heroku db:push showing invalid database url

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 abl开发者_JAVA百科e 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

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yes, make sure you are in the project root, I just ran into this problem as well

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You need to have a database.yml file in your config directory so it knows what database to push from.

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You can try to specify the db name, login and password using that format: heroku db:push postgres://username:password@localhost/myrailsdb

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

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Try:

heroku info

If you get anything other than something like this (assuming the app name is 'blah-blah-app-name-9897'):

=== blah-blah-app-name-9897
Addons:        PG Backups Basic, Shared Database 5MB
Database Size: 184k
Domain Name:   blah-blah-app-name-9897.herokuapp.com
Git URL:       git@heroku.com:blah-blah-app-name-9897.git
Owner:         owner_email@jmail.com
Repo Size:     9M
Slug Size:     30M
Stack:         cedar
Web URL:       http://blah-blah-app-name-9897.herokuapp.com/

Then something is wrong with your heroku setup.

Post the output of your heroku info here to see details.