Sequelize One-To-One association – NodeJS/Express, MySQL

Sequelize

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node

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express

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Mysql

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loveprogramming viết ngày 02/05/2021

https://grokonez.com/node-js/sequelize-one-to-one-association-nodejs-express-mysql

Sequelize One-To-One association – NodeJS/Express, MySQL

In the post, we got started with Sequelize ORM. Today we're gonna create Sequelize One-To-One association models with NodeJS/Express, MySQL.

Related posts:

• Sequelize ORM – Build CRUD RestAPIs with NodeJs/Express, Sequelize, MySQL
• Sequelize One-To-Many association – NodeJS/Express, MySQL
• Sequelize Many-to-Many association – NodeJS/Express, MySQL

Sequelize One-to-One association

Note: When calling a method such as Customer.hasOne(Address), we say that the Customer model is the source and the Address model is the target.

We define 2 models:

Customer = sequelize.define('customer', {
  /* attributes */
});

Address = sequelize.define('address', {
    /* attributes */
});

How to create One-to-One association between them?
-> Sequelize provides 2 ways:

• belongsTo

Address.belongsTo(Customer); // Will add a customerId attribute to Address to hold the primary key value for Customer.

• hasOne

More at:
https://grokonez.com/node-js/sequelize-one-to-one-association-nodejs-express-mysql

Sequelize One-To-One association – NodeJS/Express, MySQL