How to use methods from base?

Question

Mongoose

I make a request to mongo, I use the construction

var cursor = regions.find({}).cursor();     
                         cursor.on('data', function(doc) {
                            console.log(doc['methods']);
                          });
                      return res.render('index', { q: '' });                                      }

Moreover, if you use instead of doc['methods'] -> doc['_id'] or doc['regionName'], the correct values ​​are displayed from the database, but when I access methods, it displays undifine. but they are also in the database. Most likely, I'm not addressing them correctly, but I just can't find the correct appeal in the documentation.