Bullet

We don't like N+1 queries. Nobody does. If you don't know what we are talking about, please read this article that explains it pretty well.

In order to identify possible N+1 queries, we use the gem bullet.

Please add the gem to both development and test group of the Gemfile since we'll use it also in our tests.

Those are our favourite configurations:

• in development we enable it and we see the issues both a footer in the page and also in the logs

# config/environments/development.rb

config.after_initialize do
  Bullet.enable = true
  Bullet.bullet_logger = true
  Bullet.add_footer = true
end

• in test we enable it and raise an exception in case a N+1 is identified (or an unused eager loading)

# config/environments/test.rb

config.after_initialize do
  Bullet.enable = true
  Bullet.bullet_logger = true
  Bullet.raise = true
end