fetchQuery not supporting store-and-network and store-only fetch policies

[skrabe]

Hi everyone,

After getting an error in my app and after looking at the fetchQuery function, I found out store-and-network and store-only fetch policies are not supported. Is there any detailed explanation on why?

Also, it would be nice to have it covered in the docs if it stays unsupported.

[captbaritone]

Sounds like this might be a bug in the community typescript types. In Flow we only allow 'store-or-network' | 'network-only'. The idea is that fetchQuery is explicitly about making network requests. https://github.com/facebook/relay/blob/main/packages/relay-runtime/util/RelayRuntimeTypes.js#L72

If someone is up to it, it would be great if we could get:

1. An update to the TypeScript types
2. An update to the docs here:

   relay/website/docs/api-reference/relay-runtime/fetch-query.md

   Line 4 in 4130d41

   slug: /api-reference/fetch-query/

   documenting the fetchPolicy options.

Update: I'm interpreting "After getting an error in my app" as you got a runtime error. If you got a type error, than maybe item 1 is not needed.