How to make a unique slug for a page?

Question

MongoDB

I'm trying to make an application on node.js. I was puzzled by the creation of beautiful url.
Now they look like this
localhost/item/574aac2fc4621ec02f12c301
I would like to do something like this
localhost/item/pervia-page
That is, now the id from mongodb is being substituted.
When added to the database, json arrives with a certain number of elements, and it can contain elements with the same name, and the database can also have such names, but everyone has different characteristics. I think you need to add a number to the end of the same slugs so that they differ. How to check that there are no identical slugs?

Answer 1

Generate a slug based on some criterion (title or something else, it doesn't matter) and see if it is in the database.
Your K.O.

Answer 2

How to check that there are no identical slugs?

Make a unique index on this field and there will be no duplicates.