How to handle generic types does not satisfy X

[mighty egret]

Hey guys,
I am trying to use generics (I am fairly new to TS) and I am facing an issue:

`Type 'T' does not satisfy the constraint 'DocumentSchema[]``

What does that mean exactly and how to fix this?

Thanks!

[chilly zodiac]

MultiSearchResponse can only take elements that are DocumentSchema[]

but the function you wrote accepts anything as T

and uses that same T, and passes it to MultiSearchResponse

you need to put the same constraint on the function as well

[mighty egret]

thanks for your reply, so do I need an intermediary time such as:
type TypesenseEmployeeDocument<T extends DocumentSchema> = T?

[chilly zodiac]

private async performMultiSearch<T extends DocumentSchema[]>(
  // ...
): Promise<MultiSearchResponse<T>> {
}

oh, wait

forget what I just said

[mighty egret]

that makes sense but then the problem goes up to the upper function, where T does not extend DocumentSchema[]

[chilly zodiac]

tldr. you could provide the generic type when calling your function

like so

performMultiSearch<Foo>([1, 2, 3], searchParams);

but the function would return a Promise<MultiSearchResponse<DocumentSchema[]>>

[mighty egret]

yes but performMultiSearch exptect also something that extends DocumentSchema[]

[chilly zodiac]

ok, so T should be a DocumentSchema[] in the function as well

[mighty egret]

yes that's what I am wondering, how to make it a DocumentSchema[]

[chilly zodiac]

maybe you could post the relevant part of the code

not too sure how all the types come together