lib/grape/validations/validators/default.rb in grape-0.14.0 vs lib/grape/validations/validators/default.rb in grape-0.15.0

@@ -13,10 +13,10 @@
       def validate!(params)
         return unless @scope.should_validate?(params)
 
         attrs = AttributesIterator.new(self, @scope, params)
         attrs.each do |resource_params, attr_name|
-          if resource_params[attr_name].nil?
+          if resource_params.is_a?(Hash) && resource_params[attr_name].nil?
             validate_param!(attr_name, resource_params)
           end
         end
       end
     end