Struct Listing 

pub struct Listing<T: Source, Q = ()> { /* private fields */ }

A path parameter naming a field filters too, so a child is listed only under its own parent. Q reads the query’s other parameters, as crate::Query does; () reads none.

Implementations

impl<T: Source, Q> Listing<T, Q>

pub fn parameters(&self) -> Option<&Q>

None when a value was refused: the page then lists nothing and names the refusal.

pub fn where_(self, condition: Condition<T::Base>) -> Self

pub fn query(&self) -> Result<Query<T>>

pub async fn page(self, read: &Read) -> Result<Listed<T>>

A parent beyond the read’s reach is not found: an empty list would say it exists. A filter in error lists nothing, so no one reads an unfiltered list as a filtered one; a JSON caller or route gets the errors as a 422, as Self::query answers.

Trait Implementations

impl<A: Area, M, T: Source, Q: Input + FieldNames + Send> Resolve<RequestContext<A, M>> for Listing<T, Q>

fn resolve( context: &mut RequestContext<A, M>, ) -> impl Future<Output = Result<Self>> + Send