I'm using Rails v. 3.0.9 and have pushed the app to Heroku. When I view the custom Heroku domain I get the following message from Heroku:
"We're sorry, but something went wrong. We've been notified about this issue and we'll take a look at it shortly."
I run heroku logs and don't seem to get any error messages.  The only error I encounter with Heroku seems to be when I run heroku rake db:migrate with which I get the following in return:
rake aborted!
uninitialized constant Rake::DSL
Note: I'm new to Rails and to Heroku. I'm not quite understanding the difference between production and development environments. Do I need to be in production for Heroku to work? At the moment, I'm using localhost3000 to view my app. Thanks guys!
 
    