Docs: Schema option 'autoCreate' default

https://mongoosejs.com/docs/guide.html#autoCreate says:

Before Mongoose builds indexes, it calls Model.createCollection() to create the underlying collection in MongoDB if autoCreate is set to true.

In our setup, we are using the defaults for this as well as autoIndex. I.e. we are using this: autoIndex: true (the default) autoCreate: false (the default)

Still when our mongoose code starts running and when e.g. db1.model('Proxy', proxySchema, 'proxy'); is called we can see this in the mongodb logs:

2021-12-16T18:16:17.245+0100 I STORAGE  [conn95] createCollection: db1.proxy with generated UUID: 434da758-b375-4195-ab14-47f519c49458
2021-12-16T18:16:17.600+0100 I INDEX    [conn95] build index on: db1.proxy properties: { v: 2, key: { time: -1 }, name: "time_-1", ns: "db1.mtasAlarms", background: true }

So from the logs, the collection is created. But the above text in the docs it should not be.

[karankumarslicepay]

Hi

If anyone still facing this issue, Please make sure that mongoose.set('autoIndex', false) and mongoose.set('autoCreate', false); should have been set before any schema creation

Example: This is incorrect. It will create the schema even if the flags are set as false

`

"use strict";

const mongoose = require("mongoose");
const { Schema } = mongoose;
mongoose.set("debug", true);

run().catch((err) => console.log(err));

async function run() {
    let schema = new Schema({ name: String });
    schema.index({ name: 1 });
    let Test = mongoose.model("Test", schema);
    mongoose.connect("mongodb://localhost:27017/test");
    mongoose.set("autoCreate", false);   // <<<<<----- not after mongoose.model
    mongoose.set("autoIndex", false);    // <<<<<----- not after mongoose.model
    mongoose.connection.on("connected", async function () {
        console.log("Mongoose default connection is open.");
        try {
            await Test.init();
            await Test.findOne();

            // Prints "[ { v: 2, key: { _id: 1 }, name: '_id_' } ]"
            console.log(await Test.collection.listIndexes().toArray());
        } catch (e) {
            console.error({ e });
        }
    });
    mongoose.connection.on("error", function (err) {
        console.log("Mongoose default connection has occurred " + err + " error");
    });
    mongoose.connection.on("disconnected", function () {
        console.log("Mongoose default connection is disconnected");
    });
}

setTimeout(() => {
    console.log("settimout");
}, 60000);

`

But this is correct: `

"use strict";

const mongoose = require("mongoose");
const { Schema } = mongoose;
mongoose.set("debug", true);
mongoose.set("autoCreate", false); // <<<<<----- correct, before mongoose.model
mongoose.set("autoIndex", false); // <<<<<----- correct, before mongoose.model
run().catch((err) => console.log(err));

async function run() {
    let schema = new Schema({ name: String });
    schema.index({ name: 1 });
    let Test = mongoose.model("Test", schema);
    mongoose.connect("mongodb://localhost:27017/test");
    mongoose.connection.on("connected", async function () {
        console.log("Mongoose default connection is open.");
        try {
            await Test.init();
            await Test.findOne();

            // Prints "[ { v: 2, key: { _id: 1 }, name: '_id_' } ]"
            console.log(await Test.collection.listIndexes().toArray());
        } catch (e) {
            console.error({ e });
        }
    });
    mongoose.connection.on("error", function (err) {
        console.log("Mongoose default connection has occurred " + err + " error");
    });
    mongoose.connection.on("disconnected", function () {
        console.log("Mongoose default connection is disconnected");
    });
}

setTimeout(() => {
    console.log("settimout");
}, 60000);

`

[vkarpov15]

@thernstig no, that isn’t intentional. We’ll take a look and see if we can repro that.