Todolist POST endpoint

app.js

//comments: We’ve added some basic input validation to ensure that the basic requirement that every todo list has a name is met.

app.post("/todolists", function(req, res) {
  var postQuery = {createDate: new Date()};

  if (req.body.name == "undefined") {
    handleError(null, res, "Must provide a todolist name");
  }
  postQuery.name = req.body.name;

  if (req.body.todos !== "undefined") {
    var todos = req.body.todos;
    todos.forEach(function(elem) {
      if (!("_id" in elem)) {
        elem._id = new ObjectId();
      }
    });
    postQuery.todos = todos;
  }

  db.collection("todolists").insertOne(postQuery, function(err, doc) {
    if (err) {
      handleError(err, res, "Failed to create new todolist.");
    } else {
      console.log("Successfully inserted new todolist");
      res.status(201).json(doc.ops[0]);
    }
  });
});