title: How to convert mysql2 to psql in cucumber rails
body: <p>I am trying to convert mysql2 to postgres. When i run rake db:create I am getting the following error.</p>
  
  <pre><code>rake aborted!
  Gem::LoadError: You have already activated rake 12.3.0, but your Gemfile requires rake 10.4.2. Prepending bundle exec to your command may solve this.
  /home/supranimbus12/.rvm/gems/ruby-2.2.3@global/gems/bundler-1.16.1/lib/bundler/runtime.rb:313:in check_for_activated_spec!' /home/supranimbus12/.rvm/gems/ruby-2.2.3@global/gems/bundler-1.16.1/lib/bundler/runtime.rb:31:inblock in setup'
  /home/supranimbus12/.rvm/gems/ruby-2.2.3@global/gems/bundler-1.16.1/lib/bundler/runtime.rb:26:in map' /home/supranimbus12/.rvm/gems/ruby-2.2.3@global/gems/bundler-1.16.1/lib/bundler/runtime.rb:26:insetup'
  /home/supranimbus12/.rvm/gems/ruby-2.2.3@global/gems/bundler-1.16.1/lib/bundler.rb:107:in setup' /home/supranimbus12/.rvm/gems/ruby-2.2.3@global/gems/bundler-1.16.1/lib/bundler/setup.rb:10:in&lt;top (required)&gt;'
  /home/supranimbus12/tracks-2.3.0/config/boot.rb:4:in &lt;top (required)&gt;' /home/supranimbus12/tracks-2.3.0/config/application.rb:1:in&lt;top (required)&gt;'
  /home/supranimbus12/tracks-2.3.0/Rakefile:4:in &lt;top (required)&gt;' /home/supranimbus12/.rvm/gems/ruby-2.2.3@global/gems/rake-12.3.0/exe/rake:27:in&lt;top (required)&gt;'
  (See full trace by running task with --trace)
  </code></pre>