Struct ExactlyOne 

pub struct ExactlyOne;

The query always returns one row, so .get() returns it as R.

Trait Implementations

impl Clone for ExactlyOne

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ExactlyOne

impl Debug for ExactlyOne

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ExactlyOne

fn default() -> Self

Returns the “default value” for a type.

impl RowCount for ExactlyOne

type Get<R> = R

What .get() returns for rows of type R.

fn first<R>(row: Option<R>) -> Result<R, DrizzleError>

The first row of a result as Self::Get.