Implementing model synchronization on server initialization with Next.js and sequelize

When it comes to using Express with React on the backend, I'm accustomed to working in a server.js file to synchronize the database. However, I've recently started working with Next.js and noticed that there's no server.js file to sync the models with sequelize. Currently, my workaround involves syncing the models upon user login/sign up (as seen in the code below), but I anticipate that this approach will lead to numerous issues in the future. What is the best way to organize my files and sync the models when starting up a Next.js server?

This is how I've structured my backend so far:

./src/pages/api/user/login.js

const { User } = require('../../../db/model');
const { signToken } = require('../../../auth/auth');
const sequelize = require('../../../db/config/connections');
sequelize.sync({ force: false });

export default async function handler(req, res) {
    // Code for handling POST requests goes here
}

./src/db/model/user.js

const { Model, DataTypes } = require("sequelize");
const sequelize = require("../config/connections");
const bcrypt = require("bcrypt");

// Code for defining the User model goes here

./src/db/config/connections.js

require("dotenv").config();
const Sequelize = require("sequelize");

// Code for establishing the database connection goes here

While the tables are currently able to sync, my goal is to have them synced automatically when the server starts up.

Answer №1

I encountered the same issue

My solution was to handle everything using CLI commands

Here is the step-by-step process I followed:

1- Execute >

npx sequelize-cli migration:generate --name first-setup
to create a skeleton for the initial migration

2- Add

dbConfig.sequelize.sync({ force: true });
inside the up method

https://i.sstatic.net/ZXAlN.png

3- Run > npx sequelize-cli db:migrate

4- Run >

npx sequelize-cli seed:generate --name first-seed
to generate a skeleton for the first seed data

5- Populate the seeding script with your specific logic

6- Execute

npx sequelize db:seed --seed [...seedName].js --debug

Note: For more detailed information on Sequelize CLI migrations and seeding,

Take a look at: https://sequelize.org/docs/v6/other-topics/migrations/

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