Remove i18n symbol dependency

date.order is the only key in rails i18n that is required to be a
symbol. This patch allows for symbols or strings which means:

* No requirement for symbol type in .yml files. A future
  YAML.safe_load wouldn't need to load symbols
* Rails could actually use json rather than yml as the backend

2 files changed, 9 insertions, 3 deletions

diff --git a/actionpack/lib/action_view/helpers/date_helper.rb b/actionpack/lib/action_view/helpers/date_helper.rb
index cf978d8e83..3af9116135 100644
--- a/actionpack/lib/action_view/helpers/date_helper.rb
+++ b/actionpack/lib/action_view/helpers/date_helper.rb
@@ -880,6 +880,7 @@ module ActionView
 
         def translated_date_order
           date_order = I18n.translate(:'date.order', :locale => @options[:locale], :default => [])
+          date_order.map! { |element| element.to_sym }
 
           forbidden_elements = date_order - [:year, :month, :day]
           if forbidden_elements.any?
diff --git a/actionpack/test/template/date_helper_i18n_test.rb b/actionpack/test/template/date_helper_i18n_test.rb
index 495a9d3f9d..21fca35185 100644
--- a/actionpack/test/template/date_helper_i18n_test.rb
+++ b/actionpack/test/template/date_helper_i18n_test.rb
@@ -117,7 +117,7 @@ class DateHelperSelectTagsI18nTests < ActiveSupport::TestCase
       I18n.expects(:translate).with(('datetime.prompts.' + key.to_s).to_sym, :locale => 'en').returns prompt
     end
 
-    I18n.expects(:translate).with(:'date.order', :locale => 'en', :default => []).returns [:year, :month, :day]
+    I18n.expects(:translate).with(:'date.order', :locale => 'en', :default => []).returns %w(year month day)
     datetime_select('post', 'updated_at', :locale => 'en', :include_seconds => true, :prompt => true)
   end
 
@@ -129,15 +129,20 @@ class DateHelperSelectTagsI18nTests < ActiveSupport::TestCase
   end
 
   def test_date_or_time_select_given_no_order_options_translates_order
-    I18n.expects(:translate).with(:'date.order', :locale => 'en', :default => []).returns [:year, :month, :day]
+    I18n.expects(:translate).with(:'date.order', :locale => 'en', :default => []).returns %w(year month day)
     datetime_select('post', 'updated_at', :locale => 'en')
   end
 
   def test_date_or_time_select_given_invalid_order
-    I18n.expects(:translate).with(:'date.order', :locale => 'en', :default => []).returns [:invalid, :month, :day]
+    I18n.expects(:translate).with(:'date.order', :locale => 'en', :default => []).returns %w(invalid month day)
 
     assert_raise StandardError do
       datetime_select('post', 'updated_at', :locale => 'en')
     end
   end
+
+  def test_date_or_time_select_given_symbol_keys
+    I18n.expects(:translate).with(:'date.order', :locale => 'en', :default => []).returns [:year, :month, :day]
+    datetime_select('post', 'updated_at', :locale => 'en')
+  end
 end