Yoga's `useResponseCache` plugin breaks subscriptions

[gthau]

Describe the bug

When using the Yoga's plugin useResponseCache, subscriptions stop working with error:

• for named subscription "Subscription \"testSub\" must select only one top level field."
• for anonymous subscription: "Anonymous Subscription must select only one top level field."

Disabling the plugin (either by not importing it or conditionally using it) makes the subscriptions work again as expected.

Your Example Website or App

https://codesandbox.io/p/sandbox/silly-lucy-sm9x48

Steps to Reproduce the Bug or Issue

1. Launch yarn dev or yarn start, the response cache plugin is enabled, run the default query and observe the error
2. Launch yarn dev:no-cache or yarn start:no-cache, the response cache is disabled, run the default query and observe it's working as expected

Expected behavior

The response cache should not affect the subscriptions, they should work as expected and not be cached.

Screenshots or Videos

No response

Platform

• OS: Linux
• NodeJS: 16
• graphql-yoga version 4.0.4
• @graphql-yoga/plugin-response-cache version 2.1.1

Additional context

No response

[EmrysMyrddin]

Ok, I finally managed to run the CI on my branch. Sorry for the delay It's relying on a open PR so I had some rebasing issues...

You can try out @graphql-yoga/plugin-response-cache@2.2.0-alpha-20230922084337-37bdcd05, it should fix your issue. I will try to release this change as soon as possible, but it will probably have to wait until monday, the team is not very available this week :-)

[gthau]

Ok, I finally managed to run the CI on my branch. Sorry for the delay It's relying on a open PR so I had some rebasing issues...

You can try out @graphql-yoga/plugin-response-cache@2.2.0-alpha-20230922084337-37bdcd05, it should fix your issue. I will try to release this change as soon as possible, but it will probably have to wait until monday, the team is not very available this week :-)

Tested, it's working for me. I tested both in the codesandbox provided in this issue with a striped down Yoga project, and on my work project using Yoga Driver in NestJS.

Thank you!

No rush to deliver the fix for me, I need it in ~10 days.