title: AWS lamba function with DynamoDb. New image of item does not contain all fields
body: <p>I am using AWS lambda function with DynamoDb. When I edit an item in dynamodb table, the lambda function is triggered. </p>
  
  <p>When I receive the new image of the item with the event inside my lambda function, some of the fields are not present in the new image dict. I only get 3 fields, whereas my dynamodb table contains 6 fields. Why so?</p>