Added some kind of odd support for i18n interpolation in the custom :…

…message messages for the live validations. E.g. :message => "but srsly, {{model}}" will be translated and used as "but srsly, Post" in the live validations.

lib/live_validations/adapter/validation_hook.rb

@@ -45,7 +45,15 @@ def setup
       # Returns a user specified validatior error message, or falls back to the default
       # I18n error message for the passed key.
       def message_for(key)
-        callback.options[:message] || I18n.translate('activerecord.errors.messages')[key]
+        handwritten_message || I18n.translate('activerecord.errors.messages')[key]
+      end
+
+      def handwritten_message
+        return unless callback.options[:message]
+
+        I18n.backend.send(:interpolate, I18n.locale, callback.options[:message], {
+          :model => adapter_instance.active_record_instance.class.human_name
+        })
       end
 
       # Returns the string that the validator should use as a regex in the javascripts.

test/general_adapter_test.rb

@@ -13,10 +13,19 @@ def teardown
   end
 
   def test_message_for_with_custom_message
-    @hook.expects(:callback).returns(OpenStruct.new(:options => {:message => "Yep!"}))
+    @hook.expects(:callback).at_least_once.returns(OpenStruct.new(:options => {:message => "Yep!"}))
+    @hook.expects(:adapter_instance).returns(OpenStruct.new(:active_record_instance => @post))
+
     assert_equal "Yep!", @hook.message_for(:blank)
   end
 
+  def test_message_for_with_l18n_fancy_message
+    @hook.expects(:callback).at_least_once.returns(OpenStruct.new(:options => {:message => "The {{model}}"}))
+    @hook.expects(:adapter_instance).returns(OpenStruct.new(:active_record_instance => @post))
+
+    assert_equal "The Post", @hook.message_for(:blank)
+  end
+
   def test_message_for_without_custom_message
     @hook.expects(:callback).returns(OpenStruct.new(:options => {}))
     assert_equal I18n.translate('activerecord.errors.messages')[:blank], @hook.message_for(:blank)