Incompatibility with Typescript 4.8.2 - Schemas that use query population (ObjectId and Ref) fail with serialization errors

Prerequisites

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

Mongoose version

6.5.4

Node.js version

14.17.6

MongoDB server version

4.2 but N/A

Description

When using a schema that uses query population and has a property defined with type set to ObjectId and a ref set. You get serialization errors when building. This seems to have started occurring recently, I tested with Typescript 4.8.2 but suspect its anything 4.8.x

src/person/schemas/person.schema.ts:23:14 - error TS4118: The type of this node cannot be serial ized because its property ‘[iterator]’ cannot be serialized. 23 export const PersonSchema = new Schema( ~~~~~~~~~~~~ src/person/schemas/person.schema.ts:23:14 - error TS4118: The type of this node cannot be serialized because its property ‘[species]’ cannot be serialized. 23 export const PersonSchema = new Schema( ~~~~~~~~~~~~ src/person/schemas/person.schema.ts:23:14 - error TS4118: The type of this node cannot be serialized because its property ‘[toStringTag]’ cannot be serialized. 23 export const PersonSchema = new Schema( ~~~~~~~~~~~~ src/person/schemas/person.schema.ts:23:14 - error TS4118: The type of this node cannot be serialized because its property ‘[iterator]’ cannot be serialized. 23 export const PersonSchema = new Schema( ~~~~~~~~~~~~ src/person/schemas/person.schema.ts:23:14 - error TS4118: The type of this node cannot be serialized because its property ‘[species]’ cannot be serialized. 23 export const PersonSchema = new Schema( ~~~~~~~~~~~~ src/person/schemas/person.schema.ts:23:14 - error TS4118: The type of this node cannot be serialized because its property ‘[toStringTag]’ cannot be serialized. 23 export const PersonSchema = new Schema( ~~~~~~~~~~~~ Found 6 error(s).

Steps to Reproduce

Using typescript version 4.8.2 have the following schema and try build:

export const PersonSchema = new Schema(
    {
        information: InformationSchema
})

export const InformationSchema = new Schema({
  foo: { type: Schema.Types.ObjectId, ref: 'PersonModel' }
})

Expected Behavior

A successful build. Instead you get the errors mentioned above

[HiiiiD]

@piercy Can you try with this fix that I’ve made? https://github.com/HiiiiD/mongoose/tree/fix-path-types

[vkarpov15]

I can confirm this is an issue, and the issue is fixed by #12352. This will be fixed when we release 6.7.0.