Project – Todo REST API (Express + TypeORM)

Folder layout

src/
  entity/
    Todo.ts
  controller/
    todo.controller.ts
  router/
    todo.router.ts
  server.ts

Entity (Todo.ts)

import { Entity, PrimaryGeneratedColumn, Column } from 'typeorm';

@Entity()
export class Todo {
  @PrimaryGeneratedColumn()
  id!: number;

  @Column()
  title!: string;

  @Column({ default: false })
  completed!: boolean;
}

Controller

import { Request, Response } from 'express';
import { AppDataSource } from '../data-source';
import { Todo } from '../entity/Todo';

const repo = AppDataSource.getRepository(Todo);

export const getTodos = async (_: Request, res: Response) => {
  const todos = await repo.find();
  res.json(todos);
};

export const createTodo = async (req: Request, res: Response) => {
  const todo = repo.create(req.body);
  const result = await repo.save(todo);
  res.status(201).json(result);
};

Router

import { Router } from 'express';
import { getTodos, createTodo } from '../controller/todo.controller';

const router = Router();
router.get('/', getTodos);
router.post('/', createTodo);
export default router;

Server (server.ts)

import 'reflect-metadata';
import express from 'express';
import { AppDataSource } from './data-source';
import todoRouter from './router/todo.router';

async function bootstrap() {
  await AppDataSource.initialize();
  const app = express();
  app.use(express.json());
  app.use('/todos', todoRouter);
  app.listen(3000, () => console.log('🦾 API listening on 3000'));
}
bootstrap();

Run npm run dev (with ts-node-dev).