Merge pull request rails#6517 from purcell/validates-false-value

Don't enable validations when passing false hash values to ActiveModel.validates

Author: josevalim

activemodel/CHANGELOG.md

@@ -1,5 +1,7 @@
 ## Rails 4.0.0 (unreleased) ##
 
+*   Passing false hash values to `validates` will no longer enable the corresponding validators *Steve Purcell*
+
 *   `ConfirmationValidator` error messages will attach to `:#{attribute}_confirmation` instead of `attribute` *Brian Cardarella*
 
 *   Added ActiveModel::Model, a mixin to make Ruby objects work with AP out of box *Guillermo Iguaran*

activemodel/lib/active_model/validations/validates.rb

@@ -88,6 +88,7 @@ def validates(*attributes)
         defaults.merge!(:attributes => attributes)
 
         validations.each do |key, options|
+          next unless options
           key = "#{key.to_s.camelize}Validator"
 
           begin

activemodel/test/cases/validations_test.rb

@@ -330,6 +330,11 @@ def test_validates_with_bang
     end
   end
 
+  def test_validates_with_false_hash_value
+    Topic.validates :title,  :presence => false
+    assert Topic.new.valid?
+  end
+
   def test_strict_validation_error_message
     Topic.validates :title, :strict => true, :presence => true