TypeError: The "payload" argument must be of type object. Received null #26178
Description
Bug description
I encountered the following error earlier.
{
slug: '',
title: '',
description: '',
adminOnly: false,
permissionLevel: 3,
authorNote: '',
json: {
title: 'Title',
body: 'This is a demo. You can edit it.',
isActive: true,
like: 5431,
tag: [ 'food', 'travel', 'technology' ],
block: { title: 'Block', body: 'This is a block.' },
publishedAt: '2025-01-25T03:51:38.433Z'
}
}
⨯ TypeError: The "payload" argument must be of type object. Received null
at dbExceptionHandler (src/exception-handling/exception-handler-db.ts:2:10)
at async JsonContentService.create (src/services/json-content-service.ts:119:11)
at async createJsonContent (src/app/[locale]/admin/(main-contents)/json-content/_actions/create.ts:11:14)
1 | export const dbExceptionHandler = (error: unknown) => {
> 2 | console.log(error)
| ^
3 | return null
4 | } {
code: 'ERR_INVALID_ARG_TYPE',
digest: '2836743208'
}
The cause is here, slug is optional, but it has a unique constraint. The error occurred because there was one record with an empty string '' for slug.
model JsonContent {
id Int @id @default(autoincrement())
slug String? @unique
//...
}Of course, this is entirely my mistake. I am responsible.
Prisma is not at fault.
However, please let me say this.
What the heck is "TypeError: The "payload" argument must be of type object. Received null"?
If it's a unique constraint violation, please tell me that honestly. Prisma used to tell me that before.
Why did it suddenly become such a strange error message?
I really love Prisma.
I want to know why I got such an error message.
How to reproduce
It might be reproducible if you cause a unique constraint violation.
I am implementing it like this:
// repository class
createYourData(
operatorId: number,
values: z.infer<typeof yourSchema>
) {
return prisma.someTable.create({
data: {
// your data
}
})
}// service class
async create(operatorId: number, values: z.infer<typeof yourSchema>) {
return await this._yourRepository.create(operatorId, values).catch(dbExceptionHandler)
}export const dbExceptionHandler = (error: unknown) => {
console.error(error)
return null
}Expected behavior
No response
Prisma information
model JsonContent {
id Int @id @default(autoincrement())
slug String? @unique
//...
}Environment & setup
- OS: macOS
- Database: PostgreSQL
- Node.js version: 22.13.0
Prisma Version
6.2.1