Fix the following issue:
Typescript: Wrong return type when using lean in different way
Prerequisites
- I have written a descriptive issue title
- I have searched existing issues to ensure the bug has not already been reported
Mongoose version
6.X.X - 7.X.X
Node.js version
at least 16
MongoDB server version
at least 4
Typescript version (if applicable)
4.7 - latest
Description
The return type of
const a = await Model.findById('my-id', undefined, { lean: true })
is the same as
const a = await Model.findById('my-id')
it's:
// ^? const a: (mongoose.Document<unknown, {}, { name: string; }> & { name: string; } & { _id: mongoose.Types.ObjectId; }) | null
Steps to Reproduce
See ts playground
Expected Behavior
The return type should be the same as
const a = await Model.findById('a').lean()
it's:
// ^? const a: (mongoose.FlattenMaps<{ name: string; }> & { _id: mongoose.Types.ObjectId; }) | null