Struct diesel::expression::helper_types::Desc

pub struct Desc<Expr> { /* fields omitted */ }

Methods

impl<Expr> Desc<Expr>

fn new(expr: Expr) -> Self

Trait Implementations

impl<Expr: Debug> Debug for Desc<Expr>

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<Expr: Clone> Clone for Desc<Expr>

fn clone(&self) -> Desc<Expr>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<Expr: Copy> Copy for Desc<Expr>

impl<Expr> QueryId for Desc<Expr> where
    Expr: QueryId, 

type QueryId = Desc<Expr::QueryId>

fn has_static_query_id() -> bool

fn query_id() -> Option<TypeId>

impl<Expr, QS> SelectableExpression<QS> for Desc<Expr> where
    Desc<Expr>: AppearsOnTable<QS>,
    Expr: SelectableExpression<QS>, 

impl<Expr, QS> AppearsOnTable<QS> for Desc<Expr> where
    Desc<Expr>: Expression,
    Expr: AppearsOnTable<QS>, 

impl<Expr> Expression for Desc<Expr> where
    Expr: Expression, 

type SqlType = ()

impl<Expr> NonAggregate for Desc<Expr> where
    Expr: NonAggregate, 

impl<Expr, DB> QueryFragment<DB> for Desc<Expr> where
    Expr: QueryFragment<DB>,
    DB: Backend, 

fn walk_ast(&self, out: AstPass<DB>) -> QueryResult<()>

fn to_sql(&self, out: &mut DB::QueryBuilder) -> QueryResult<()>

fn collect_binds(
    &self,
    out: &mut DB::BindCollector,
    metadata_lookup: &DB::MetadataLookup
) -> QueryResult<()>

fn is_safe_to_cache_prepared(&self) -> QueryResult<bool>

impl<T> SortExpressionMethods for Desc<T>

fn nulls_first(self) -> NullsFirst<Self>

Specify that nulls should come before other values in this ordering. Normally, nulls come last when sorting in ascending order and first when sorting in descending order.

fn nulls_last(self) -> NullsLast<Self>

Specify that nulls should come after other values in this ordering. Normally, nulls come last when sorting in ascending order and first when sorting in descending order.