Be able to pass a validator method to #validates

1 files changed, 6 insertions, 0 deletions

diff --git a/activemodel/lib/active_model/validations/with.rb b/activemodel/lib/active_model/validations/with.rb
index 200efd4eb5..16d81263a2 100644
--- a/activemodel/lib/active_model/validations/with.rb
+++ b/activemodel/lib/active_model/validations/with.rb
@@ -8,6 +8,12 @@ module ActiveModel
         end
     end
 
+    class WithValidator < EachValidator
+      def validate_each(record, attr, val)
+        record.send options[:with]
+      end
+    end
+
     module ClassMethods
       # Passes the record off to the class or classes specified and allows them
       # to add errors based on more complex conditions.