Cannot fork an older heroku app

Question

I have a ruby on rails app on heroku that I wanted to make some updates to. I was hoping to fork the app and test my changes on a new staging clone before I update the live site.

When I try the command:

heroku fork -a source-app new-staging-app

I get the error:

!    'fork' is not a heroku command.

And when I use "heroku help", fork does not appear as one of the choices.

When I'm signed in to another account and working on a more recent app, the fork command is available as a command.

The app I'm trying to fork is on the cedar stack and it's currently using rails 3.2.11.

Any idea why 'fork' might not be available with this app?

Answer 1

“ fork”命令已于2013年添加到heroku工具栏中。在有问题的帐户上安装最新版本的heroku工具栏，以便能够使用fork功能： https ://toolbelt.heroku.com