Merge pull request collectiveidea#56 from garaio/make_ignored_attribu…

…tes_configurable

ActsAsAudited.ignored_attributes accessor to set ignored attributes

lib/acts_as_audited.rb

@@ -26,6 +26,14 @@
 module ActsAsAudited
   VERSION = '2.0.0'
 
+  class << self
+    attr_accessor_with_default :ignored_attributes, ['lock_version',
+                                                     'created_at',
+                                                     'updated_at',
+                                                     'created_on',
+                                                     'updated_on']
+  end
+
   mattr_accessor :current_user_method
   # The method to be called to return the current user for logging in the audits.
   @@current_user_method = :current_user

lib/acts_as_audited/auditor.rb

@@ -59,8 +59,7 @@ def acts_as_audited(options = {})
         if options[:only]
           except = self.column_names - options[:only].flatten.map(&:to_s)
         else
-          except = [self.primary_key, inheritance_column, 'lock_version',
-            'created_at', 'updated_at', 'created_on', 'updated_on']
+          except = [self.primary_key, inheritance_column] + ActsAsAudited.ignored_attributes
           except |= Array(options[:except]).collect(&:to_s) if options[:except]
         end
         self.non_audited_columns = except

spec/acts_as_audited_spec.rb

@@ -17,6 +17,15 @@
       end
     end
 
+    it "should be configurable which attributes are not audited" do
+      ActsAsAudited.ignored_attributes = ['delta', 'top_secret', 'created_at']
+      class Secret < ActiveRecord::Base
+        acts_as_audited
+      end
+
+      Secret.non_audited_columns.should include('delta', 'top_secret', 'created_at')
+    end
+
     it "should not save non-audited columns" do
       create_user.audits.first.audited_changes.keys.any? { |col| ['created_at', 'updated_at', 'password'].include?( col ) }.should be_false
     end