How can I use Sequelize with TypeScript in a Node.js application?

How can I use Sequelize with TypeScript in a Node.js application?

To use Sequelize with TypeScript, first install the necessary packages: sequelize, @types/sequelize, and typescript. Then, set up your TypeScript configuration.

What are the benefits of using TypeScript with Sequelize?

Using TypeScript with Sequelize provides type safety, better autocompletion, and improved code maintainability.

Can you show me a simple example of a model definition?

Sure! Here's a basic example:

import { Model, DataTypes } from 'sequelize';
import { sequelize } from './database';

class User extends Model {
  public id!: number;
  public name!: string;
  public email!: string;
}

User.init({
  id: {
    type: DataTypes.INTEGER,
    autoIncrement: true,
    primaryKey: true,
  },
  name: {
    type: DataTypes.STRING,
    allowNull: false,
  },
  email: {
    type: DataTypes.STRING,
    allowNull: false,
    unique: true,
  },
}, {
  sequelize,
  modelName: 'User',
});

How do I connect to a database using Sequelize?

You can connect to a database by creating a new Sequelize instance with your database credentials:

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