tag set presenter

app/logical/post_sets/post.rb

@@ -43,6 +43,10 @@ module PostSets
       tag_array.size == 1
     end
     
+    def is_empty_tag?
+      tag_array.size == 0
+    end
+    
     def current_page
       [page.to_i, 1].max
     end

app/logical/related_tag_calculator.rb

@@ -1,6 +1,6 @@
 class RelatedTagCalculator
   def self.find_tags(tag, limit)
-    Post.tag_match(tag).limit(limit).select("posts.tag_string").order("posts.md5").map(&:tag_string)
+    Post.tag_match(tag).limit(limit).select("posts.tag_string").reorder("posts.md5").map(&:tag_string)
   end
   
   def self.calculate_from_sample_to_array(tags, category_constraint = nil)