heroku db:push showing invalid database url

Question

I am trying to push data to a heroku app by using

heroku db:push

but it is spitting out this error:

root@ubuntu-lappy:~/rails/soft$ heroku db:push 
Invalid database url

any clue regarding this? my taps installation went fine because I was able to push the DB out before.

Is there something in particular I should be looking at?

EDIT: If you are looking for answer to this problem then you are better off providing the freaking URL yourself. Answered in this question

Answer 1

If you are in the /db directory rather than at the root of your Rails app, you can get this error