Bulk writes in mongoose

index.js

const mongoose = require('mongoose')
const { Types, Schema } = mongoose

// Connect to mongo
mongoose.connect('mongodb://localhost/bulk');

// Set model schema
const ArticleSchema = new Schema({
  title: {
    type: String,
    required: true
  },
  published: {
    type: Boolean,
    default: false
  }
});

// Register model
const Article = mongoose.model('Article', ArticleSchema);

// Insert function
function insertOne(document) {
  return {
    insertOne: {
      document
    }
  }
}

// Update function
function updateOne(filter, update) {
  return {
    updateOne: {
      filter,
      update: {
        $set: update
      }
    }
  }
}

function deleteOne(filter) {
  return {
    deleteOne: {
      filter
    }
  }
}

// Ids holder
const ids = []

// Create 20 object ids
for (let i = 0; i < 20; i++) {
  ids.push(Types.ObjectId())
}

// Creeate bulk inserts
const insertOps = ids.map((_id, i) => insertOne({ _id, title: `Hi ${i}` }))

// Create bulk updates
const updateOps = ids.map(_id => updateOne({ _id },{ published: true }))

// Create bulk deletes
const deleteOps = ids.map(_id => deleteOne({ _id }))

// Execute bulk insert and update ops
Article.bulkWrite([...insertOps, ...updateOps]).then(res => {
  console.log(res)

  // Fetch all docs
  Article.find().then(res => {
    console.log(JSON.stringify(res, null, 2))
  })

  // Execute bulk delete ops
  Article.bulkWrite(deleteOps).then(res => {
    console.log(res)
  })

})