Make Rails properly decode hashes and arrays in JSONB fields

fix_active_record_jsonb.rb

# See https://til.magmalabs.io/posts/eb568eed39-make-rails-properly-decode-hashes-and-arrays-in-jsonb-fields-the-way-god-intended

ActiveRecord::Type::Json.class_eval do
  # this is a json field, thus always decode it
  def deserialize(value)
    ActiveSupport::JSON.decode(value) rescue nil
  end

  def serialize(value)
    if value.is_a?(::Array) || value.is_a?(::Hash)
      ::ActiveSupport::JSON.encode(value)
    elsif value.is_a?(::String) && value.start_with?("{", "[") && value.end_with?("}", "]")
      value
    elsif value.respond_to?(:to_json)
      value.to_json
    else
      value
    end
  end
end