hono/zod-openapi route groups don't populate into doc endpoint

[DaveLo]

Following along the route groups documentation with openapi and the app is functional, but the openapi docs are empty. If I move the customer route into the main app file the docs generate as expected.

//customers.ts

const customers = new OpenAPIHono<EnvBindings>();

const customerRoute = createRoute({
  method: "get",
  path: "/{id}"
  request: { ...request schema }
  responses: { ...response schema }
});

customers.openapi(customerRoute, (c) => c.json({foo:'bar'}));

export default customers;

// main.ts
import customers from "./customers";

const app = new OpenAPIHono<EnvBindings>();
app.route("/customers", customers);

app.doc("/doc", {
  openapi: "3.0.0",
  info: { title: "my api" }
});

export const handler = handle(app)

Expected behavior

The generated openapi doc in the separate file merges with the main app to stitch the api together.

Actual behavior

The /doc route displays an empty {}

[tialki]

Not the same OpenAPIHono instances?

[DaveLo]

Not the same OpenAPIHono instances?

No, I was trying to use route grouping with the openapi middleware. Would I need to pass the app around more like a dependency injection to a create{X}Routes function? I'm trying to colocate the code and the route for clarity in maintaining each base route branch.

[vthang95]

I encountered the same issue after separating APIs into multiple route files.

[raiyansarker]

Having the same issue, is there any update so far?