lib/vestal_versions.rb in laserlemon-vestal_versions-0.7.1 vs lib/vestal_versions.rb in laserlemon-vestal_versions-0.8.0

@@ -5,11 +5,18 @@
     def self.included(base)
       base.extend ClassMethods
     end
 
     module ClassMethods
-      def versioned
+      def versioned(options = {})
+        class_inheritable_accessor :versioned_columns
+        self.versioned_columns = case
+          when options[:only] then column_names & Array(options[:only]).map(&:to_s)
+          when options[:except] then column_names - Array(options[:except]).map(&:to_s)
+          else column_names
+        end
+
         has_many :versions, :as => :versioned, :order => 'versions.number ASC', :dependent => :delete_all do
           def between(from, to)
             from_number, to_number = number_at(from), number_at(to)
             return [] if from_number.nil? || to_number.nil?
             condition = (from_number == to_number) ? to_number : Range.new(*[from_number, to_number].sort)
@@ -51,11 +58,11 @@
         def needs_initial_version?
           versions.empty?
         end
 
         def needs_version?
-          !changed.empty?
+          !(versioned_columns & changed).empty?
         end
 
         def reset_version(new_version = nil)
           @last_version = nil if new_version.nil?
           @version = new_version
@@ -64,10 +71,10 @@
         def create_initial_version
           versions.create(:changes => nil, :number => 1)
         end
 
         def create_version
-          versions.create(:changes => changes, :number => (last_version + 1))
+          versions.create(:changes => changes.slice(*versioned_columns), :number => (last_version + 1))
           reset_version
         end
 
       public
         def version