tiny refactoring

use :default option with translate method instead of condition
simplify separator method

actionpack/lib/action_view/helpers/date_helper.rb

@@ -508,7 +508,7 @@ def select_hour(datetime, options = {}, html_options = {})
 
       # Returns a select tag with options for each of the days 1 through 31 with the current day selected.
       # The <tt>date</tt> can also be substituted for a day number.
-      # If you want to display days with a leading zero set the <tt>:use_two_digit_numbers</tt> key in +options+ to true.      
+      # If you want to display days with a leading zero set the <tt>:use_two_digit_numbers</tt> key in +options+ to true.
       # Override the field name using the <tt>:field_name</tt> option, 'day' by default.
       #
       # ==== Examples
@@ -854,7 +854,7 @@ def date_order
         end
 
         def translated_date_order
-          date_order = I18n.translate(:'date.order', :locale => @options[:locale]) || []
+          date_order = I18n.translate(:'date.order', :locale => @options[:locale], :default => [])
 
           forbidden_elements = date_order - [:year, :month, :day]
           if forbidden_elements.any?
@@ -990,18 +990,12 @@ def build_selects_from_types(order)
         # Returns the separator for a given datetime component.
         def separator(type)
           case type
-            when :year
-              @options[:discard_year] ? "" : @options[:date_separator]
-            when :month
-              @options[:discard_month] ? "" : @options[:date_separator]
-            when :day
-              @options[:discard_day] ? "" : @options[:date_separator]
+            when :year, :month, :day
+              @options[:"discard_#{type}"] ? "" : @options[:date_separator]
             when :hour
               (@options[:discard_year] && @options[:discard_day]) ? "" : @options[:datetime_separator]
-            when :minute
-              @options[:discard_minute] ? "" : @options[:time_separator]
-            when :second
-              @options[:include_seconds] ? @options[:time_separator] : ""
+            when :minute, :second
+              @options[:"discard_#{type}"] ? "" : @options[:time_separator]
           end
         end
     end

actionpack/test/template/date_helper_i18n_test.rb

@@ -103,7 +103,7 @@ def test_date_or_time_select_translates_prompts
       I18n.expects(:translate).with(('datetime.prompts.' + key.to_s).to_sym, :locale => 'en').returns prompt
     end
 
-    I18n.expects(:translate).with(:'date.order', :locale => 'en').returns [:year, :month, :day]
+    I18n.expects(:translate).with(:'date.order', :locale => 'en', :default => []).returns [:year, :month, :day]
     datetime_select('post', 'updated_at', :locale => 'en', :include_seconds => true, :prompt => true)
   end
 
@@ -115,12 +115,12 @@ def test_date_or_time_select_given_an_order_options_does_not_translate_order
   end
 
   def test_date_or_time_select_given_no_order_options_translates_order
-    I18n.expects(:translate).with(:'date.order', :locale => 'en').returns [:year, :month, :day]
+    I18n.expects(:translate).with(:'date.order', :locale => 'en', :default => []).returns [: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').returns [:invalid, :month, :day]
+    I18n.expects(:translate).with(:'date.order', :locale => 'en', :default => []).returns [:invalid, :month, :day]
 
     assert_raise StandardError do
       datetime_select('post', 'updated_at', :locale => 'en')