How to use the mongoose.Types function in mongoose

async create(req, res) {
    let body = req.body;
    let obj = _.pick(body, 'name', 'email', 'mobile', 'address', 'content');
    obj.ip = util.getIp(req);
    obj.content = xss(obj.content);

    let user = req.user
    if (user) {
      obj.author = mongoose.Types.ObjectId(user._id)
    }
    let data;
    let error;
    try {
      data = await messageService.create(obj);
    } catch (e) {
      // console.log(e);
      error = e.message;
    }
    res.json({
      success: !error,
      data: data,
      error: error
    });
  }
}

router.get('/ajax/hideNotification', (req, res) => {
    console.log('hide nofication');
    console.log(req.query.idOfNotif);


    // console.log(mongoose.Types.ObjectId(req.query.idOfNotif));

    myNotification.findByIdAndRemove(mongoose.Types.ObjectId(req.query.idOfNotif), (err) => {
        if (err) {
            console.log(err);
        }

        User.findOne({ username: req.user.username }).populate('notifications').exec(async (err, foundUser) => {
            foundUser.markModified('notifications');
            await foundUser.save();
        });
    });

    res.status(200).send('done');
});

}

        function reverseEntry() {
            JournalEntryService.findAndReverse({id: id, dbName: dbIndex, uId: req.session.uId});
        }

        if (data.invoiceDate) {
            date = moment(new Date(data.invoiceDate));
            date = date.format('YYYY-MM-DD');
        }

        if (data.notes && data.notes.length !== 0) {
            obj = data.notes[data.notes.length - 1];

            if (!obj._id) {
                obj._id = mongoose.Types.ObjectId();
            }

            // obj.date = new Date();

            if (!obj.user) {
                obj.user = {};
                obj.user._id = req.session.uId;
                obj.user.login = req.session.uName;
            }

            data.notes[data.notes.length - 1] = obj;
        }

        if (data.fileName) {

            fileName = data.fileName;

var mongoose = require('mongoose');
var Schema   = mongoose.Schema;
var ObjectId = Schema.ObjectId;
var mObjectId = mongoose.Types.ObjectId;
var event    = require('../Shared/event.js');

var optionSchema = {
  name: String,
  content: String,
  allowAddReasonStatus: {type: Boolean, default: false} // 某一项选择中是否可以用户选择后添加文字说明
}

var gradeSchema = {
  step: Number,
  begin: Number,
  end: Number,
  type: String
}

gradeSchema = new Schema(gradeSchema, {versionKey: false, id: false});

function testAddErrorAndCheck()
{
  console.log("Starting TestAddErrorAndCheck...");

  var mt1 = new Movietheater();
  var mt2 = new Movietheater(); mt2._id = (new mongoose.Types.ObjectId).toString(); mt2.city = "city"; mt2.country = "country"; mt2.name = "name";

  if (mt1.validateSync() === undefined || Object.values(mt1.validateSync().errors).length !== 4)
    console.error("Error: movietheater1 was not correctly validated.");
  if (mt2.validateSync() !== undefined)
    console.error("Error: movietheater2 was not correctly validated.");

  var m1 = new Media(); m1.name = "name1"; m1.url = "url1";
  var m2 = new Media(); m2.name = "name2"; m2.url = "url2";

  if (m1.validateSync() !== undefined)
    console.error("Error: media1 was not correctly validated.");
  if (m2.validateSync() !== undefined)
    console.error("Error: media2 was not correctly validated.");

  var c1 = new Criticism(); c1.color = "color1"; c1.journalist = "journalist1"; c1.media = [m1, m2];
  var c2 = new Criticism(); c2.color = "color2"; c2.journalist = "journalist2"; c2.media = "media2";

function testAddErrorAndCheck()
{
  console.log("Starting TestAddErrorAndCheck...");

  var a1 = new Artist();
  var a2 = new Artist(); a2._id = (new mongoose.Types.ObjectId).toString(); a2.name = "name"; a2.startingYear = 1999;

  if (a1.validateSync() === undefined || Object.values(a1.validateSync().errors).length !== 3)
    console.error("Error: artist1 was not correctly validated.");
  if (a2.validateSync() !== undefined)
    console.error("Error: artist2 was not correctly validated.");

  var m1 = new Media(); m1.name = "name1"; m1.url = "url1"; m1.type = "type1";
  var m2 = new Media(); m2.name = "name2"; m2.url = "url2"; m2.type = "type2";

  if (m1.validateSync() !== undefined)
    console.error("Error: media1 was not correctly validated.");
  if (m2.validateSync() !== undefined)
    console.error("Error: media2 was not correctly validated.");

  var r1 = new Review(); r1.journalist = "journalist1"; r1.rank = "Very good"; r1.media = [m1, m2];
  var r2 = new Review(); r2.journalist = "journalist2"; r2.rank = "Poor"; r2.media = "media2";

exports.create_toolbox = (req, res, next) => {
  const newToolbox = new Toolbox({
    _id: new mongoose.Types.ObjectId(),
    name: req.body.name,
    displayName: req.body.displayName,
    desc: req.body.desc,
    category: req.body.category,    
    usecase: req.body.usecase,
    tools: req.body.tools
  });
  newToolbox
    .save()
    .then(result => {
      console.log(result);
      res.status(201).json({
        message: "Created toolbox successfully",
        createdToolbox: {
          _id: result._id,
          name: result.name,

return new Promise(function(fulfill, reject) {
        if (!userId) reject("recipient user id is missing");

        userId = mongoose.Types.ObjectId(userId);
        messageId = mongoose.Types.ObjectId(messageId);

        if (!userId || !messageId) reject("User or message id is missing. Message deletion failed.");
        else
        {
            MessageModel.remove({ "$and": [ { "$or": [{to: userId}, {from: userId} ] }, {_id: messageId} ] }, 
                                function(err, message) {
                                    if (err) {
                                        logger.error("messageService.deleteMessage " + err);
                                        reject("Message deletion failed");
                                    } 
                                    else {
                                        fulfill(message);
                                    }
                                });
        }
    });