Trait OptionalFromRequestContextRefPair

pub trait OptionalFromRequestContextRefPair<S>:
    Sized
    + Send
    + Sync
    + 'static {
    type Rejection: IntoResponse;

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

Customize the behavior of Option<Self> as a FromRequestContextRefPair 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_context_ref_pair( ctx: &Context<S>, parts: &Parts, ) -> 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, H> OptionalFromRequestContextRefPair<S> for TypedHeader<H>

where S: Clone + Send + Sync + 'static, H: Header + Send + Sync + 'static,

type Rejection = TypedHeaderRejection

impl<T, S> OptionalFromRequestContextRefPair<S> for Query<T>

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

type Rejection = FailedToDeserializeQueryString