[Bug] Enum casting broken for numeric typescript enums

[mjfwebb]

Prerequisites

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

Mongoose version

9.0.1

Node.js version

x

MongoDB server version

x

Typescript version (if applicable)

5.9.3

Description

Works in 8x, and 9.0.0.

Fairly sure this is related to #15824

Given this setup:

enum MyEnum {
  Hello = 0,
  GoodBye,
}

myEnumProperty: { type: Number, enum: MyEnum, required: true, default: 0 },

Getting an error like this:

Cast to Number failed for value "Hello" (type string) at path "myEnumProperty"

Steps to Reproduce

Schema with something like this:

import mongoose, { Schema } from 'mongoose';

enum MyEnum {
  Hello = 0,
  GoodBye,
}

const schema = new Schema<User>({
  name: { type: String, required: true },
  email: { type: String, required: true },
  myEnumProperty: { type: Number, enum: MyEnum, required: true, default: 0 },
  avatar: String,
});

interface User {
  name: string;
  email: string;
  avatar?: string;
}

const UserModel = mongoose.model<User>('User', schema);

const doc = new UserModel({ name: 'test', email: 'test', myEnumProperty: MyEnum.GoodBye });

Expected Behavior

No errors

[mjfwebb]

The issue is here:

mongoose/lib/schema/number.js

Lines 337 to 339 in 4c13300

	if (utils.isPOJO(values)) {
	values = Object.values(values);
	}