Rails 3.1 Migrate to PostgreSQL locally
group :development, :test do
  gem 'pg'
end
group :production do
  gem 'pg'
end

Couldn't create database for {"adapter"=>"sqlite3", "database"=>"db/test.sqlite3", "pool"=>5, "timeout"=>5000}
db/development.sqlite3 already exists
rake aborted!
Please install the sqlite3 adapter: `gem install activerecord-sqlite3-adapter` (sqlite3 is not part of the bundle. Add it to Gemfile.)

development:
    adapter: postgresql
    database: cookbook
    username: uid
    password: pwd
    host: localhost