Sort array in view

I am trying to sort an array in the view by using link_to's, however I'm not getting any changes in the results.

The view -

 = link_to 'Rating', sort: "rating"
 = link_to 'Origin', sort: "origin"
 = link_to 'Meal Time', sort: "meal_time"

The controller -

 def index
   @recipes = Recipe.order(params[:sort])
 end

Am I missing something? I was using this ASCIIcast as it's the most simple solution I've found to this problem.