[SOLVED] I need a real struct after a web::Json deserialize

I need a real struct after a web::Json deserialize

All examples about receiving a Json by POST are like this one. Json is received, deserialized and then used directly.

#[derive(Deserialize)]
struct Info {
    username: String,
}

async fn index(info: web::Json<Info>) -> impl Responder {
    format!("Welcome {}!", info.username)
}

But I don't want to use info.username in this function, I need to send info, as a parameter to another function, to be received as a Info struct.

Something like this:

let resultFromJsonProcess: String = process_input(info);

But it doesn't work. The main error is:

^^^^^^^ expected `Info`, found `Json<Info>`

I thought the info is already a well-formed struct, but I don't know if an unwrap() or something is needed.

Solution

Use .into_inner():

info.into_inner()

Or, Json is a tuple struct with public fields:

pub struct Json<T>(pub T);

So you can access the nested structure via the anonymous tuple field:

async fn index(info: web::Json<Info>) -> impl Responder {
    format!("Welcome {}!", info.0)
}

or by pattern matching:

async fn index(Json(info): web::Json<Info>) -> impl Responder {
    format!("Welcome {}!", info)
}