Mongoose findOneAndUpdate Updating Multiple Fields

Question

The findOneAndUpdate method doesn't work properly. I'm trying to update all the fields all at once but it's only updating (setting) the last field. It's always only the last field. Can someone tell me what I'm doing wrong or what can I do to have the expected effect?

This is my findOneAndUpdate code:

Book.findOneAndUpdate({_id:bookId},{$set:{"name": name},$set:{"genre": genre},$set:{"author": author},$set:{"similar": similar}}).exec(function(err, book){
       if(err){
           console.log(err);
           res.status(500).send(err);
       } else {
            res.status(200).send(book);
       }
});

Answer 1

You are using the $set operator multiple times. The correct syntax for $set is :

{ $set: { <field1>: <value1>, ... } }

You need to change your update argument like this:

Book.findOneAndUpdate({ "_id": bookId }, { "$set": { "name": name, "genre": genre, "author": author, "similar": similar}}).exec(function(err, book){
   if(err) {
       console.log(err);
       res.status(500).send(err);
   } else {
            res.status(200).send(book);
   }
});