`populate()` on Arrays broken

[schw4rzlicht]

Is there an existing issue for this?

• I have searched the existing issues

Current behavior

Using populate() on an array of ObjectIDs stopped working and does not populate the array.

Minimum reproduction code

https://github.com/schw4rzlicht/nestjs-mongoose-populate-bug

Steps to reproduce

Instructions in the linked repo.

Expected behavior

Populated child array should contain sub documents.

Package version

>=10.0.2

mongoose version

7/8 (doesn't matter)

NestJS version

10/11 (doesn't matter)

Node.js version

>=20

In which operating systems have you tested?

• macOS
• Windows
• Linux

Other

I can pinpoint the issue to the change made in this PR. When I revert that change, everything works as expected.

[kamilmysliwiec]

Would you like to create a PR for this issue?

[schw4rzlicht]

I will try and keep you posted.

[kamilmysliwiec]

Let's track this here #2438