1. Dec 4th, 2009

    Vanity 1.1.0: Metrics and Ruby 1.8.6/7 support

    This release introduces metrics.  Metrics are the gateway drug to better software.

    A metric definition is a Ruby file that looks like this:

    metric "Signup" do
  description "Measures how many people signed up for our awesome service."
end

    Once you have your metric, feed it data by calling the track! method. For example:

    class AccountsController < ApplicationController

  def create
    @person = Person.new(params[:person])
    if @person.save
      track! :signup      # track successful sign up
      UserSession.create person
      redirect_to root_url
    else
      render :action=>:new
    end
  end

end

    Define, track, that’s about all you need to know.

    Metric data can also come from database queries, log files, Google Analytics, etc. To use external sources you have to write your own metric implementation.

    Read more about metrics.

    You want to start using metrics from your A/B tests, for example:

    ab_test "Pricing options" do
  metrics :signup
  alternatives 15, 25, 29
end

    You’ll see why this is a good idea soon enough.

    Much thanks to Ian Sefferman for finding bugs and helping fix Ruby 1.8.7 and Rails support.

    Keep measuring and experimenting,
    Assaf

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