Why not connecting to remote mongo on heroku server?

Question

MongoDB

mistake:

MongoNetworkError: failed to connect to server [localhost:27017] on first connect [MongoNetworkError: connect ECONNREFUSED 127.0.0.1:27017]

on the local everything is fine, I connect to the remote mlab database, on heroku an error is displayed.
*PS. I entered the path to the remote database with my hands, but still it refers to localhost, I watched on the heroku server that the path was the one that I specified.

Answer 1

replace localhost with the ip of the remote server.