Override #to_s on Tag for simplified joining

app/helpers/todos_helper.rb

@@ -127,7 +127,7 @@ module TodosHelper
   end
 
   def tag_list_text(todo=@todo)
-    todo.tags.collect{|t| t.name}.join(', ')
+    todo.tags.join(', ')
   end
 
   def tag_span (tag, mobile=false)

app/models/tag.rb

@@ -30,4 +30,8 @@ class Tag < ActiveRecord::Base
     @label ||= name.gsub(' ', '-')
   end
 
+  def to_s
+    name
+  end
+
 end