Why does returning UUID lead to a compilation error?

[finlaydotb]

I have an endpoint which upon creation of a resource returns the UUID as part of the OK response. The code that defines what is returned is as follows

#[derive(ApiResponse)]
enum Response {
    #[oai(status = 200)]
    Ok(Uuid),
    #[oai(status = 500)]
    InternalError,
}

But when I try to build, it fails with the following errors

157 | #[derive(ApiResponse)]
    |          ^^^^^^^^^^^ the trait `IntoResponse` is not implemented for `Uuid`
    |
    = help: the following other types implement trait `IntoResponse`:
              &'static [u8]
              &'static str
              ()
              (HeaderMap, T)
              (StatusCode, HeaderMap, T)
              (StatusCode, T)
              Body
              CreateResponse
            and 35 others
    = note: this error originates in the derive macro `ApiResponse` (in Nightly builds, run with -Z macro-backtrace for more info)

...

157 | #[derive(ApiResponse)]
    |          ^^^^^^^^^^^ the trait `Payload` is not implemented for `Uuid`
    |
    = help: the following other types implement trait `Payload`:
              EventStream<T>
              PlainText<T>
              poem_openapi::payload::Attachment<T>
              poem_openapi::payload::Base64<T>
              poem_openapi::payload::Binary<T>
              poem_openapi::payload::Form<T>
              poem_openapi::payload::Html<T>
              poem_openapi::payload::Json<T>
            and 2 others
    = note: required for `Uuid` to implement `ResponseContent`
    = note: this error originates in the derive macro `ApiResponse` (in Nightly builds, run with -Z macro-backtrace for more info)

Some errors have detailed explanations: E0277, E0382.
For more information about an error, try `rustc --explain E0277`.

My cargo entry is

poem = "1.3.54"
poem-openapi = { version = "2.0.26", features = ["swagger-ui", "chrono", "uuid"] }

And I made sure to enable the uuid feature flag but still code does not compile.

Any reason why?

[finlaydotb]

Ok, the problem was trying to return a blanket Uuid. The way to go is to return poem_openapi::Json<Uuid> instead and not just a blanket Uuid.

so this worked

#[derive(ApiResponse)]
enum Response {
    #[oai(status = 200)]
    Ok(poem_openapi::Json<Uuid>),
    #[oai(status = 500)]
    InternalError,
}