lib/administrate/field/base.rb in administrate-0.20.1 vs lib/administrate/field/base.rb in administrate-1.0.0.beta1

@@ -54,16 +54,16 @@
 
       def required?
         return false unless resource.class.respond_to?(:validators_on)
 
         resource.class.validators_on(attribute).any? do |v|
-          next false unless v.class == ActiveRecord::Validations::PresenceValidator
+          next false unless v.instance_of?(ActiveRecord::Validations::PresenceValidator)
 
           options = v.options
           next false if options.include?(:if)
           next false if options.include?(:unless)
 
-          if on_option = options[:on]
+          if (on_option = options[:on])
             if on_option == :create && !resource.persisted?
               next true
             end
 
             if on_option == :update && resource.persisted?