[core] How can I use mapWith with arrays?

[micalevisk]

Hey!

I'm trying to use mapWith when the source and destination values are arrays. Is there a way to do this?

What I've done:

mapper.createMap(User, UserDto).forMember(
  (d) => d.someArrayField,
  mapWith(
    () => XDto,
    (s) => [], // the mapper will return an XDto instance instead of this value
    () => X
  )
)

I see that is a limitation due to these lines:

mapper/packages/core/src/lib/member-map-functions/map-with.ts

Lines 24 to 26 in 1331bbf

	(source, mapper) => {
	const sourceValue = withSourceValue(source);
	return mapper.map(

since if I use mapper.mapArray instead, it will work as I expected.

To test that you could use this:

mapper/packages/integration-test/src/lib/with-classes/fixtures/profiles/user-profile.profile.ts

Lines 21 to 25 in 6187453

	(d) => d.avatar,
	mapWith(
	() => AvatarVm,
	(s) => s.avatar,
	() => Avatar

but changing .avatar to .addresses, AvatarVm to AddressVm and Avatar to Address (I didn't test this tbh)

---

My use case is basically like this:

class A {
  // ...
  @AutoMap(() => B)
  b: B[]
}

class B {
  // ...
  @AutoMap(() => C)
  c: C
}

class C {}

class AVm {
  @AutoMap(() => CVm)
  c: CVm[] // I want to extract this from B[]
}

class CVm {}

[micalevisk]

I've managed to do this kind of mapping with @nartc/automapper so the migration guide should have some thoughts about that, right? 😕

[nartc]

@micalevisk Thanks for reporting. Please try 2.0.1 out

[micalevisk]

@nartc it works now! ty