PartialType and IntersectionType doesn't work as expected about mapped-types

[kamilmysliwiec]

Fixed in 2.0.2

[Keeper991]

https://github.com/Keeper991/partial-type-issue/blob/master/src/app.service.ts

ChildClass inherits ParentClass with PartialType, and tried to push partial object in ChildClass Array(line:16).
but ts throws an error message 'missing the following properties from type 'ChildClass': age, job'.

[vincent-ogury]

@micalevisk did the example above help ? it show the problem immediately.

[micalevisk]

thanks!

that was a regression introduced by PR #1027 on v2.0.0

[micalevisk]

and that's due to your strictNullChecks being false btw

which breaks the following utility:

mapped-types/lib/types/remove-fields-with-type.type.ts

Line 6 in f5b4b91

type KeysOfType<T, U> = { [K in keyof T]: T[K] extends U ? K : never }[keyof T];

[Keeper991]

I faced the same problem. There is a problem in that the properties of the instance of the class inherited as a partial type are not guided to optional. 🥲

[micalevisk]

@Keeper991 do you mind on sharing a minimum reproduction repository? it would help us to fix that quickly

[micalevisk]

@vincent-ogury
@celogeek

minimum reproduction repository

(note the repository part)

please don't spam. That doesn't help on fixing the issue. Also, you guys could investigate why that bug exists and try to fix that as well :)

[micalevisk]

@vincent-ogury

why reproductions are required