is createCollection in mongoose idempotent?

[kasir-barati]

Hye guys, I was thinking if I call this method every time my app restarts, will that cause any issue? In my local env where I have a dockerized MongoDB instance with some existing documents in each collection it does not seem like it is destroying the existing collection and recreating it again. It is somewhat similar to CREATE TABLE IF NOT EXISTS in SQL.

[kasir-barati]

As you can see here it looks or at least logs are indicating that: https://github.com/kasir-barati/nestjs-materials/blob/916a35b80aec30a59448f1a8507084acf5eb3d74/mongoose/documentdb-index-creation/src/app/services/index.service.ts

[vkarpov15]

createCollection() is idempotent. Mongoose does send createCollection() on mongoose.connect() for all models by default, you can disable that with mongoose.set('autoCreate', false).

[kasir-barati]

So in short it is a 1:1 map of the MongoDB API: https://www.mongodb.com/docs/manual/reference/method/db.createcollection/

Right?

[vkarpov15]

I'm sorry, what is a 1:1 map of the MongoDB API?