Apollo-server: [hapi] Dynamically fetch schema on request

[TdyP]

Hi guys,
I've one question about graphQL server (using it with Hapi):
On my project, user can create entities types and add new fields.
These kind of actions generates a new schema with these new informations.
Re generating the schema is not an issue, but I don't know how to tell the server to use this new version.

Basically, all I would like is, in plugin options, being able to pass a function to retrieve the schema and not the schema itself.

Is there a way to do that? Or a way to "refresh" the server when the schema is updated, without having to fully restart the server.

Thanks!

[TdyP]

Finally resolved this myself.
The graphqlOptions when you register your plugin accepts a function returning an object.

    server.register({
        register: graphqlHapi,
        options: {
            path: '/graphql',
            graphqlOptions: () => ({ schema: graphqlService.schema })
        }
    });

This function will be called on each query, so you can fetch a fresh schema on each query.
Make sure you have some caching somewhere to avoid generating the whole schema each time you receive a request.