i\'m new to Ruby on Rails, app is running on local machine
local bundle works
however when i try to git push heroku master,
I had a similar problem. The issue is that Bundler is generating stubs. Rails 4 apps do not store stubs in the app's bin/ directory. In order to fix this problem you need to use the following commands:
$ bundle config --delete bin
Then you need to update the bin directory to use the new Rails 4 executables
$ rake rails:update:bin
Then add the new bin/ directory to your version control using:
$ git add bin
Commit the changes and push your code to Heroku