Support for using GlobalID with configurable columns

[tylerwillingham]

I currently work in an application that's using auto-incremented primary keys for GIDs and would like to migrate to using our external_id columns that we've started adding to various models. We can sidestep rails/globalid and do this if we need to, but I sensed in #135 that there may be an appetite from others for this kind of thing.

I think this is achievable/configurable on a per-model basis pretty cleanly so I'll put up a PR with some passing tests and get a sense for what the maintainers think

[Kamilove137]

Nkann

[Kamilove137]

Hi

[DaanVanVugt]

@tylerwillingham did you end up monkey-patching this? We have a similar situation, with friendly_id and with a preference to not provide database primary key IDs to our customers.

[tylerwillingham]

@DaanVanVugt no, we're using signed, unexpiring GIDs in many places now.

I think this is a better direction for our use case and it doesn't seem that novel. I'd be happy to continue to pursue it if there were any signal from the maintainers