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Documentation Changes Summary:

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1. What would you like to communicate to the user about this feature?
2. Would you like the user to see examples of the syntax and/or executable code and its output?
3. Which versions of the driver/connector does this apply to?

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1. What would you like to communicate to the user about this feature? 2. Would you like the user to see examples of the syntax and/or executable code and its output? 3. Which versions of the driver/connector does this apply to?

`Collection.bulkWrite` and `Collection.initialize*BulkOp().execute()` do not respect the user provided pkFactory when generating document ids.

This can lead to inconsistent data if regular crud APIs are used as well as bulk APIs.

This notably does not apply to Collection.insertMany().

latest, but the behavior has been here forever.

import { randomBytes } from 'crypto';

import { MongoClient } from './src/mongo_client';

async function main() {

  const client = await MongoClient.connect(process.env.MONGODB_URI!, {

    pkFactory: {

      count: 0,

      createPk: function () {

        return this.count++;

});

  const collection = client.db('foo').collection(randomBytes(8).toString('utf-8'));

  await collection.insertMany([{ a: 1 }, { a: 2 }, { a: 3 }]);

  await collection.bulkWrite([{ insertOne: { a: 1 } }]);

  console.log(await collection.find().toArray());

main();

// output:

// [

//  { _id: 0, a: 1 },

//  { _id: 1, a: 2 },

//  { _id: 2, a: 3 },

//  { _id: new ObjectId("65036cbf71bcb5518605c620"), a: 1 }

// ]

duplicates

NODE-5636 bulk write APIs do not use pkFactory when creating document _ids