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

Migrating schematic changes and data from Sequelize to the database

We have defined our database’s schema with the generated files from the command-line tool, and we are now ready to migrate those definitions to our DBMS. Using Sequelize’s migrations can help teams of developers maintain the same schema structure across multiple machines. Migrations can provide a historical reference as to how your database has changed over time, which can also help us undo certain changes and revert our database’s schema to a specific time.

Migrating schematic changes

The Sequelize CLI provides a convenient way of propagating updates toward a database. All of our schematic changes will be located within the migrations directory, and all of our data seeds will be located within the seeders directory. This chapter will cover only the initialization of the database’s structure. In subsequent chapters, there will be examples of adding and removing columns (or indices...