title: Trouble starting rails application
body: <p>I am very new to ruby on rails and I'm having this problem with creating a new controller for my "plans" resource:</p>
  
  <pre><code>rails generate controller plans
  /Users/RentaroSatomi/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/bundler-1.8.0/lib/bundler/runtime.rb:34:in 
  'block in setup': You have already activated spring 1.3.3, 
  but your Gemfile requires spring 1.3.1. 
  Prepending 'bundle exec' to your command may solve this. (Gem::LoadError)
  </code></pre>
  
  <p>The error says something about having a wrong spring version, but I really don't know how to fix this.</p>
  
  <p>*EDIT: Solved: <a href="https://stackoverflow.com/questions/28975233/gemloaderror-when-running-rails-console">This post solved my problem</a></p>