Interactive console for sinatra + activerecord

Rakefile

require 'my-sinatra-app'
require 'sinatra/activerecord/rake'

desc "run irb console"
task :console, :environment do |t, args|
  ENV['RACK_ENV'] = args[:environment] || 'development'

  exec "irb -r irb/completion -r my-sinatra-app"
end

You can also try http://rubygems.org/gems/tux