How to properly update an array in mongodb?

Question

MongoDB

I have a document like:

{
    _id: 1,
    comments: [
        {
            user: 1,
            comment: 'Hello!'
        },
        {
            user: 2,
            comment: 'Test'
        }
    ]
}

How can I update this document by adding another object to the comments array?
I also wanted to ask about findAndModify and Update, do I understand correctly that the main difference is that update does not return the modified document, or are there any other important differences between these two methods?

Answer 1

https://docs.mongodb.com/manual/reference/operator...