Trait IntoRowCount 

pub trait IntoRowCount {
    // Required method
    fn into_row_count(self) -> RowCount;
}

A number of rows — what a LIMIT and an OFFSET each are: an integer, or a prepare!{} placeholder for one, so a paginated endpoint can prepare its query once and vary the page. A trait rather than Into<i64> so a usize page size — the shape a paginated handler already has — goes in without a cast. Every numeric impl lands in 0..=i64::MAX: a negative count is not a query any database will run, and a usize past i64::MAX is not a page anyone is asking for.

Required Methods

fn into_row_count(self) -> RowCount

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl IntoRowCount for i8

fn into_row_count(self) -> RowCount

impl IntoRowCount for i16

fn into_row_count(self) -> RowCount

impl IntoRowCount for i32

fn into_row_count(self) -> RowCount

impl IntoRowCount for i64

fn into_row_count(self) -> RowCount

impl IntoRowCount for isize

fn into_row_count(self) -> RowCount

impl IntoRowCount for u8

fn into_row_count(self) -> RowCount

impl IntoRowCount for u16

fn into_row_count(self) -> RowCount

impl IntoRowCount for u32

fn into_row_count(self) -> RowCount

impl IntoRowCount for u64

fn into_row_count(self) -> RowCount

impl IntoRowCount for usize

fn into_row_count(self) -> RowCount

Implementors

impl IntoRowCount for Expr<Nil, BigInt>

impl IntoRowCount for Expr<Nil, Integer>

A prepare!{} placeholder, or any other scope-free Expr of an integer type: bound rather than written, so one prepared query serves every page. Only the two integer types — a page is a number.