How to make a UUID in DynamoDB?

Question

In my db scheme, I need a autoincrement primary key. How I can realize this feature?

PS For access to DynamoDB, I use dynode, module for Node.js.

Answer 1

Incase you are using NoSQL DynamoDB then using Dynamoose ORM, you can easily set default unique id. Here is the simple user creation example

// User.modal.js

const dynamoose = require("dynamoose");

const userSchema = new dynamoose.Schema(
  {
    id: {
      type: String,
      hashKey: true,
    },
    displayName: String,
    firstName: String,
    lastName: String,
  },
  { timestamps: true },
);

const User = dynamoose.model("User", userSchema);

module.exports = User;

// User.controller.js

const { v4: uuidv4 } = require("uuid");    
const User = require("./user.model");

exports.create = async (req, res) => {
  const user = new User({ id: uuidv4(), ...req.body }); // set unique id
  const [err, response] = await to(user.save());
  if (err) {
    return badRes(res, err);
  }
  return goodRes(res, reponse);
};