In mongodb, is it possible to sort by part of a field (string)?

Question

MongoDB

The database contains the strings "yyyy-mm-dd hh:ii:ss", you need to sort by part of the string "yyyy-mm-dd". Can I somehow use the substr operator in sorting?

Answer 1

db.collection.find(query).toArray.sort(customSortFunction)

At the same time, it should be taken into account that this is a normal sorting using js tools, so indexes will not be used.