model.createCollection fails for capped collection when using capped: number

[mhassan1]

Do you want to request a feature or report a bug?

Report a bug

What is the current behavior?

Calling model.createCollection for a model that specifies capped: number throws an error: MongoServerError: the 'size' field is required when 'capped' is true. Specifying capped: { size: number } instead throws no error.

If the current behavior is a bug, please provide the steps to reproduce.

await mongoose.model('thing', new mongoose.Schema({ name: String }, { capped: 100 })).createCollection()
// -> MongoServerError: the 'size' field is required when 'capped' is true

await mongoose.model('thing', new mongoose.Schema({ name: String }, { capped: { size: 100 } })).createCollection()
// -> no error

It seems like the logic at

mongoose/lib/model.js

Line 1370 in c5893fa

options = Object.assign({ capped: true }, capped, options);

does not properly account for the capped: number scenario.

What is the expected behavior?

No error is thrown

What are the versions of Node.js, Mongoose and MongoDB you are using? Note that "latest" is not a version.

node: 16.14.0
mongoose: 6.2.4
mongodb: 4.4

[IslandRhythms]

const mongoose = require('mongoose');

const failSchema = new mongoose.Schema({
    name: String
}, {capped: 100});

const passSchema = new mongoose.Schema({
    name: String,
}, {capped: {size: 100}})

async function run() {
    await mongoose.connect('mongodb://localhost:27017');
    await mongoose.connection.dropDatabase();
    await mongoose.model('thing', failSchema).createCollection();
}

run();