UUIDs for DynamoDB?

Question

Is it possible to get DynamoDB to automatically generate unique IDs when adding new items to a table?

I noticed the Java API mentions @DynamoDBAutoGeneratedKey so I\

Answer 1

By using schema based AWS dynamodb data mapper library in Node.js, Hash key (id) will be generated automatically. Auto generated ids are based on uuid v4.

For more details, have a look on following aws package.

Data Mapper with annotation

Data Mapper package for Javascript

Sample snipet

@table('my_table')
class MyDomainClass {
    @autoGeneratedHashKey()
    id: string;

    @rangeKey({defaultProvider: () => new Date()})
    createdAt: Date;
}