UUID typecasting

[ekampp]

Hi there.

I'm using Neo4J, which uses this gem for attribute declaration.

I'm also building a Rails app that uses UUIDs as primary keys in my Postgres database. I would like to be able to reference these primary keys, e.g. user_id, and have them be of the UUID type.

This could look something like:

class Node
  include ActiveAttr::TypecastedAttributes
  attribute :user_id, type: UUID
end

Currently, I'm using type: String, but that doesn't ensure that the given value is actually a UUID, and I have to write Active Model validators to ensure this, which is a bit of a pain.

Any pointers on where to start working on a PR is much appreciated. Thanks.

[mathieujobin]

problem is, non-string uuid are just large numbers. so the validation is even more tricky