add versions helper;

ants.gemspec

@@ -24,12 +24,12 @@ Collection of concerns and helpers for Rails + Mongoid + Character web developme
   s.add_dependency('mongoid-slug', '>= 4.0.0')
 
   s.add_development_dependency('rails',       [ '>= 4.1'   ])
-  s.add_development_dependency('rake',        [ '>= 0.8.7' ])
   s.add_development_dependency('rspec',       [ '>= 2.0'   ])
   s.add_development_dependency('rspec-aspic', [ '>= 0.0.2' ])
   s.add_development_dependency 'bundler'
   s.add_development_dependency 'coveralls'
 
   s.add_development_dependency 'bundler', '~> 1.9'
   s.add_development_dependency 'rake',    '~> 10.0'
+
 end

lib/ants.rb

@@ -14,4 +14,5 @@ module Ants
   require "concerns/ants/slug"
   require "concerns/ants/publication"
   require "concerns/ants/sorted_relations"
+  require "concerns/ants/versions"
 end

lib/ants/version.rb

@@ -1,3 +1,3 @@
 module Ants
-  VERSION = "0.1.1"
+  VERSION = "0.1.2"
 end

lib/concerns/ants/versions.rb

@@ -0,0 +1,25 @@
+module Ants
+  module Versions
+    extend ActiveSupport::Concern
+
+    included do
+
+      # returns list of available object versions, requires
+      # include Mongoid::History::Trackable to be configured
+      def _document_versions
+        hash = {}
+
+        history_tracks.only(:created_at, :version).collect do |h|
+          hash[h.version] = "Version #{ h.version } — #{ h.created_at }"
+        end
+
+        if hash.empty?
+          hash = { '' => '--' }
+        end
+
+        return hash
+      end
+
+    end
+  end
+end