title: DynamoDb Nested Map Update
body: <p>After working a bit with DynamoDb I’ve run into an issue that from what I’ve read so far is not really ideal for DynamoDb. So before I make the switch to RDS, I’d like to see if there’s anyway I can achieve what I need with DynamoDb. I’ve also thought about breaking this out into multiple tables for DynamoDb</p>
  <p>Below of my Data schema. There is a list nested inside the item. I need to be able to append strings to the list.</p>
  <pre><code>{
      “server-id”: “123345678”,
      “server-name”: “my-server”
      “topics”: [
          {
              “name”: “my-topic”,
              “subscribers”: [] //This is what I need to append
          }
       ]
  }
  </code></pre>