Limiting Fields

Question 1

How do you send a request to limit the result fields from the URL?

Answer 1

URL?fields=attr,attr,attr

Question 2

How would you ensure a certain attribute is not returned from a query?

Answer 2

query.select(‘-attr’). i.e. add a negative sign in front of the attribute when querying for data

Question 3

How do you handle the request to limit fields in Mongoose?

Answer 3

1. const x = req.query.fields.split(‘,’).join(‘ ‘); query = query.select(x);