Trait django_query::ordering::SortVisitor

pub trait SortVisitor {
    type Target;
    fn visit_sort<F, T, S>(&mut self, name: &str, field: &F, sort: &S)
    where
        F: Field<Self::Target, Value = T> + 'static,
        S: SorterTypedClass<T> + 'static,
        <S as SorterTypedClass<T>>::Sorter: 'static;
    fn visit_key_sort<F, T>(&mut self, name: &str, field: &F, sort_key: &str)
    where
        F: Field<Self::Target, Value = T> + 'static,
        T: Sortable + 'static;
}

Something that can receive callbacks about the sort orders a type provides.

Each Sortable instance will accept a SortVisitor and describe to it the list of sorts it supports, using the provided methods.

Associated Types

type Target

Required methods

fn visit_sort<F, T, S>(&mut self, name: &str, field: &F, sort: &S) where
    F: Field<Self::Target, Value = T> + 'static,
    S: SorterTypedClass<T> + 'static,
    <S as SorterTypedClass<T>>::Sorter: 'static, 

Receive a basic sort on a given raw Field, named name. The comparison operator itself is given as sort.

fn visit_key_sort<F, T>(&mut self, name: &str, field: &F, sort_key: &str) where
    F: Field<Self::Target, Value = T> + 'static,
    T: Sortable + 'static, 

Receive a key sort on a member field which is itself Sortable.

Here, name is the name of the sort as usual, field is the accessor for the member, and sort_key is the name of the sort in the field’s own type which should be used.

Implementors

impl<R: Sortable> SortVisitor for OrderingSet<R>

type Target = R