Optional Path parameter

[qarmin]

When I tried to use this route, then actix properly returned code 200 for get http://127.0.0.1:8081/patient-info/

#[get("/patient-info/")]
pub async fn AAAA(
    pool: web::Data<DbPool>,
) -> anyhow::Result<HttpResponse, Error> {
    Ok(HttpResponse::Ok().body("ABCD"))
}

but when I used this one, then same get returned 404

#[get("/patient-info/{eye}")]
pub async fn AAAA(
    pool: web::Data<DbPool>,
    path: web::Json<Option<String>>,
) -> anyhow::Result<HttpResponse, Error> {
    Ok(HttpResponse::Ok().body("ABCD"))
}

How can I get eye value(can be none if request is patient-info/ or not none when using patient-info/LEFT)?

[robjtede]

#[get("/patient-info/{eye}")]
pub async fn AAAA(
    pool: web::Data<DbPool>,
    path: web::Path<String>,
) -> anyhow::Result<HttpResponse, Error> {
    Ok(HttpResponse::Ok().body("ABCD"))
}

Though Option<String> will not work here. You'll need two handlers and a delegate method. Eg:

#[get("/patient-info")]
pub async fn aaa(
    pool: web::Data<DbPool>,
    path: web::Path<String>,
) -> Result<HttpResponse, Error> {
  aaaa_inner(&pool, None)
}

#[get("/patient-info/{eye}")]
pub async fn aaaa_eye(
    pool: web::Data<DbPool>,
    path: web::Path<String>,
) -> Result<HttpResponse, Error> {
  aaaa_inner(&pool, Some(path.into_inner()))
}

async fn aaaa_inner(pool: &DbPool, path: Option<String>) -> Result<HttpResponse, Error> {
  ...
}

[happybeing]

I have the same question, but not just how to implement the functionality. I am using utoipa's swagger support, but guess there's no way to have this appear as a single route with optional path parameter in the SwaggerUI.

Having two similar routes in the docs and SwaggerUI is I guess the only option here.

[robjtede]

OpenAPI (previously swagger) doesn't actually allow optional path parameters. These are semantically two different resource paths.