Book Image

MongoDB Fundamentals

By : Amit Phaltankar, Juned Ahsan, Michael Harrison, Liviu Nedov
Book Image

MongoDB Fundamentals

By: Amit Phaltankar, Juned Ahsan, Michael Harrison, Liviu Nedov

Overview of this book

MongoDB is one of the most popular database technologies for handling large collections of data. This book will help MongoDB beginners develop the knowledge and skills to create databases and process data efficiently. Unlike other MongoDB books, MongoDB Fundamentals dives into cloud computing from the very start – showing you how to get started with Atlas in the first chapter. You will discover how to modify existing data, add new data into a database, and handle complex queries by creating aggregation pipelines. As you progress, you'll learn about the MongoDB replication architecture and configure a simple cluster. You will also get to grips with user authentication, as well as techniques for backing up and restoring data. Finally, you'll perform data visualization using MongoDB Charts. You will work on realistic projects that are presented as bitesize exercises and activities, allowing you to challenge yourself in an enjoyable and attainable way. Many of these mini-projects are based around a movie database case study, while the last chapter acts as a final project where you will use MongoDB to solve a real-world problem based on a bike-sharing app. By the end of this book, you'll have the skills and confidence to process large volumes of data and tackle your own projects using MongoDB.
Table of Contents (15 chapters)
Preface

2. Documents and Data Types

Activity 2.01: Modeling a Tweet into a JSON Document

Solution:

Perform the following steps to complete the activity:

  1. Identify and list the following fields from the tweet that can be included in the JSON document:
    creation date and time
    user id
    user name 
    user profile pic
    user verification status
    hash tags
    mentions
    tweet text
    likes
    comments
    retweets
  2. Group the related fields such that they can be placed as embedded objects or arrays. Since a tweet can have multiple hashtags and mentions, it can be represented as an array. The modified list appears as follows:
    creation date and time
    user 
      id
      name 
      profile pic
      verification status
    hash tags
      [tags]
    mentions
      [mentions]
    tweet text
    likes
    comments
    retweets
  3. Prepare the user object and add the values from the tweet:
    {
      "id": "Lord_Of_Winterfell",
      "name": "Office of Ned...