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

Advanced Sequelize options for defining models

When defining a model, within Sequelize, the last input parameter for the init() and define() methods offers us a way to fine-tune our project’s requirements and Sequelize’s behavior. These parameter options are useful for situations such as when we need to construct Sequelize in a pre-existing environment that does not adhere to Sequelize’s naming conventions (for example, a column named PersonIsMIA as opposed to Sequelize’s "PersonIsMia" convention).

sequelize

A copy (or new) instance of Sequelize to associate with the model. Sequelize will return an error if this field is not provided (except when using the sequelize.define method). Useful for querying across data centers or even databases.

modelName

Explicitly defines the model’s name with a string. This would be the first parameter in Sequelize’s define() method. If you are using ES6 class definitions, the default for...