Introduction

Environment Setup

Install Nodejs

Create Project

Install Packages

npm install sequelize
npm install express
npm install nodemon

Create a Simple Express Server

This is the simple express application.

import app from "./src/app";
const port = 8000;
app.get("/api", (req, res) => {
  res.send("App is running");
});
app.listen(port, () => {
  console.log(`Server is running on http://localhost:${port}`);
});

Folder Structure & File Structure

Server.ts

import app from "./src/app";

const port = 8000;

app.get("/api", (req, res) => {
  res.send("App is running");
});

app.listen(port, () => {
  console.log(`Server is running on http://localhost:${port}`);
});

App.ts

import express from "express";
import routes from "./routes";
import cors from 'cors';
class App {
  myLogger(req, res, next) {
    console.log("LOGGED");
    next();
  }
  app = express();
  constructor() {
    this.app.use(express.json());
    this.app.use(this.myLogger);
    this.app.use(cors());
    this.app.use("/api", routes);
  }
}

export default new App().app;

Routes.ts

import express from "express";

import scanRoutes from "./scans/scanRoute";
class Routes {
  routes = express.Router();
  constructor() {
    this.routes.use("/", scanRoutes);
  }
}
export default new Routes().routes;

db.ts

import { Sequelize } from "sequelize";

const sequelize = new Sequelize("rapdb", "appdev", "dev123", {
  host: "localhost",
  dialect: "mysql",
  logging: false,
});

Check the connections

async function connect() {
  try {
    await sequelize.authenticate();
    console.log("Connection has been established successfully.");
  } catch (error) {
    console.error("Unable to connect to the database:", error);
  }
}

const synDb = () => {
  connect();
  sequelize
    .sync()
    .then(() => {
      console.log("Scan table created successfully!");
    })
    .catch((error) => {
      console.error("Unable to create table : ", error);
    });
};

to call execute function

synDb();

export default sequelize;