getter.js | The Promise based get object parameters functions | Reactive Programming library

The error was raised because I had a field called id that probably was overriding the internal _id field.

I resolved changing my schema in:

I don't know your exact error, but there are multiple things wrong with your code:

You're using incorrectly the promisified version of fs.writeFile, if an error occurs, the promise will be rejected, you won't get a resolved promise with an error as the resolved value, which is what you're doing. Use path.join instead of concatenating paths.

In startSurvey, you're using console.log(questions) but that wont have any data if questions.json doesn't exists, which should happen the first time you run the program, since it's filled by saveForm, so you probably want to return the questions in saveForm

So saveForm should look something like this: