robzhu

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "execute-api:ManageConnections"
            ],
            "Resource": "*"
        }

robzhu

export function fromArrayToSet(values: string[]) {
  if (!values || values.length === 0) {
    throw Error('Cannot convert empty array into a set');
  }
  return DynamoDB.createSet(values);
}

robzhu

// credentials are stored in a .env file with the following contents:
//
// accessKeyId=
// secretAccessKey=
// region=
// tableName=

// See: https://github.com/motdotla/dotenv
require("dotenv").config();

robzhu

async function deleteFriendByValue(friendName: string) {
  const Key = { id: "1234" };
  // Delete the value from the set. This operation is idempotent and will not
  // produce an error if the value(s) are missing.
  const { err, data } = await updateWithErrorWrapper({
    TableName,
    Key,
    UpdateExpression: `DELETE friends :valuesToRemove`,
    ExpressionAttributeValues: {
      ":valuesToRemove": DynamoDB.createSet([friendName])

robzhu

// credentials are stored in a .env file with the following contents:
//
// accessKeyId=
// secretAccessKey=
// region=
// tableName=

// See: https://github.com/motdotla/dotenv
require("dotenv").config();

robzhu

function toArrayfromSet(set) {
  if (!set) return [];
  if (Array.isArray(set)) return set;
  
  return Array.isArray(set.values) ? set.values : [];
}

robzhu

const result = await DynamoDB.get({
   TableName,
   Key: { id: "1234" }
 }).promise();
 console.log(result.Item.friends);
 console.log(Array.isArray(result.Item.friends.values));

// Output:
Set {
  wrapperName: 'Set',

robzhu

async function deleteFriendByValue(friendName) {
  const Key = { id: "1234" };
  
  // fetch the document
  let result = await DynamoDB.get({
    TableName,
    Key
  }).promise();
  
  // Delete the value from the set. This operation is idempotent and will not produce an error if the value(s) are missing.

robzhu

import * as AWS from "aws-sdk";
const DynamoDB = new AWS.DynamoDB.DocumentClient();

DynamoDB.put({
  TableName,
  Item: {
    id: "1234",
    name: "carl",
    friends: DynamoDB.createSet(["meatwad", "frylock", "shake"])
  }

robzhu

async function conditionalVersionRemoveFriendByValue(friendName) {
  const Key = { id: "1234" };
  
  // fetch the document
  const document = (await DynamoDB.get({
    TableName,
    Key
  }).promise()).Item;
  
  // find the index