TS compilation fails with noUncheckedIndexedAccess set to true

[aracheli-fae]

Describe the Bug
Generated file helpers.ts in invalid for TypeScript setups with "noUncheckedIndexedAccess": true in their tsconfig.json.
This is an issue if the code is generated outside of node_modules, for example with the config:

generator typegraphql {
  provider        = "typegraphql-prisma"
  output          = "../generated/type-graphql"
}

The issue is due to an unchecked index access:

generated/type-graphql/helpers.ts:27:22 - error TS2488: Type '[string, any] | undefined' must have a '[Symbol.iterator]()' method that returns an iterator.

27               const [[key, { value }]] = Object.entries(argument);

To Reproduce

• Add "noUncheckedIndexedAccess": true to your tsconfig.json
• Add a custom output to your generator config

Expected Behavior
TS should be able to compile correctly

Environment (please complete the following information):

• OS: MacOS 15.6.1
• Node 22.18.0
• typegraphql-prisma 0.28.0
• Prisma version 5.22.0
• TypeScript version 5.9.2

Additional Context
Opening a PR to solve this issue.

[MichalLytek]

You should configure your compiler and linter in a way that the generated code is not linted or checked. It's over your control, so it should not yell at you.

[aracheli-fae]

You're right, I could exclude the generated code from my TS config.
The issue though seems to be actually there (unchecked access): I still don't know if __arguments can actually be an empty object in some cases, but the added check makes sure that this won't happen.

That said, if you still consider it out of scope I'll close the issue and PR.