02 Setup

Rails 4.2 setup

Rails 4.2 has introduced a bin/setup file designed to be the canonical place to add code related to getting a project setup. Let's look at it for a bit.

$ bin/setup

It may complain that schema.rb doesn't exist yet, and that you should run bin/rake db:migrate. If so, run that, and run bin/setup again.

$ bin/rake db:migrate
$ bin/setup

Setup test DB

Run RAILS_ENV=test bin/setup to also setup the test database.

$ RAILS_ENV=test bin/setup

Set Ruby version

Add the Ruby version to the Gemfile and check the Rails version.

ruby '2.1.4'
gem 'rails', '4.2.0.beta4'

And add a .ruby-version file to match.

echo '2.1.4' > .ruby-version

Re-navigate to the current directory to make sure your Ruby switcher (RVM/Rbenv/Chruby) picks it up.

cd .
ruby --version

Let's fire up the server in a new tab and check it out.

bin/rails s

Now check out http://localhost:3000 in a browser, and you should see a default Rails page.

Commit.

git add .
git commit -m "Specify Ruby version for this app"