Different middleware for different groups

[cemoktra]

let app = Router::new()
    .route("/", get(root))
    .route("/some", get(some))
    .layer(auth)
    .route("/", post(root))
    .layer(auth)
    .layer(db)
    .route("/login", post(login))  // no layer

Is this valid code? The documentation just creates one group. What about multiple/different groups and combination with groups without layer.

[davidpdrsn]

While it is valid it probably doesn't do what you want. layer applies to all routes above it, meaning auth is applied twice to the first two routes.

You can do something like this instead:

let foo = Router::new()
    .route("/", get(root))
    .route("/some", get(some))
    .layer(auth);

let bar = Router::new()
    .route("/", post(root))
    .layer(auth)
    .layer(db);

let baz = Router::new()
    .route("/login", post(login));

let app = foo.or(bar).or(baz);

[cemoktra]

Thanks. Would be nice to have this in docs/examples

[davidpdrsn]

Good point! I'll add it right now :)

[hkaiser25]

Does the .or method still work on Router? I get this compiler error:
no method named `or` found for struct `axum::Router` in the current scope method not found in `Router<AppState>`
I'm using axum 0.7.4.

[jplatte]

Router::or was renamed to merge in v0.3.0, but the same principle still applies.