Struct redis_driver::ZAdd

pub struct ZAdd<'a, T>where
    T: SortedSetCommands + ?Sized,{ /* private fields */ }

Implementations

impl<'a, T> ZAdd<'a, T>where
    T: SortedSetCommands + ?Sized,

pub fn execute<M, I>(
    self,
    items: I
) -> Pin<Box<dyn Future<Output = Result<usize>> + 'a>>where
    M: Into<BulkString>,
    I: ArgsOrCollection<(f64, M)>,

Return

• When used without optional arguments, the number of elements added to the sorted set (excluding score updates).
• If the CH option is specified, the number of elements that were changed (added or updated).

pub fn nx(self) -> Self

Only update elements that already exist. Don’t add new elements.

pub fn xx(self) -> Self

Only add new elements. Don’t update already existing elements.

pub fn lt(self) -> Self

Only update existing elements if the new score is less than the current score.

This flag doesn’t prevent adding new elements.

pub fn gt(self) -> Self

Only update existing elements if the new score is greater than the current score.

This flag doesn’t prevent adding new elements.

pub fn ch(self) -> Self

Modify the return value from the number of new elements added, to the total number of elements changed (CH is an abbreviation of changed).

pub fn incr<M>(
    self,
    score: f64,
    member: M
) -> Pin<Box<dyn Future<Output = Result<Option<f64>>> + 'a>>where
    M: Into<BulkString>,

When this option is specified ZADD acts like ZINCRBY. Only one score-element pair can be specified in this mode.

Return

The new score of member (a double precision floating point number), or nil if the operation was aborted (when called with either the XX or the NX option).