More info about caching about graphql-shield

[jvbianchi]

Oh, now I understand.

I think you could put this info on the readme.

[maticzav]

Hey @jvbianchi 👋

You are right, the cache is stored for each request separately. The outcome of each permission function is saved under function's name in the context of a resolver - context is the only value that is being passed through all the resolvers in the chain.

To use the cache you have to use the same function (name) in two different permission levels.

// caches
const auth = () => authorise
const permissions = {
   Query: {
      user: auth
   },
   User: {
      secret: auth
   },
}

This, for example, wouldn't work, because we have no way of telling how is your permission connected with your logic - we need to know the name of the function to make a reference (functions with the same name are considered to do the same thing).

// doesn't cache
const permissions = {
   Query: {
      user: () => authorise
   },
   User: {
      secret: () => authorise
   },
}