Struct KeyCondition

pub struct KeyCondition { /* private fields */ }

Represents a DynamoDB key condition expression. Build an instance from the methods on Key.

See also: Path::key, expression::Builder::with_key_condition

use dynamodb_expression::{Expression, Num, Path};

let key_condition = "id"
    .parse::<Path>()?
    .key()
    .equal(Num::new(42))
    .and("category".parse::<Path>()?.key().begins_with("hardware."));

let expression = Expression::builder().with_key_condition(key_condition).build();

Implementations

impl KeyCondition

pub fn and(self, right: Self) -> Self

Combine two KeyConditions with the AND operator.

use dynamodb_expression::{Num, Path};

let key_condition = "id"
    .parse::<Path>()?
    .key()
    .equal(Num::new(42))
    .and("category".parse::<Path>()?.key().begins_with("hardware."));
assert_eq!(r#"id = 42 AND begins_with(category, "hardware.")"#, key_condition.to_string());

Trait Implementations

impl Clone for KeyCondition

fn clone(&self) -> KeyCondition

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for KeyCondition

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

Formats the value using the given formatter.

impl Display for KeyCondition

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

Formats the value using the given formatter.

impl From<KeyCondition> for String

fn from(key_condition: KeyCondition) -> Self

Converts to this type from the input type.

impl PartialEq for KeyCondition

fn eq(&self, other: &KeyCondition) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for KeyCondition

impl StructuralPartialEq for KeyCondition