AWS SDK for JavaScript/Node.js in DynamoDB - Mini Project: Build & Apply

Basic DynamoDB Table Interaction with AWS SDK for JavaScript/Node.js

📖 Scenario: You are building a simple Node.js application that interacts with an AWS DynamoDB table to store and retrieve product information.

🎯 Goal: Learn how to set up a DynamoDB client, prepare data, and perform basic operations like putting an item and scanning the table using the AWS SDK for JavaScript.

📋 What You'll Learn

Create a JavaScript object representing a product with specific attributes.

Configure the DynamoDB client with the AWS SDK.

Write code to put the product item into the DynamoDB table.

Write code to scan the DynamoDB table to retrieve all items.

💡 Why This Matters

🌍 Real World

This project simulates a common task in cloud applications: storing and retrieving data from a managed NoSQL database service like DynamoDB.

💼 Career

Understanding how to use AWS SDK for JavaScript to interact with DynamoDB is essential for backend developers working with AWS cloud infrastructure.

1

Create a product object

Create a JavaScript constant called product with these exact key-value pairs: id set to "101", name set to "Notebook", and price set to 9.99.

DynamoDB

# Create a constant called product with id, name, and price
// Your code here

Need a hint?

Use const product = { id: "101", name: "Notebook", price: 9.99 };

2

Configure DynamoDB client

Import DynamoDBClient from @aws-sdk/client-dynamodb and create a constant called client that initializes DynamoDBClient with the region set to "us-east-1".

DynamoDB

const product = { id: "101", name: "Notebook", price: 9.99 };
// Import DynamoDBClient and create client with region us-east-1
// Your code here

Need a hint?

Use import { DynamoDBClient } from "@aws-sdk/client-dynamodb"; and const client = new DynamoDBClient({ region: "us-east-1" });

3

Put the product item into DynamoDB

Import PutItemCommand from @aws-sdk/client-dynamodb. Create a constant called putParams with TableName set to "Products" and Item mapping id, name, and price to DynamoDB attribute types (S for strings, N for numbers as strings). Then create a constant called putCommand using PutItemCommand with putParams.

DynamoDB

const product = { id: "101", name: "Notebook", price: 9.99 };

import { DynamoDBClient, PutItemCommand } from "@aws-sdk/client-dynamodb";

const client = new DynamoDBClient({ region: "us-east-1" });

// Create putParams with TableName 'Products' and Item mapping product keys to DynamoDB types
// Create putCommand using PutItemCommand with putParams
// Your code here

Need a hint?

Remember to convert the number price to string for DynamoDB number type.

4

Scan the DynamoDB table

Import ScanCommand from @aws-sdk/client-dynamodb. Create a constant called scanParams with TableName set to "Products". Then create a constant called scanCommand using ScanCommand with scanParams.

DynamoDB

const product = { id: "101", name: "Notebook", price: 9.99 };

import { DynamoDBClient, PutItemCommand, ScanCommand } from "@aws-sdk/client-dynamodb";

const client = new DynamoDBClient({ region: "us-east-1" });

const putParams = {
  TableName: "Products",
  Item: {
    id: { S: product.id },
    name: { S: product.name },
    price: { N: product.price.toString() }
  }
};

const putCommand = new PutItemCommand(putParams);

// Create scanParams with TableName 'Products'
// Create scanCommand using ScanCommand with scanParams
// Your code here

Need a hint?

Use ScanCommand with the table name to get all items.