Add support for Federation v2.3 spec

[moonflare]

Add support for Federation v2.3 spec

[dariuszkuc]

Hello 👋

There is an explicit error when we use @key on an interface, but the spec is not v2.3+. Do you think you might be worth covering that as well? Here is the error I'm mentioning. Currently, we can use @key on interfaces, even on specs lower than v2.3.

While the @key definition specified both OBJECT | INTERFACE as valid locations, it never actually worked. I believe composition would just ignore (or drop?) whatever was on the interface. Since it was ignored, implementing types could define completely different @keys or omit them altogether.

Therefore I think having an explicit error when using old fed versions makes more sense - i.e. otherwise end users might think that this feature works whereas it never did -> it is a user error. If this behavior is problematic we can probably change it to a warning message.

[dariuszkuc]

Hello 👋
Just released 2.3.0-alpha.0.

Will release final v2.3.0 once the Federation Spec goes GA.

[moonflare]

Thanks for the quick response @dariuszkuc 🙌🏻

This alpha version will help test the v2.3 spec, so thanks a lot for the release.

Before you release the final version of the v2.3.0 spec support, I would love to address some cases introduced by the new spec around the @interfaceObject directive/functionality. I already started working on a PR to addressing those, but will make sure to describe those here first and get some feedback before going any forward. Let me get back these days with some detailed cases we might need to cover in the final version.

[moonflare]

Hi @dariuszkuc
I just noticed that you extended the functionality here. I think that pretty much covers everything I had in mind, except one validation that was implemented in the federation package for the v2.3 spec.

There is an explicit error when we use @key on an interface, but the spec is not v2.3+. Do you think you might be worth covering that as well? Here is the error I'm mentioning. Currently, we can use @key on interfaces, even on specs lower than v2.3.

Thanks for the 2nd release 🙏🏻