Model named "Key" is incorrectly typed

Bug description

I have a model called Key. When I run prisma generate and try to use the TypeScript types, the type for Key is incorrect. Looking at the generated TS file, I see two Key types.

I don’t see these in the reserved word list: https://github.com/prisma/prisma/blob/master/src/packages/client/src/generation/generateClient.ts#L368

How to reproduce

1. Setup Prisma with the supplied schema.
2. Look at the TS types
3. Notice the TS type for the Key model is incorrect.

Expected behavior

There should not be a TS error.

If that’s not possible, maybe throw an error when using reserved words like Key or count.

Prisma information

model Key {
  id               Int                @id
  name             String?            @db.VarChar(45)
  AnotherTable     AnotherTable[]
}

model AnotherTable {
  id                     Int              @id @default(autoincrement())
  keyId                  Int
  Key                    Key              @relation(fields: [keyId], references: [id])

  @@index([keyId], name: "fk_AnotherTable_Key_idx")
}

When I run prisma generate and try to use the TypeScript types, the type for Key is incorrect.

type TResponse = Prisma.AnotherTableGetPayload<{
    include: {
        Key: true;
    };
}>

const obj: TResponse = {
    id: 4,
    Key: { id: 4, name: 'name' }
};

When I mouse over Key, I get the following:

(property) Key: Prisma.Key
Type '{ id: number; name: string; }' is not assignable to type 'Key'.
  Type '{ id: number; name: string; }' is not assignable to type 'symbol'.ts(2322)

Looking at the generated TS file, I see two Key types.

...

/**
 * Model Key
 */

export type Key = {
  id: number
  name: string | null
}

...

export namespace Prisma {

  ...

  type Key = string | number | symbol;

  ...

}

---

Below has been fixed by 2.23.0. Incidentally, as I was writing this description, I updated the Prisma version to the latest and ran into another similar error with a column named count. The generated TS file looked like this:

  export type ExerciseGroupByOutputType = {
    id: number
    count: number | null
    count: ExerciseCountAggregateOutputType | null
    avg: ExerciseAvgAggregateOutputType | null
    sum: ExerciseSumAggregateOutputType | null
    min: ExerciseMinAggregateOutputType | null
    max: ExerciseMaxAggregateOutputType | null
  }

I got the following errors:

error TS2300: Duplicate identifier 'count'.
error TS2717: Subsequent property declarations must have the same type.  Property 'count' must be of type 'number | null', but here has type 'ExerciseCountAggregateOutputType | null'.

---

Environment & setup

• OS: Mac OS
• Database: MySQL
• Node.js version: v15.10.0

Prisma Version

2.22.1

[pantharshit00]

I can confirm this Key issue.

[janpio]

Yes, you are looking at the issue tracking it. Compared to other problems this is not important enough to be prioritized right now though. Sorry.