Struct dynamodb_expression::update::set::if_not_exists::Builder

pub struct Builder { /* private fields */ }

Builds an IfNotExists instance. Create an instance of this by using IfNotExists::builder.

See also: Path::if_not_exists

Implementations

impl Builder

pub fn src<T>(self, src: T) -> Selfwhere T: Into<Path>,

Sets the source Path to check for existence.

Defaults to the destination Path.

let if_not_exists = Path::new_name("foo")
    .if_not_exists()
    .src(Path::new_name("bar"))
    .assign(Num::new(42));
assert_eq!("foo = if_not_exists(bar, 42)", if_not_exists.to_string());

Compare with the default, where the destination Path is used:

let if_not_exists = Path::new_name("foo")
    .if_not_exists()
    .assign(Num::new(42));
assert_eq!("foo = if_not_exists(foo, 42)", if_not_exists.to_string());

pub fn assign<T>(self, value: T) -> IfNotExistswhere T: Into<Value>,

The value to conditionally set.

Consumes this Builder and creates an IfNotExists instance.

See also: Path::if_not_exists

Trait Implementations

impl Clone for Builder

fn clone(&self) -> Builder

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Builder

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

Formats the value using the given formatter.