PostgreSQL array columns with normalization

[arBmind]

Columns that define a normalization like:

normalizes :nos, with: ->(value) { value&.reject(&:nil?)&.uniq&.sort }

Are not detected by paper_trail to contain arrays. As the type is wrapped with a ActiveRecord::Normalization::NormalizedValueType.

My Workaround:

PaperTrail::AttributeSerializers::AttributeSerializerFactory.redefine_singleton_method :ar_pg_array? do |obj|
  if defined?(::ActiveRecord::ConnectionAdapters::PostgreSQL::OID::Array)
    if obj.respond_to?(:cast_type)
      obj.cast_type.instance_of?(::ActiveRecord::ConnectionAdapters::PostgreSQL::OID::Array)
    else
      obj.instance_of?(::ActiveRecord::ConnectionAdapters::PostgreSQL::OID::Array)
    end
  else
    false
  end
end

If paper_trail fails to detect the array, the serialization becomes a hash with a values key that contains the array itself. But later fails do deserialize the json to a proper array.

Would it be better to use columns_hash[name].array to detect arrays and store use a noop-array-serializer, that is independent of Postgres?