title: Rails: Using helper across all controllers
body: <p>I need to access my <strong>section_grades.rb</strong> helper from anywhere in the application. </p>
  
  <p>Currently in one section of my app, the finances section, I have this code in <strong>finance_controller.rb</strong>: </p>
  
  <pre><code>    include SectionGrades
  
      ...
  
      if current_user
        rainy_day_checker
        retirement_grade
        credit_card_grade
        spending_grade
      end
  </code></pre>
  
  <p>Do I move this into <strong>application_controller.rb</strong>? If so, what's the method I put it under? I tried and it said current_user is not defined. </p>