ustk-todolist/routes/todos.js

const express = require('express');
const mongoose = require('mongoose');

const router = express.Router();

const TodoList = mongoose.model('TodoList');
const Todo = mongoose.model('Todo');

const asyncHelper = require('../asyncHelper');

// index
router.get(
  '/',
  asyncHelper(async (req, res) => {
    const todos = await Todo.find({}).exec();
    res.json(todos);
  }),
);

// create
router.post(
  '/',
  asyncHelper(async (req, res) => {
    const { text, listId } = req.body;
    const list = await TodoList.findById(listId);
    const todo = new Todo({ text, list: list._id });
    await todo.save();
    list.todos.push(todo.id);
    await list.save();
    res.json({ success: true });
  }),
);

module.exports = router;