Rails%203%20In%20Action

Application setup
This command installs not only the rspec-rails, cucumber, and capybara gems but
also their dependencies (and so on)! How great is that? You’re just getting started.
The bundle install --binstubs command also creates a Gemfile.lockfile that contains
a list of the gems and their relative versions. Once Gemfile.lock is created,
whenever you run bundle install, Bundler reads this file rather than Gemfile to work
out the dependencies of the application and installs from it. You commit this file to
your repository so that when other people work on your project and run bundle
install, they get exactly the same versions that you have.
Next, you want to generate the skeleton for Cucumber. A generator can generate
either static or dynamic content, depending on the generator. For the Cucumber skeleton
generator, it’s set content. To run this generator, you use the rails command
rails generate cucumber:install
or simply
rails g cucumber:install
Rails doesn’t mind if you use generate or g: it’s all the same to Rails.
Let’s not mind too much about all the files it has generated at the moment; they’re
explained in time. With the Cucumber skeleton now generated, you have a base on
which to begin writing your features.
While you’re generating things, you may as well run the RSpec generator too:
rails generate rspec:install
With this generated code in place, you should make a commit so you have another
base to roll back to if anything goes wrong:
git add .
git commit -m "Ran the cucumber and rspec generators"
git push
3.1.4 Database configuration
By default, Rails uses a database system called SQLite3, which stores each environment’s
database in separate files inside the db directory. SQLite3 is the default database
system because it’s the easiest to set up. Out of the box, Rails also supports the
MySQL and PostgreSQL databases, with gems available that can provide functionality
for connecting to other database systems such as Oracle.
If you want to change which database your application connects to, you can open
config/database.yml (development configuration shown in the following listing) and
alter the settings to the new database system.
Listing 3.6 config/database.yml
development:
adapter: sqlite3
database: db/development.sqlite3
pool: 5
timeout: 5000
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