Check for Existing Document in Mongo

Question

I'm new to Mongo and am using Mongoose as an ORM.

For user registration, I'm using email as the unique. I want to check if the email is already in use, and if it's not, then do something (perhaps save, perhaps next registration step, etc).

Sorry for what seems like a simple questions, but I haven't found an answer for it.

Unless it's "upsert". Which means inserting the document, even if I'm not quite ready to...

Answer 1

Are you asking how to find a document?

db.users.findOne({email => '[email protected]'})

If it returns something, document exists. Otherwise, it doesn't.