appengine/rails-hello_world/config/initializers/cookies_serializer.rb

# Copyright 2017 Google, Inc
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Be sure to restart your server when you modify this file.

# Specify a serializer for the signed and encrypted cookie jars.
# Valid options are :json, :marshal, and :hybrid.
Rails.application.config.action_dispatch.cookies_serializer = :json