Book Image

Supercharging Node.js Applications with Sequelize

By : Daniel Durante
4 (1)
Book Image

Supercharging Node.js Applications with Sequelize

4 (1)
By: Daniel Durante

Overview of this book

Continuous changes in business requirements can make it difficult for programmers to organize business logic into database models, which turns out to be an expensive operation as changes to the database may result in errors and incongruity within applications. Supercharging Node.js Applications with Sequelize helps you get to grips with Sequelize, a reliable ORM that enables you to alleviate these issues in your database and applications. With Sequelize, you'll no longer need to store information in flat files or memory. This book takes a hands-on approach to implementation and associated methodologies for your database that will have you up and running in no time. You'll learn how to configure Sequelize for your Node.js application properly, develop a better sense of understanding of how this ORM works, and find out how to manage your database from Node.js using Sequelize. Finally, you'll be able to use Sequelize as the database driver for building your application from scratch. By the end of this Node.js book, you'll be able to configure, build, store, retrieve, validate, and associate your data from a database to a Node.js application.
Table of Contents (16 chapters)
1
Part 1 – Installation, Configuration, and the Basics
4
Part 2 – Validating, Customizing, and Associating Your Data
10
Part 3 – Advanced Queries, Using Adapters, and Logging Queries

Creating our own adapter

Sequelize is fairly extensible through its class properties, lifecycle events, and configurations. For the example of creating our own adapter for Sequelize, we will integrate a new data type that will automatically convert values, using a specific set of rules, to what is called a “slug URL.” A slug URL usually consists of hyphens instead of spaces, lowercase lettering, and removes all special characters.

Let’s look at the steps to create our adapter:

  1. We’ll begin by installing any necessary packages. Keeping a copy of a character map of special characters can be a daunting task, so we will use an npm package called, github-slugger to help us:
    npm i --save github-slugger
  2. Next, we will want to create a couple of directories and a file with plugins/slug/index.js as the path from the project’s root directory. Before we can begin coding within that file, we will need to add the slug column to a table within the...