Annotating HashMap<i64, CoolType> to use number instead of bigint for Keys

[hongyilyu]

Hi there,

I'm working on serializing HashMap<i64, CoolType> using ts_rs. By default, the generated TypeScript type looks like this:

{ [key in bigint]?: Array<CoolType> }

However, I would prefer to use number for the keys instead of bigint. I attempted to annotate the map directly with a custom type, but encountered an issue where CoolType is not imported correctly. Here's what I tried:

#[derive(Debug, Clone, Serialize, TS)]
#[ts(export)]
pub struct AwesomeStruct {
    #[ts(type = "{ [key in number]?: Array<CoolType> }")]
    pub cool_types: HashMap<i64, Vec<CoolType>>,
}

The problem with this approach is that ts_rs does not recognize the use of CoolType, leading to TypeScript compilation errors.

What is the recommended way to annotate a type within a type?

[NyxCode]

Hey!
I think #[ts(as = "HashMap<i32, Vec<CoolType>>")] should work.

[hongyilyu]

That works!
Thanks for the response!!!