diff --git a/lib/orbit_tag/taggable.rb b/lib/orbit_tag/taggable.rb
index 35fe20c..cc45fea 100644
--- a/lib/orbit_tag/taggable.rb
+++ b/lib/orbit_tag/taggable.rb
@@ -10,29 +10,22 @@ module OrbitTag
     module ClassMethods
       def with_tags(tags=[])
         tags = [tags].flatten.uniq
-        result = []
         if tags.blank?
           self.all
         else
-          self.all.each do |taggable|
-            result << taggable if (taggable.taggings.map{|t| t.tag.id.to_s } & tags).size > 0
-          end
-          self.where(:id.in=>result.map{|taggable| taggable.id})
+          taggings = Tagging.where(:tag_id.in=>tags).map{|item| item.taggable_id}
+          self.where(:id.in=>taggings)
         end
       end
 
       def filter_by_tags(tags=[])
         tags = OrbitHelper.page_tags if tags.blank?
         tags = [tags].flatten.uniq
-        result = []
-
         if tags.blank? or (tags.include?("all") rescue false)
           self.all
         else
-          self.all.each do |taggable|
-            result << taggable if (taggable.taggings.map{|t| t.tag.id.to_s } & tags).size > 0
-          end
-          self.where(:id.in=>result.map{|taggable| taggable.id})
+          taggings = Tagging.where(:tag_id.in=>tags).map{|item| item.taggable_id}
+          self.where(:id.in=>taggings)
         end
       end