Initial commit - Fastify backend with Sequelize and TypeScript

.gitignore

+# Node modules
+node_modules/
+
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# TypeScript
+dist/
+*.tsbuildinfo
+
+# Env files
+.env
+
+# IDEs
+.vscode/
+.idea/
+
+# OS-specific
+.DS_Store
+Thumbs.db

package.json

+{
+  "name": "backend",
+  "version": "1.0.0",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "dev": "ts-node-dev --respawn src/index.ts"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "description": "",
+  "devDependencies": {
+    "@types/node": "^22.15.3",
+    "ts-node-dev": "^2.0.0",
+    "typescript": "^5.8.3"
+  },
+  "dependencies": {
+    "fastify": "^5.3.2",
+    "fastify-cors": "^6.0.3",
+    "fastify-plugin": "^5.0.1",
+    "mysql2": "^3.14.1",
+    "pg-hstore": "^2.3.4",
+    "sequelize": "^6.37.7",
+    "sequelize-typescript": "^2.1.6",
+    "zod": "^3.24.4"
+  }
+}

src/index.ts

+import Fastify from 'fastify';
+import db from './plugins/db';
+import userRoutes from './routes/user';
+
+const app = Fastify();
+
+app.register(db);
+app.register(userRoutes, { prefix: '/api/users' });
+
+app.listen({ port: 3001 }, (err) => {
+  if (err) throw err;
+  console.log('Server running on http://localhost:3001');
+});

src/models/User.ts

+import { Table, Column, Model, DataType } from 'sequelize-typescript';
+
+@Table
+export class User extends Model {
+  @Column({
+    type: DataType.STRING,
+    allowNull: false,
+  })
+  name!: string;
+
+  @Column({
+    type: DataType.STRING,
+    allowNull: false,
+    unique: true,
+  })
+  email!: string;
+}

src/plugins/db.ts

+import { FastifyPluginAsync } from 'fastify';
+import { Sequelize } from 'sequelize-typescript';
+
+const dbPlugin: FastifyPluginAsync = async (fastify) => {
+  const sequelize = new Sequelize({
+    database: 'product_db',
+    username: 'root',
+    password: 'Faruskhan@985',
+    host: 'localhost',
+    dialect: 'mysql',
+    models: [__dirname + '/../models'], // Make sure this path is correct
+  });
+
+  try {
+    await sequelize.sync();
+    console.log('Sequelize connected successfully');
+
+    // Optionally attach sequelize instance to Fastify
+    fastify.decorate('sequelize', sequelize);
+  } catch (err) {
+    console.error('Error connecting to DB:', err);
+  }
+};
+
+export default dbPlugin;

src/routes/user.ts

+import { FastifyPluginAsync } from 'fastify';
+import { z } from 'zod';
+import { User } from '../models/User';
+
+const userSchema = z.object({
+  name: z.string(),
+  email: z.string().email()
+});
+
+const userRoutes: FastifyPluginAsync = async (fastify) => {
+  fastify.post('/', async (req, res) => {
+    const parsed = userSchema.safeParse(req.body);
+    if (!parsed.success) {
+      return res.status(400).send(parsed.error);
+    }
+
+    const user = await User.create(parsed.data);
+    res.send(user);
+  });
+};
+
+export default userRoutes;

tsconfig.json

+{
+  "compilerOptions": {
+    "target": "ES2022",                         // Or ES2020+, avoid ESNext for now
+    "module": "CommonJS",
+    "experimentalDecorators": true,
+    "emitDecoratorMetadata": true,
+    "strict": true,
+    "moduleResolution": "node",
+    "esModuleInterop": true,
+    "skipLibCheck": true
+  }
+}