lib/graphql/subscriptions.rb in graphql-2.3.16 vs lib/graphql/subscriptions.rb in graphql-2.3.17

@@ -248,10 +248,12 @@
     # @param args [Hash, Array, Any] some GraphQL input value to coerce as `arg_owner`
     # @return [Any] normalized arguments value
     def normalize_arguments(event_name, arg_owner, args, context)
       case arg_owner
       when GraphQL::Schema::Field, Class
+        return args if args.nil?
+
         if arg_owner.is_a?(Class) && !arg_owner.kind.input_object?
           # it's a type, but not an input object
           return args
         end
         normalized_args = {}
@@ -300,10 +302,10 @@
           raise InvalidTriggerError, "Can't trigger Subscription.#{event_name}, received undefined arguments: #{missing_arg_names.join(", ")}. (Should match arguments of #{arg_owner_name}.)"
         end
 
         normalized_args
       when GraphQL::Schema::List
-        args.map { |a| normalize_arguments(event_name, arg_owner.of_type, a, context) }
+        args&.map { |a| normalize_arguments(event_name, arg_owner.of_type, a, context) }
       when GraphQL::Schema::NonNull
         normalize_arguments(event_name, arg_owner.of_type, args, context)
       else
         args
       end