用nodejs和mongoose插入新条目的最佳实践是什么

Question

I have two models:

This is the first:

var CommentSchema = new Schema({
    title: {
        type: String
    },
    owner: {
        type: Schema.ObjectId,
        ref: 'User'
    }
});

This is the second:

var UserSchema = new Schema({
    name: {
        type: String
    },
    comments: [{
        type: Schema.ObjectId,
        ref: 'Comment'
    }]
});

There are really a lot of comments. So, i add the id of each comment in the array of comment of owner. The goal is to create a simple function like "list my comments". The comments are verry actually, i use this code to add new comment:

var comment = ...
comment.title = "title";
comment.owner = req.user
comment.save(function(err) {
    if (err)
        ...
    else {
        User.findOne({ _id: req.user._id }, function (err, tmpUser){
            tmpUser.comments.push(comment);
            tmpUser.save(function(err) {
                if (err)
                    ...
                else {
                    //END
                }
            });
        });
    }
}

How to optimise this code ? Is it possible to optimise directly the model ? Thank you !

Answer 1

Why not simply query the Comments collection? If you're worried about the performance when there are a lot of comments, you can (and should) index the owner field.

db.comments.ensureIndex( { owner: 1 } )

And then using mongoose:

Comment.find({ owner: req.user._id }, function(err, comments) {
  // do something with comments
});