Theo's Typesafe Cult•5mo ago

Add parameters to tRPC Context

I would like to add the parameters of the type CreateNextContextOptions to my tRPC context in my t3-app project. I've looked through the documentation, but I cannot find a way to get the parameters to pass them to the createContext function in my createTRPCProxyClient definition in server.ts. In the docs, they just pass the typeof createTRPCContext as a generic in the initTRPC.context() function, which was done in a separate file when the project was generated. Does anyone know how I can get this to work?

const createContext = cache((opts: CreateNextContextOptions) => {
  const heads = new Headers(headers());
  heads.set("x-trpc-source", "rsc");

  return createTRPCContext({
    headers: heads,
  }, opts);
});

export const api = createTRPCProxyClient<AppRouter>({
  transformer,
  links: [
    loggerLink({
      enabled: (op) =>
        process.env.NODE_ENV === "development" ||
        (op.direction === "down" && op.result instanceof Error),
    }),
    () =>
      ({ op }) =>
        observable((observer) => {
          createContext()
                    // ^^ TS2554: Expected 1 arguments, but got 0
            .then((ctx) => {
              return callProcedure({
                procedures: appRouter._def.procedures,
                path: op.path,
                rawInput: op.input,
                ctx,
                type: op.type,
              });
            })
            .then((data) => {
              observer.next({ result: { data } });
              observer.complete();
            })
            .catch((cause: TRPCErrorResponse) => {
              observer.error(TRPCClientError.from(cause));
            });
        }),
  ],
});

const createContext = cache((opts: CreateNextContextOptions) => {
  const heads = new Headers(headers());
  heads.set("x-trpc-source", "rsc");

  return createTRPCContext({
    headers: heads,
  }, opts);
});

export const api = createTRPCProxyClient<AppRouter>({
  transformer,
  links: [
    loggerLink({
      enabled: (op) =>
        process.env.NODE_ENV === "development" ||
        (op.direction === "down" && op.result instanceof Error),
    }),
    () =>
      ({ op }) =>
        observable((observer) => {
          createContext()
                    // ^^ TS2554: Expected 1 arguments, but got 0
            .then((ctx) => {
              return callProcedure({
                procedures: appRouter._def.procedures,
                path: op.path,
                rawInput: op.input,
                ctx,
                type: op.type,
              });
            })
            .then((data) => {
              observer.next({ result: { data } });
              observer.complete();
            })
            .catch((cause: TRPCErrorResponse) => {
              observer.error(TRPCClientError.from(cause));
            });
        }),
  ],
});

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Add parameters to tRPC Context