javascript - Mongoose Model Object behaves strangely

Question

I am using mongoose to get person data from database. This is the code i use:

return new Promise((resolve, reject) => {
    Person.findOne({}, (err, result) => {
      if(err) {
        reject(err);
      } else {
        console.log(result);
        console.log(result.firstname);
        console.log(result.githubLink);
        resolve(result);
      }
    });
  });

This is output from console.log(result)

{ _id: 593c35e6ed9581db3ef85d75,
firstname: 'MyName',
lastname: 'MyLastName',
jobtitle: 'Web Developer',
email: 'foo@example.com',
githubLink: 'https://github.com/myGithub' }

And this is result from console.log(result.firstname); and console.log(result.githubLink);

MyName
undefined

Is this promise somehow messing up with this result? It's really weird because logging only the result shows my github link and logging the link says undefined.

Answer 1

If you have fields present in your database object that are not actually present in the Schema defined for the model, then they will still "log" but you cannot access the values of the property normally.

In most cases you really want to define the item properly in your schema:

githubLink: String

Or you can access properties you deliberately do not want to define using the .get() method:

result.get('githubLink')