Node lambda not writing to DynamoDB and no error

Question

var ddb = new AWS.DynamoDB({apiVersion: '2012-08-10'})
AWS.config.update({region: 'eu-west-1'})
var docClient = new AWS.DynamoDB.DocumentClient()
  const params = {
    TableName: 'TC_QUESTIONS',
    Item: {
      'questionId' : {S: '001'},
      'questionText' : {S: 'Richard Roe'}
    }
  }

  var putItemPromise = docClient.put(params).promise()
  putItemPromise.then(function(data) {
    console.log("Added item:", JSON.stringify(data, null, 2));
  }).catch(function(err) {
    console.error("Unable to add item. Error JSON:", JSON.stringify(err, null, 2));
  });

  await putItemPromise

No error is returned. No success callback. When I use the wrong column name I get an error back from Dynamo. I've tried running the it locally and on lambda. It executes, and exits. No rows get added to the Table. What am I doing wrong?

Edit: Here is my CF for the DynamoDB table:

QuestionsTable:
  Type: AWS::DynamoDB::Table
  Properties:
    TableName: 'TC_QUESTIONS'
    AttributeDefinitions:
      - AttributeName: questionId
        AttributeType: S
      - AttributeName: questionText
        AttributeType: S
    KeySchema:
      - AttributeName: questionId
        KeyType: HASH
      - AttributeName: questionText
        KeyType: RANGE
    ProvisionedThroughput: 
      ReadCapacityUnits: "5"
      WriteCapacityUnits: "5"

Answer 1

'use strict';
const AWS = require('aws-sdk');
const docClient = new AWS.DynamoDB.DocumentClient({region: 'eu-west-1'});

exports.handler = async (event) => {

    const params = {
      TableName: 'TC_QUESTIONS',
      Item: {
        'questionId': '001',
        'questionText' : 'Richard Roe'
      }
    }
  
    try {
      await docClient.put(params).promise()
    } catch (e) {
      console.log(e.message)
    }
};

If your table exists and questionId is your partition key, the code above works.

I think you were mixing things up a little bit, because since you're using DocClient you don't need to specify DynamoDB's types. This was the problem on your code. Just specify the raw values (like I did above, passing the String itself) and it will work.