rb), but changing it out for thin or mongrel is pretty trivial.

DB Setup

Sequel is used as an ORM for relational databases, and migrations are stored in db/migrate. Migrations can be run using the rake command rake rb:migrate.

MongoMapper is used for Mongo apps, with the config options stored in the same files as relational databases (config/db.yml and config/initializers/database.rb).

More information

If there is any interest in supporting other ORMs like DataMapper or ActiveRecord, either please let me know or implement it yourself and send a pull request.

Set up on Heroku

By default, Snfn creates an app with the proper options for deployment on Heroku. To get Snfn up and running on Heroku:

  1. Install your gems with bundle install
  2. Create a new git repository: git init .
  3. Make your first commit: git add .; git commit -m "initial commit"
  4. Create a new heroku app: bundle exec heroku create --stack cedar
  5. Deploy the app: git push heroku master

Heroku Add-Ons

To use PostgreSQL, MongoDB, or Redis on Heroku, you'll need to add the proper Heroku add-ons. The commands to do this are, respectively:

heroku addons:add shared-database # PostgreSQL
heroku addons:add mongolab:starter # MongoDB
heroku addons:add redistogo:nano # Redis

Contributing to snfn

  • 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.


Copyright (c) 2011 Zach Pendleton. See LICENSE.txt for further details.