Merge branch 'master' into loofah

Conflicts:
	actionpack/CHANGELOG.md
	actionpack/test/controller/integration_test.rb
	actionview/CHANGELOG.md

1 files changed, 6 insertions, 0 deletions

diff --git a/activemodel/lib/active_model/validations.rb b/activemodel/lib/active_model/validations.rb
index cf97f45dba..f67a3be5c1 100644
--- a/activemodel/lib/active_model/validations.rb
+++ b/activemodel/lib/active_model/validations.rb
@@ -141,6 +141,11 @@ module ActiveModel
       #   value.
       def validate(*args, &block)
         options = args.extract_options!
+
+        if args.all? { |arg| arg.is_a?(Symbol) }
+          options.assert_valid_keys([:on, :if, :unless])
+        end
+
         if options.key?(:on)
           options = options.dup
           options[:if] = Array(options[:if])
@@ -148,6 +153,7 @@ module ActiveModel
             Array(options[:on]).include?(o.validation_context)
           }
         end
+
         args << options
         set_callback(:validate, *args, &block)
       end