Merge pull request codegram#13 from cryo28/master

Russian locale and dates interpolated into validation error messages are localized themselves by using I18n.localize

.rvmrc

@@ -1 +1 @@
-rvm --create use ruby-1.9.2@date_validator
+rvm use ruby-1.9.2@date_validator --create

lib/active_model/validations/date_validator.rb

@@ -62,7 +62,10 @@ def validate_each(record, attr_name, value)
           end
 
           unless is_time?(option_value) && value.to_i.send(CHECKS[option], option_value.to_i)
-            record.errors.add(attr_name, option, options.merge(:value => original_value, :date => original_option_value))
+            record.errors.add(attr_name, option, options.merge(
+                :value => original_value,
+                :date  => (I18n.localize(original_option_value) rescue original_option_value)
+            ))
           end
         end
       end
@@ -73,5 +76,23 @@ def is_time?(object)
         object.is_a?(Time) || (defined?(Date) and object.is_a?(Date)) || (defined?(ActiveSupport::TimeWithZone) and object.is_a?(ActiveSupport::TimeWithZone))
       end
     end
+
+    module HelperMethods
+      # Validates whether the value of the specified attribute is a validate Date
+      #
+      #   class Person < ActiveRecord::Base
+      #     validates_date_of :payment_date, :after => :packaging_date
+      #     validates_date_of :expiration_date, :before => Proc.new { Time.now }
+      #   end
+      #
+      # Configuration options:
+      # * <tt>:after</tt> - check that a Date is after the specified one.
+      # * <tt>:before</tt> - check that a Date is before the specified one.
+      # * <tt>:after_or_equal_to</tt> - check that a Date is after or equal to the specified one.
+      # * <tt>:before_or_equal_to</tt> - check that a Date is before or equal to the specified one.
+      def validates_date_of(*attr_names)
+        validates_with DateValidator, _merge_attributes(attr_names)
+      end
+    end
   end
 end

locales/ru.yml

@@ -0,0 +1,8 @@
+ru:
+  errors:
+    messages:
+      not_a_date: "неверный формат"
+      after: "должна быть позднее чем %{date}"
+      after_or_equal_to: "должна равняться или быть позднее чем %{date}"
+      before: "должна быть ранее чем %{date}"
+      before_or_equal_to: "должна равняться или быть ранее чем %{date}"

spec/date_validator_spec.rb

@@ -57,7 +57,7 @@ module Validations
 
                   model = TestRecord.new(model_date)
                   model.should_not be_valid
-                  model.errors[:expiration_date].should eq(["must be " + check.to_s.gsub('_',' ') + " #{now}"])
+                  model.errors[:expiration_date].should eq(["must be " + check.to_s.gsub('_',' ') + " #{I18n.localize(now)}"])
                 end
               end
           end