Use symbols for day_types

app/models/workout.rb

@@ -1,5 +1,13 @@
 class Workout < ActiveRecord::Base
-  DAY_TYPES = %w(heavy medium light)
+  DAY_TYPES = [:heavy, :medium, :light ]
   validates_date :date
   validates_inclusion_of :day_type, :in => Workout::DAY_TYPES
+
+  def day_type
+    read_attribute(:day_type).to_sym
+  end
+
+  def day_type=(value)
+    write_attribute(:day_type, value.to_s)
+  end
 end

app/views/workouts/_form.html.erb

@@ -13,8 +13,8 @@
   </div>
   <div>
     <%= f.label :day_type %>
-    <%= f.select :day_type, [["Heavy", 'heavy'], ["Medium", 'medium'],
-      ["Light", 'light']] %>
+    <%= f.select :day_type, [["Heavy", :heavy], ["Medium", :medium],
+      ["Light", :light]] %>
   </div>
   <div>
     <%= f.label :comment %>