pre query middelwares have no effect on QueryCursor projection

[dbellavista]

Prerequisites

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

Mongoose version

7.0.3

Node.js version

18.12

MongoDB server version

6.0

Typescript version (if applicable)

No response

Description

If a pre-query middelware (e.g. 'find') tries to modify the query projection, it has effect ONLY if the query is not a cursor. Otherwise the select/projection modified the projection of the original Query object and not the projection of the QueryCursor object.

Steps to Reproduce

Here's the script:

https://gist.github.com/dbellavista/c22bfe3fbffac4be1de4cd3d9483d442

Expected Behavior

The script should not fail with an assertion error.

[dbellavista]

If you have any workaround I'd gladly accept anything... This is causing some problems.. Also if I can find anything of value I'll let you know.