What are ORMs in Node.js and how do they help with data modeling?

What are ORMs in Node.js and how do they help with data modeling?

ORM stands for Object-Relational Mapping. In Node.js, ORMs like Sequelize or TypeORM allow developers to interact with databases using JavaScript objects instead of SQL queries, simplifying data modeling.

Can you give me an example of how to define a model using Sequelize?

Sure! Here's a simple example:

const { Model, DataTypes } = require('sequelize');
const sequelize = new Sequelize('database', 'username', 'password', {
  host: 'localhost',
  dialect: 'mysql'
});

class User extends Model {}
User.init({
  username: DataTypes.STRING,
  password: DataTypes.STRING,
}, { sequelize, modelName: 'user' });

What are the benefits of using an ORM over raw SQL?

Using an ORM can improve productivity by reducing boilerplate code, enhance maintainability with a clear structure, and provide database abstraction, making it easier to switch databases without changing much code.