pub struct now;
Expand description
Represents the SQL CURRENT_TIMESTAMP
constant. This is equivalent to the
NOW()
function on backends that support it.
Trait Implementations§
source§impl AsExpression<Nullable<Timestamp>> for now
impl AsExpression<Nullable<Timestamp>> for now
source§fn as_expression(self) -> Self::Expression
fn as_expression(self) -> Self::Expression
Perform the conversion
source§impl AsExpression<Nullable<Timestamptz>> for now
impl AsExpression<Nullable<Timestamptz>> for now
source§type Expression = Coerce<now, Nullable<Timestamptz>>
type Expression = Coerce<now, Nullable<Timestamptz>>
The expression being returned
source§fn as_expression(self) -> Self::Expression
fn as_expression(self) -> Self::Expression
Perform the conversion
source§impl AsExpression<Timestamptz> for now
impl AsExpression<Timestamptz> for now
source§type Expression = Coerce<now, Timestamptz>
type Expression = Coerce<now, Timestamptz>
The expression being returned
source§fn as_expression(self) -> Self::Expression
fn as_expression(self) -> Self::Expression
Perform the conversion
source§impl Expression for now
impl Expression for now
source§impl<DB: Backend> QueryFragment<DB> for now
impl<DB: Backend> QueryFragment<DB> for now
source§impl QueryId for now
impl QueryId for now
source§const HAS_STATIC_QUERY_ID: bool = true
const HAS_STATIC_QUERY_ID: bool = true
Can the SQL generated by
Self
be uniquely identified by its type? Read moresource§impl<__GroupByClause> ValidGrouping<__GroupByClause> for now
impl<__GroupByClause> ValidGrouping<__GroupByClause> for now
source§type IsAggregate = Never
type IsAggregate = Never
Is this expression aggregate? Read more
impl<QS> AppearsOnTable<QS> for nowwhere
now: Expression,
impl Copy for now
impl<QS> SelectableExpression<QS> for nowwhere
now: AppearsOnTable<QS>,
Auto Trait Implementations§
impl Freeze for now
impl RefUnwindSafe for now
impl Send for now
impl Sync for now
impl Unpin for now
impl UnwindSafe for now
Blanket Implementations§
source§impl<T, ST> AsExpression<ST> for T
impl<T, ST> AsExpression<ST> for T
source§type Expression = T
type Expression = T
The expression being returned
source§fn as_expression(self) -> T
fn as_expression(self) -> T
Perform the conversion
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
🔬This is a nightly-only experimental API. (
clone_to_uninit
)source§impl<Conn, DB, T> ExecuteDsl<Conn, DB> for T
impl<Conn, DB, T> ExecuteDsl<Conn, DB> for T
source§impl<T> ExpressionMethods for T
impl<T> ExpressionMethods for T
source§fn is_not_null(self) -> IsNotNull<Self>
fn is_not_null(self) -> IsNotNull<Self>
Creates a SQL
IS NOT NULL
expression. Read moresource§fn between<T, U>(self, lower: T, upper: U) -> Between<Self, T, U>
fn between<T, U>(self, lower: T, upper: U) -> Between<Self, T, U>
Creates a SQL
BETWEEN
expression using the given lower and upper
bounds. Read moresource§fn not_between<T, U>(self, lower: T, upper: U) -> NotBetween<Self, T, U>
fn not_between<T, U>(self, lower: T, upper: U) -> NotBetween<Self, T, U>
Creates a SQL
NOT BETWEEN
expression using the given lower and upper
bounds. Read moresource§impl<T> IntoSql for T
impl<T> IntoSql for T
source§impl<T> NullableExpressionMethods for Twhere
T: Expression,
impl<T> NullableExpressionMethods for Twhere
T: Expression,
source§fn nullable(self) -> Nullable<Self>
fn nullable(self) -> Nullable<Self>
Converts this potentially non-null expression into one which is treated
as nullable. This method has no impact on the generated SQL, and is only
used to allow certain comparisons that would otherwise fail to compile. Read more
source§fn assume_not_null(self) -> AssumeNotNull<Self>
fn assume_not_null(self) -> AssumeNotNull<Self>
Converts this potentially nullable expression into one which will be assumed
to be not-null. This method has no impact on the generated SQL, however it will
enable you to attempt deserialization of the returned value in a non-
Option
. Read more