Aws-sdk-js: Parse DynamoDB Stream events?

[marckaraujo]

Hey

Is there a way to parse DynamoDB Stream events using the SDK? I receive a JSON from a DynamoDB stream in a process, and I would like to parse the NewImage into a "normal" hash, without the types S, M etc as root keys.

The JSON I receive:

{
  "eventID":"",
  "eventName":"MODIFY",
  "eventVersion":"1.1",
  "eventSource":"aws:dynamodb",
  "awsRegion":"us-east-1",
  "dynamodb":{
    "ApproximateCreationDateTime":123,
    "Keys":{
      "object_id":{
        "S":"123"
      }
    },
    "NewImage":{
      "name":{
        "S":"NAME"
      },
      "hash_value":{
        "M":{
          "sub_hash_value":{
            "M":{
              "second_name":{
                "S":"name"
              },

And I would like to parse the NewImage to:

{ 
  "object_id": "123", 
  "name": "name", 
  "hash_value": { 
    "sub_hash_value":  { "second_name": "name" } 
  }
}

Is there any helper in the SDK that parses it?

[jeskew]

Hi @marckaraujo,

A PR exposing the DynamoDB DocumentClient's converter has been merged to master and will go out with the next release. To convert the "NewImage" hash in the JSON snippet above to the expected output, you would call AWS.DynamoDB.Converter.output(newImageObject) where newImageObject represents the JSON you receive.

Please feel free to reopen if you have any questions or concerns.

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