diff --git a/lib/dm-tags/dm_tags.rb b/lib/dm-tags/dm_tags.rb
index 5eb8d06..9119b95 100644
--- a/lib/dm-tags/dm_tags.rb
+++ b/lib/dm-tags/dm_tags.rb
@@ -57,6 +57,8 @@ def #{singular}_list
 
             def #{singular}_list=(string)
               @#{singular}_list = string.to_s.split(',').map { |name| name.gsub(/[^\\w\\s_-]/i, '').strip }.uniq.sort
+              
+              update_#{association}
             end
 
             alias_method :#{singular}_collection=, :#{singular}_list=
diff --git a/lib/dm-tags/tagging.rb b/lib/dm-tags/tagging.rb
index 3d42182..f39ef8b 100644
--- a/lib/dm-tags/tagging.rb
+++ b/lib/dm-tags/tagging.rb
@@ -8,6 +8,10 @@ class Tagging
 
   belongs_to :tag
 
+  # Datamapper doesnt throw the next line in apparently,
+  # or theres an error before it gets added..whatever
+  property :tag_id, Integer
+
   def taggable
     taggable_type.get!(taggable_id)
   end