Struct Assign

pub struct Assign { /* private fields */ }

Represents assigning a value of an attribute, list, or map for a DynamoDB update expression.

Prefer Path::set over this.

Implementations

impl Assign

pub fn new<P, V>(path: P, value: V) -> Self

where P: Into<Path>, V: Into<Value>,

Allows for manual creation of an Assign statement.

Prefer Path::set over this.

pub fn and<T>(self, other: T) -> Update

where T: Into<Update>,

Add an additional Update to this expression.

use dynamodb_expression::{Num, Path};

let set = "foo"
    .parse::<Path>()?
    .set(Num::new(7))
    .and("bar".parse::<Path>()?.set("a value"))
    .and("baz".parse::<Path>()?.remove());
assert_eq!(r#"SET foo = 7, bar = "a value" REMOVE baz"#, set.to_string());

Trait Implementations

impl Clone for Assign

fn clone(&self) -> Assign

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Assign

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

Formats the value using the given formatter.

impl Display for Assign

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

Formats the value using the given formatter.

impl From<Assign> for SetAction

fn from(assign: Assign) -> Self

Converts to this type from the input type.

impl From<Assign> for Update

fn from(value: Assign) -> Self

Converts to this type from the input type.

impl PartialEq for Assign

fn eq(&self, other: &Assign) -> 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 Assign

impl StructuralPartialEq for Assign