The error caused by Binary when using lean queries still exists in `8.9.2`

[nikzanda]

Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the bug has not already been reported

Mongoose version

8.9.2

Node.js version

20.10.0

MongoDB server version

6.0.2

Typescript version (if applicable)

5.5.4

Description

In version 8.9.2 of Mongoose, it seems that the error shown in this issue (and this one) is still not resolved.

In the reproduction link the query does not return IParent fields:

Instead, in my project, the last part of the error updates from:

Type 'Binary | null | undefined' is not assignable to type 'Buffer | undefined'.
Type 'null' is not assignable to type 'Buffer | undefined'.

to

Type 'Binary | undefined' is not assignable to type 'Buffer | undefined'.
Type 'Binary' is missing the following properties from type 'Buffer': equals, compare, copy, slice, and 93 more.

Steps to Reproduce

Reproduction link here.

Expected Behavior

No response

[timheerwagen]

Can confirm, repro:

import mongoose from "mongoose";

type FooBar = {
  value?: string;
};

const TestSchema = new mongoose.Schema<FooBar>({
  value: { type: String },
});

export const FooBarModel = mongoose.model<FooBar>("test", TestSchema);

const main = async () => {
  const item = await FooBarModel.findOne().lean();

  if (!item) return;

  doSomeThing(item);
};

const doSomeThing = (item: FooBar) => {
  console.log(item);
};