`updateMany` fails on `data` array of existing records

Bug description

I’m not sure if I’m using updateMany incorrectly but I’m experiencing an odd bug.

I have an array of model records retrieved using findMany, updated via Array.map, and I’m attempting to then update the records using updateMany.

I get an error that complains about passing incorrect types to data, but don’t see how that’s possible. My hunch is that it’s actually a problem with using updateMany to update records with different values per record id—the documentation suggests updateMany is better suited to update many records with the same values.

Am I using updateMany wrong, or is this unexpected behaviour? Thanks in advance!

How to reproduce

1. Run an updateMany query against records with specific IDs and differing values per ID
2. See type error

Expected behavior

Records should be updated to match the passed data array

Prisma information

model User {
  id Int @id @default(autoincrement())
  bestFriendId Int?
  bestFriend User? @relation(fields: [bestFriendId], references: [id])
}

const records = await prisma.user.findMany()
const updatedRecords = records.map(user => {
  user.bestFriendId = findBestFriendId(user) // either an Int or null/undefined
  return user
}

console.log(updatedRecords.slice(0, 2))
// [{ id: 1, bestFriendId: 3 }, { id: 2, bestFriendId: null }]

await prisma.user.updateMany({ data: updatedRecords }) // returns type error

Environment & setup

• OS: macOS
• Database: MySQL/Planetscale
• Node.js version: 16.13.0

Prisma Version

3.5.0

[Andy671]

The same question … Have you figured out how to use updateMany with different values per id?

[heymartinadams]

I wonder if @daneden’s issue (and my issue) could be solved via a Prisma Extension.

Source: https://twitter.com/ruheni_alex/status/1592832451013128194