Dynamic schema passing

[chilarai]

I am using graphql-http with Fastify and it's amazing. But, I wanted to know, if I can pass dynamic schema inside the createHandler function depending on the different route param?

Lets say I have the pseudo following code

const schema1 = ....
const schema2 = ....

fastify.all("/:id/graphql", createHandler({ CONDITIONAL_SCHEMA_SELECTION }));

Here, can I populate the CONDITIONAL_SCHEMA_SELECTION based on :id in the url?

[enisdenjo]

The schema option of the handler accepts a function which you can use to dynamically set the schema. The first argument is the request which you can use to parse the URL info (the request.raw contains the actual Fastify request).

[chilarai]

Hey @enisdenjo, thanks for the reply. Do you mean like this?

fastify.all(
    "/:id/graphql",
    createHandler((req: any): GraphQLSchema => {
        return schema2;
    })
);

[enisdenjo]

No, schema is a property in the handler options.

fastify.all(
    "/:id/graphql",
    createHandler({
        schema: (req) => {
           return schema2;
        }
    })
);

[chilarai]

Thanks