This commit fixes a bug seen when using the tagged_with("something") …

…method.

I have an ActiveRecord class defined like such:

	class Athlete < ActiveRecord::Base
		set_table_name "warehouse.ps_person"
		acts_as_taggable_on :tags
	end

Athlete.tagged_with("something") creates sql like this:

	SELECT `warehouse`.`ps_person`.* FROM `warehouse`.`ps_person`
	JOIN taggings warehouse.ps_person_taggings_something_932  ON warehouse.ps_person_taggings_something_932.taggable_id = warehouse.ps_person.emplid AND warehouse.ps_person_taggings_something_932.taggable_type = 'Athlete' AND warehouse.ps_person_taggings_something_932.tag_id = 2

This fix simply uses the undecorated_table_name instead of the table_name to define the basename of the alias

lib/acts_as_taggable_on/acts_as_taggable_on/core.rb

@@ -91,7 +91,7 @@ def tagged_with(tags, options = {})
             safe_tag = tag.name.gsub(/[^a-zA-Z0-9]/, '')
             prefix   = "#{safe_tag}_#{rand(1024)}"
 
-            taggings_alias = "#{table_name}_taggings_#{prefix}"
+            taggings_alias = "#{undecorated_table_name}_taggings_#{prefix}"
 
             tagging_join  = "JOIN #{ActsAsTaggableOn::Tagging.table_name} #{taggings_alias}" +
                             "  ON #{taggings_alias}.taggable_id = #{table_name}.#{primary_key}" +
@@ -103,7 +103,7 @@ def tagged_with(tags, options = {})
           end
         end
 
-        taggings_alias, tags_alias = "#{table_name}_taggings_group", "#{table_name}_tags_group"
+        taggings_alias, tags_alias = "#{undecorated_table_name}_taggings_group", "#{undecorated_table_name}_tags_group"
 
         if options.delete(:match_all)
           joins << "LEFT OUTER JOIN #{ActsAsTaggableOn::Tagging.table_name} #{taggings_alias}" +