Document.modelName type definition is string, but get undefined at runtime

[shouchechengadv]

Prerequisites

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

Mongoose version

6.7.0

Node.js version

18.12.0

MongoDB server version

4.4.17

Typescript version (if applicable)

4.8.4

Description

Document.modelName type definition is string, but get undefined at runtime

Steps to Reproduce

Typescript Code

const Model = mongoose.model('Test', new Schema());

const doc = new Model();
console.log('doc.modelName', doc.modelName);

Output

doc.modelName undefined

Type Definition

class Document<T = any, TQueryHelpers = any, DocType = any> {
    /** The name of the model */
    modelName: string;
}

Expected Behavior

Remove Document.modelName type definition