Struct Config 

pub struct Config<T>(pub Arc<T>);

One section of this request’s configuration.

async fn handler(db: Config<Database>) -> String {
    db.host.clone()
}

Extracting the same type twice in one handler answers the same Arc. Extracting one the middleware was not given answers 500 — see SnapshotMissing.

Tuple Fields

0: Arc<T>

Trait Implementations

impl<T> Clone for Config<T>

fn clone(&self) -> Self

Hand-written: cloning an Arc never needs T: Clone.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T> Debug for Config<T>

fn fmt(&self, formatter: &mut Formatter<'_>) -> Result

The type’s name, never the section’s contents — a section holds credentials, and ?config is how one reaches a log line.

impl<T> Deref for Config<T>

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<T> FromRequest for Config<T>

where T: Any + Send + Sync,

type Error = Error

The associated error which can be returned.

type Future = Ready<Result<Config<T>, Error>>

Future that resolves to a Self.

fn from_request(request: &HttpRequest, _payload: &mut Payload) -> Self::Future

Create a Self from request parts asynchronously.

fn extract(req: &HttpRequest) -> Self::Future

Create a Self from request head asynchronously.