From 1318bf6e33fe07bcc9fe50854b0bbb4627e71e88 Mon Sep 17 00:00:00 2001
From: wycats <wycats@gmail.com>
Date: Tue, 3 Aug 2010 11:47:19 -0700
Subject: [PATCH] Properly deprecate validate_on_#{on}

---
 activemodel/lib/active_model/validations.rb | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/activemodel/lib/active_model/validations.rb b/activemodel/lib/active_model/validations.rb
index 3407c59e7a..32e3cb5b79 100644
--- a/activemodel/lib/active_model/validations.rb
+++ b/activemodel/lib/active_model/validations.rb
@@ -128,6 +128,18 @@ module ActiveModel
         set_callback(:validate, *args, &block)
       end
 
+      [:create, :update].each do |type|
+        class_eval <<-RUBY
+          def validate_on_#{type}(*args, &block)
+            msg = "validate_on_#{type} is deprecated. Please use validate(args, :on => :#{type})"
+            ActiveSupport::Deprecation.warn(msg, caller)
+            options = args.last || {}
+            options[:on] = :#{type}
+            validate(args.push(options), &block)
+          end
+        RUBY
+      end
+
       # List all validators that are being used to validate the model using 
       # +validates_with+ method.
       def validators