Prisma•9mo ago

TypeScript errors with new `prisma-client` generated client

Hello people! I have a small question: I tried to update a small project to use the new generated client feature. It runs fine and it all works as it should, but when I run

tsc -b

tsc -b

to perform type checking, it fails with

app/generated/prisma/client/client.ts:341:16 - error TS4094: Property '_brand_DbNull' of exported anonymous class type may not be private or protected.

341 export const DbNull = runtime.objectEnumValues.instances.DbNull
~~

app/generated/prisma/client/client.ts:341:16
341 export const DbNull = runtime.objectEnumValues.instances.DbNull
~~
Add a type annotation to the variable DbNull.

app/generated/prisma/client/client.ts:348:16 - error TS4094: Property '_brand_JsonNull' of exported anonymous class type may not be private or protected.

348 export const JsonNull = runtime.objectEnumValues.instances.JsonNull
~~

app/generated/prisma/client/client.ts:348:16
348 export const JsonNull = runtime.objectEnumValues.instances.JsonNull
~~
Add a type annotation to the variable JsonNull.

app/generated/prisma/client/client.ts:355:16 - error TS4094: Property '_brand_AnyNull' of exported anonymous class type may not be private or protected.

355 export const AnyNull = runtime.objectEnumValues.instances.AnyNull
~

app/generated/prisma/client/client.ts:355:16
355 export const AnyNull = runtime.objectEnumValues.instances.AnyNull
~
Add a type annotation to the variable AnyNull.

Found 3 errors.

I'm not quite sure how to resolve this. Does anyone have a suggestion? I made a public reproduction: https://github.com/jensmeindertsma/fuel/pull/6 feel free to clone this branch and run

pnpm install && pnpm typecheck

pnpm install && pnpm typecheck

to see the issue. Thanks so much in advance!

GitHub

Upgrade Prisma by jensmeindertsma · Pull Request #6 · jensmeinder...

I tried to upgrade Prisma to use the new generated client feature. I ran into some issues with TypeScript type checking:
❯ pnpm typecheck

> @jensmeindertsma/fuel@ typecheck /home/jens/deve...

Prisma AI Help•4/9/25, 9:11 AM

You chose to debug with a human. They'll tinker with your query soon. If you get curious meanwhile, hop into for a quick spin!

Nurul•4/9/25, 3:05 PM

Just to confirm, if you ran

tsc -b

tsc -b

command with Prisma version 6.5.0, it was working fine?

NNurul Just to confirm, if you ran `tsc -b` command with Prisma version 6.5.0, it was w...

roguehusky3OP•4/9/25, 3:55 PM

Yes, this was working fine. With version 6.5.0 I was using the non-generated client, if I try using 6.5.0 while also setting ( also switch back to ) I ran into the weird problem that the whole client was being printed to the terminal, causing my terminal emulator to quickly run out of memory

roguehusky3OP•4/9/25, 3:57 PM

This looks something like this:

roguehusky3OP•4/9/25, 3:57 PM

times 100000000 in length

roguehusky3OP•4/9/25, 4:26 PM

It looks as it the Prisma Client contains some invalid typescript code

roguehusky3OP•4/9/25, 7:12 PM

If I can do anything to help debug this further please let me know

Torsten•9/12/25, 2:13 PM

Started today with prisma but ended in frustration:

The code of the generated client seems to be somehow garbage...

Vercel CLI 47.1.3
Retrieving projectÔÇª

Ready! Available at http://localhost:3000

(node:12540) [DEP0060] DeprecationWarning: The API is deprecated. Please use Object.assign() instead.
prisma/app/generated/prisma-client/index.d.ts(38,3): error TS1139: Type parameter declaration expected.
prisma/app/generated/prisma-client/index.d.ts(38,19): error TS1005: ',' expected.
prisma/app/generated/prisma-client/index.d.ts(38,63): error TS1181: Array element destructuring pattern expected.
prisma/app/generated/prisma-client/index.d.ts(38,68): error TS1005: ';' expected.

[and tons of addtional errors]