Typescript module augmentation error: Generic type requires 2 type arguments

Question

I'm trying to replace original type with module augmentation:

Original:

export declare type DocumentType<T> = (T extends Base<any> ? Omit<mongoose.Document, '_id'> & T : mongoose.Document & T) & IObjectWithTypegooseFunction;

My local index.d.ts:

import '@typegoose/typegoose';
import { Base } from '@typegoose/typegoose/lib/defaultClasses';
import mongoose from 'mongoose';
import { IObjectWithTypegooseFunction } from '@typegoose/typegoose/lib/types';

declare module '@typegoose/typegoose' {
  // just copy-paste from original
  type DocumentType<T> = (T extends Base<any>
    ? Omit<mongoose.Document, '_id'> & T
    : mongoose.Document & T) &
    IObjectWithTypegooseFunction;
}

And finally I got an error:

// TS2314: Generic type 'DocumentType' requires 2 type argument(s).
interface User extends DocumentType<UserDocument> {}

What am I doing wrong? Obviously there's only one generic type in DocumenType<T>. Why does it complain about second type?

Answer 1

等待大神解答