Here are a couple of libraries that aim for the same goal (single-table DynamoDB usage):

- https://github.com/jeremydaly/dynamodb-toolbox

- https://github.com/jeffreyyoung/single-table-dynamo

- https://github.com/JasonCraftsCode/dynamodb-datamodel

- https://github.com/ginger-io/beyonce

I would be interested in a comparison.