insert document in bulk using for loop mongoose

Question

Why this won't insert 20 document for me?

for (let i = 0; i <= 20; i++) {
  const [updated] = await Promise.all([
    Job.findOneAndUpdate(
      { _id: id },
      {
        $set: {
          status: 'something'
        }
      },
      { upsert: true, new: true }
    ),
    User.findOneAndUpdate(
      { _id: userId },
      {
        $set: { assigned: true }
      },
      { upsert: true, new: true }
    )
  ])
}

or I should use reduce and Promise resolve? Above query worked just that it doesn't insert 20 documents, it inserted one document.

Answer 1

If you have array of id then you can use bulkWrite

const id = ['844646464', '45646546546', '45646546546']

Model.bulkWrite(
  req.body.idArray((id) => {
    return ({
      updateOne: {
        filter: { _id: id },
        update: { $set: { status: 'something' } },
        upsert: true
      }
    })
  })
})

It will create a request something like this

bulkWrite([
   { updateOne: { filter: { _id: id }, update: { $set: { status: 'something' } } },
   { updateOne: { filter: { _id: id }, update: { $set: { status: 'something' } } },
   { updateOne: { filter: { _id: id }, update: { $set: { status: 'something' } } } 
])

Which efficiently performs all updates in a single request to the server with a single response.