如何使用typescript扩展mongoose查询？

npm install mongoose typescript @types/mongoose --save

import { Schema, model, Document } from 'mongoose';

interface IUser extends Document {
  name: string;
  email: string;
  password: string;
}

const userSchema = new Schema<IUser>({
  name: { type: String, required: true },
  email: { type: String, required: true },
  password: { type: String, required: true },
});

const User = model<IUser>('User', userSchema);

export default User;

import { Model, DocumentQuery } from 'mongoose';

interface IUserModel extends Model<IUser> {
  findByEmail(email: string): DocumentQuery<IUser | null, IUser>;
}

userSchema.statics.findByEmail = function (email: string) {
  return this.findOne({ email });
};

const User = model<IUser, IUserModel>('User', userSchema);

User.findByEmail('example@example.com')
  .then((user) => {
    if (user) {
      console.log(user);
    } else {
      console.log('User not found');
    }
  })
  .catch((error) => {
    console.error(error);
  });