What does populate do in Mongoose?
Model answer
populate replaces a stored reference id with the referenced document at query time: Post.find().populate('author', 'name'). Select only needed fields. It runs extra queries behind the scenes, so it is not a database join and can be slow on large sets.
Learn this topic
Connect Express to MongoDB with Mongoose in the course MERN Stack Full Course: MongoDB, Express, React and Node.js.
Sign in to add your own answer.