从Node.js Express中的mongoDB中删除集合中的'note'

Question

I wonder how to delete a 'note' from my mongoDB in Node.js

I'm new to Node.js, Express and mongoDB.

I'll just show my code here and let that speak for it self...

notesController.js:

    app.delete('/api/notes/:categoryName/:note', 
   // auth.ensureApiAuthenticated, commented when testing.
     function(req, res) {

        var categoryName = req.params.categoryName;
        var note = req.params.note;

        data.removeNote(categoryName, note, function(err, notes){
            if(err) {
                res.send(400, err);
            }
            else {
                res.send(200);
            }
        });
    });

index.js from data folder:

     data.removeNote = function(categoryName, note, next) {
    database.getDb(function(err, db){
        if(err) {
            next(err);
        }
        else {
            db.notes.remove({ note: note }, function(err, results) {
                console.log(results); //not too sure what to do here?
                next();
            });
        }
    });
};

MongoDB: This is the note I'm trying to delete. Not Programming since that's the category.

{
  "name": "Programming",
  "notes": [
    {
      "note": "Fiddler Note",
      "color": "blue",
      "author": "oOMelon"
    }
  ]
}

I use Fiddler when testing and I get 200 as status code... But it doesn't get deleted from the DB. Please help! :)

Thanks in advance :)

Answer 1

I think instead of

...
db.notes.remove({ note: note }, function(err, results) {
    console.log(results); //not too sure what to do here?
    next();
});
...

you should rather use an update with $pull , ie something like this

...
db.notes.update({ "notes.note": note }, 
                { $pull: { notes: { note: note } } }, 
                function(err, results) {

    console.log(results); //not too sure what to do here?
    next();
});
...

see the following GIF which illustrates that for your sample document.
Of course you will have to make sure that note is correctly set from the request data.