Struct dynamodb_expression::update::set::Set

pub struct Set { /* private fields */ }

Represents a SET statement for an update expression.

See also: Update

Examples

use dynamodb_expression::{update::Set, Path};

let set_foo = Set::from(Path::new_name("foo").math().add(7));
assert_eq!("SET foo = foo + 7", set_foo.to_string());

let set_bar = Set::from(Path::new_name("bar").if_not_exists().assign("a value"));
assert_eq!(r#"SET bar = if_not_exists(bar, "a value")"#, set_bar.to_string());

let set_foo_and_bar = set_foo.and(set_bar);
assert_eq!(
    r#"SET foo = foo + 7, bar = if_not_exists(bar, "a value")"#,
    set_foo_and_bar.to_string(),
);

Implementations

impl Set

pub fn and<T>(self, action: T) -> Selfwhere T: Into<Set>,

Add an additional action to this SET statement.

use dynamodb_expression::{Num, Path, update::Set};

let set = Set::from(Path::new_name("foo").assign(Num::new(7)))
    .and(Path::new_name("bar").assign("a value"));
assert_eq!(r#"SET foo = 7, bar = "a value""#, set.to_string());

Trait Implementations

impl Clone for Set

fn clone(&self) -> Set

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Set

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

Formats the value using the given formatter.

impl Display for Set

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

Formats the value using the given formatter.

impl From<Set> for Update

fn from(value: Set) -> Self

Converts to this type from the input type.

impl<T> From<T> for Setwhere T: Into<SetAction>,

fn from(value: T) -> Self

Converts to this type from the input type.

impl<T> FromIterator<T> for Setwhere T: Into<SetAction>,

fn from_iter<I>(iter: I) -> Selfwhere I: IntoIterator<Item = T>,

Creates a value from an iterator.

impl PartialEq for Set

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl Eq for Set

impl StructuralEq for Set

impl StructuralPartialEq for Set