[FEATURE] When dynamoose.transaction throws a transaction cancelled exception, include the reasons for cancellation

[KennethWKZ]

Summary:

When Dynamo throws a transaction cancelled exception, its HTTP response body includes a list of reasons for cancellation. But the error thrown from the sdk's Promise object does not include these reasons.

So, per: aws/aws-sdk-js#2464 (comment) -- we have to parse them out.

Code sample:

General

This is the exmaple of dynamoose.transaction exception of any type of errors:

{
    "innerData": {
        "message": "Transaction cancelled, please refer cancellation reasons for specific reasons [None, ConditionalCheckFailed]",
        "code": "TransactionCanceledException",
        "time": "2021-05-03T01:28:22.914Z",
        "requestId": "E665JME5VFHQK418R949R7QH97VV4KQNSO5AEMVJF66Q9ASUAAJG",
        "statusCode": 400,
        "retryable": false,
        "retryDelay": 38.27170776979997
    },
    "innerStackTrace": "TransactionCanceledException: Transaction cancelled, please refer cancellation reasons for specific reasons [None, ConditionalCheckFailed]\n    at Request.extractError (/var/task/node_modules/dynamoose/node_modules/aws-sdk/lib/protocol/json.js:52:27)\n    at Request.callListeners (/var/task/node_modules/dynamoose/node_modules/aws-sdk/lib/sequential_executor.js:106:20)\n    at Request.emit (/var/task/node_modules/dynamoose/node_modules/aws-sdk/lib/sequential_executor.js:78:10)\n    at Request.emit (/var/task/node_modules/dynamoose/node_modules/aws-sdk/lib/request.js:688:14)\n    at Request.transition (/var/task/node_modules/dynamoose/node_modules/aws-sdk/lib/request.js:22:10)\n    at AcceptorStateMachine.runTo (/var/task/node_modules/dynamoose/node_modules/aws-sdk/lib/state_machine.js:14:12)\n    at /var/task/node_modules/dynamoose/node_modules/aws-sdk/lib/state_machine.js:26:10\n    at Request.<anonymous> (/var/task/node_modules/dynamoose/node_modules/aws-sdk/lib/request.js:38:9)\n    at Request.<anonymous> (/var/task/node_modules/dynamoose/node_modules/aws-sdk/lib/request.js:690:12)\n    at Request.callListeners (/var/task/node_modules/dynamoose/node_modules/aws-sdk/lib/sequential_executor.js:116:18)"
}

The current solution: example of code

Environment:

Operating System: Ubuntu Operating System Version: 20.04.2 Node.js version (node -v): 14.16.0 NPM version: (npm -v): 7.9.0 Dynamoose version: 2.7.3

Other information (if applicable):

Other:

• [x] I have read through the Dynamoose documentation before posting this issue
• [x] I have searched through the GitHub issues (including closed issues) and pull requests to ensure this feature has not already been suggested before
• [x] I have filled out all fields above
• [x] I am running the latest version of Dynamoose