Trait OptionalFromRequestParts 

pub trait OptionalFromRequestParts<S>: Sized {
    type Rejection: IntoResponse;

    // Required method
    fn from_request_parts(
        parts: &mut Parts,
        state: &S,
    ) -> impl Future<Output = Result<Option<Self>, Self::Rejection>> + Send;
}

Customize the behavior of Option<Self> as a FromRequestParts extractor.

Required Associated Types

type Rejection: IntoResponse

If the extractor fails, it will use this “rejection” type.

A rejection is a kind of error that can be converted into a response.

Required Methods

fn from_request_parts( parts: &mut Parts, state: &S, ) -> impl Future<Output = Result<Option<Self>, Self::Rejection>> + Send

Perform the extraction.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<S> OptionalFromRequestParts<S> for MatchedPath

where S: Send + Sync,

type Rejection = Infallible

impl<T, S> OptionalFromRequestParts<S> for Extension<T>

where T: Clone + Send + Sync + 'static, S: Send + Sync,

type Rejection = Infallible

impl<T, S> OptionalFromRequestParts<S> for Path<T>

where T: DeserializeOwned + Send + 'static, S: Send + Sync,

type Rejection = PathRejection