Context params

[dandeduck]

I wanted to receive ctx : Context on my controllers, but it turns out that it lacks some fields compared to any, such as ctx.params. I saw a similar issue where the issuer was told to use ctx.request.url.searchParams but it was always empty, even when ctx.params wasn't. Is there a way to get it without using the any type? I assume that I am missing something...

If you want to take a look at the source code, it's in this project: https://github.com/dandeduck/weebify-leaderboard under the development branch

[kitsonk]

There is no code in that repo.

ctx.params is specifically a RouterContext "thing" and doesn't exist on Context. It will only exist in RouterMiddleware.

[dandeduck]

under the development branch

There is code, but anyway... It was hard to know that RouterContext is a things, since even when printing it (under any), it says Context. Thanks for the answer!

[kitsonk]

Because it is only an interface, it doesn't exist at runtime. If you add RouterMiddleware to an instance of the Router, you will noticed that the context is contually inferred to be RouterContext and will try to infer the generics around the route params and state.

If you are trying to create standalone middleware you will then add to a router, best to declare it is something like this:

import type { RouterMiddleware, RouteParams, State } from "https://deno.land/x/[email protected]/mod.ts";

interface MyParams extends RouteParams {
  // ...
}

interface MyState extends State {
  // ...
}

const myMiddleWare: RouterMiddleware<MyParams, MyState> = (ctx, next) => {
  // ctx and next will be typed correctly
};