Struct LposOptions

pub struct LposOptions { /* private fields */ }

Options for the LPOS command

Example

use redis::{Commands, RedisResult, LposOptions};
fn fetch_list_position(
    con: &mut redis::Connection,
    key: &str,
    value: &str,
    count: usize,
    rank: isize,
    maxlen: usize,
) -> RedisResult<Vec<usize>> {
    let opts = LposOptions::default()
        .count(count)
        .rank(rank)
        .maxlen(maxlen);
    con.lpos(key, value, opts)
}

Implementations

impl LposOptions

pub fn count(self, n: usize) -> Self

Limit the results to the first N matching items.

pub fn rank(self, n: isize) -> Self

Return the value of N from the matching items.

pub fn maxlen(self, n: usize) -> Self

Limit the search to N items in the list.

Trait Implementations

impl Default for LposOptions

fn default() -> LposOptions

Returns the “default value” for a type.

impl ToRedisArgs for LposOptions

fn write_redis_args<W>(&self, out: &mut W)

where W: ?Sized + RedisWrite,

This writes the value into a vector of bytes. Each item is a single argument. Most items generate a single item.

fn num_of_args(&self) -> usize

Returns the number of arguments this value will generate.

fn to_redis_args(&self) -> Vec<Vec<u8>>

This converts the value into a vector of bytes. Each item is a single argument. Most items generate a vector of a single item.

fn describe_numeric_behavior(&self) -> NumericBehavior

Returns an information about the contained value with regards to it’s numeric behavior in a redis context. This is used in some high level concepts to switch between different implementations of redis functions (for instance INCR vs INCRBYFLOAT).