Conditionally adding values to DynamoDB PutRequest item

[mblarsen]

DynamoDB's PutRequst has a fluid builder API. In fact using the builder is the only way to create a PutRequest since the struct is marked as #[non_exhaustive].

How is one supposed to conditionally add key value pairs to the item HashMap?

The builder's item(..) method uses self so this pattern is not possible:

let put_request = PutRequest::builder()
  .item("id".to_owned(), AttributeValue::S("foo"));

if let Some(value) = maybe_value {
  put_request.item("value".to_owned(), AttributeValue::S(value));
}

Also there seem not way that you create a PutRequest from an existing HashMap.

Any ideas?

[mblarsen]

Doh moment

let mut put_request = PutRequest::builder()
  .item("id".to_owned(), AttributeValue::S("foo"));

if let Some(value) = maybe_value {
  put_request = put_request.item("value".to_owned(), AttributeValue::S(value));
}

[github-actions[bot]]

Hello! Reopening this discussion to make it searchable.