Stylesheet Query String

How does Rails come up with the query string appended to the
stylesheet tag?

The API does not even show a query string being appended:

I thought it was a function of the file timestamp, but I have updated
the file and the querystring still hasn’t changed. I just don’t want
my users to have to refresh to force their browser to see the new


I never saw a reply to this post? Is my question hard or dumb? :slight_smile: