bulkWrite throws an error when set timestamps: false in schema

[SoftwareSing]

Do you want to request a feature or report a bug?
bug

What is the current behavior?

When set timestamps: false in schema, bulkWrite with insertOne or replaceOne will throw an error.
But it works fine when set timestamps: null or just don't set timestamps.

If the current behavior is a bug, please provide the steps to reproduce.

const mongoose = require('mongoose')

module.exports = async function bulkInsertOne () {
  const schema = new mongoose.Schema({ name: String }, { timestamps: false })
  const Model = mongoose.model('MyModel', schema)
  await Model.bulkWrite([{
    insertOne: {
      document: { name: 'test' }
    }
  }])
}

error:

(node:24085) UnhandledPromiseRejectionWarning: TypeError: doc.initializeTimestamps is not a function
    at /home/miku/_____/code/test-for-mongoose-timestamps/node_modules/mongoose/lib/helpers/model/castBulkWrite.js:24:13
    at /home/miku/_____/code/test-for-mongoose-timestamps/node_modules/mongoose/lib/model.js:3500:35
    at each (/home/miku/_____/code/test-for-mongoose-timestamps/node_modules/mongoose/lib/helpers/each.js:11:5)
    at /home/miku/_____/code/test-for-mongoose-timestamps/node_modules/mongoose/lib/model.js:3500:5
    at /home/miku/_____/code/test-for-mongoose-timestamps/node_modules/mongoose/lib/helpers/promiseOrCallback.js:31:5
    at new Promise (<anonymous>)
    at promiseOrCallback (/home/miku/_____/code/test-for-mongoose-timestamps/node_modules/mongoose/lib/helpers/promiseOrCallback.js:30:10)
    at Mongoose._promiseOrCallback (/home/miku/_____/code/test-for-mongoose-timestamps/node_modules/mongoose/lib/index.js:1149:10)
    at Function.Model.bulkWrite (/home/miku/_____/code/test-for-mongoose-timestamps/node_modules/mongoose/lib/model.js:3498:23)
    at bulkInsertOne (/home/miku/_____/code/test-for-mongoose-timestamps/src/bulkInsertOne.js:6:15)
    at main (/home/miku/_____/code/test-for-mongoose-timestamps/src/main.js:7:9)
    at processTicksAndRejections (internal/process/task_queues.js:93:5)

What is the expected behavior?

It should not throw any error.

What are the versions of Node.js, Mongoose and MongoDB you are using? Note that "latest" is not a version.

• Node.js version: 14.16.0
• Mongoose version: 5.12.1
• MongoDB version: 4.2.13

[vkarpov15]

@SoftwareSing the below script executes without error. Please modify the below script to demonstrate your issue:

const mongoose = require('mongoose');

mongoose.set('debug', true);

run().catch(err => console.log(err));

async function run() {
  await mongoose.connect('mongodb://localhost:27017/test', {
    useNewUrlParser: true,
    useUnifiedTopology: true
  });

  await mongoose.connection.dropDatabase();

  const schema = new mongoose.Schema({ name: String }, { timestamps: false });
  const Model = mongoose.model('MyModel', schema)
  await Model.bulkWrite([{
    insertOne: {
      document: { name: 'test' }
    }
  }]);

  console.log('Done');
}

[SoftwareSing]

@vkarpov15 well...... it's already fixed by #10050 , I don't know why this issue is reopened.