Struct Parameters

pub struct Parameters { /* private fields */ }

Generator of PostgreSQL parameter placeholders for dynamic statements with multiple values

Example

use scooby::postgres::Parameters;

let mut params = Parameters::new();
let p1 = params.next();
let p2 = params.next();
let p345 = params.next_n(3);
let p67 = params.next_array::<2>();

assert_eq!(p1, "$1");
assert_eq!(p2, "$2");
assert_eq!(p345, "$3, $4, $5");
assert_eq!(p67, ["$6", "$7"]);

Implementations

impl Parameters

pub fn new() -> Parameters

Make a new Parameters counter, starting with 1

pub fn starting_from(first: usize) -> Parameters

Make a new Parameters counter, starting with passed number

pub fn next(&mut self) -> String

Return the current parameter placeholder in $x format, and increase the internal counter

pub fn next_n(&mut self, n: usize) -> String

Return N next placeholders in $x, $y, $z format

pub fn next_array<const N: usize>(&mut self) -> [String; N]

Return N next placeholders as an array of size N

Trait Implementations

impl Default for Parameters

fn default() -> Self

Returns the “default value” for a type.