Heroku Bundle Error (Rails App) - ruby-on-rails

Question

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, this is the error i get:
remote:
remote: -----> Ruby/Rails app detected
remote: -----> Using Ruby version: ruby-1.9.3
remote: -----> Installing dependencies using
remote: Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin --deployment
remote: /usr/bin/env: ruby1.9.1: No such file or directory
remote: !
remote: ! Failed to install gems via Bundler.
remote: !
remote: ! Heroku push rejected, failed to compile Ruby/rails app
remote:
my gemfile:
source 'http://rubygems.org'
ruby '1.9.3'
gem 'rails', '4.0.0.beta1'
group :development, :test do
gem 'sqlite3'
gem 'rspec-rails'
end
group :assets do
gem 'sass-rails', '~> 4.0.0.beta1'
gem 'coffee-rails', '~> 4.0.0.beta1'
gem 'therubyracer', platforms: :ruby
gem 'uglifier', '>= 1.0.3'
end
gem 'jquery-rails'
gem 'turbolinks'
gem 'jbuilder', '~> 1.0.1'
group :test do
gem 'capybara'
end
group :production do
gem 'pg'
end
what am i missing? thanks in advance!

Answer 1

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

Answer 2

the issue is with your ruby PATH. so first see what happens when you run
$ heroku run "ruby -v"
Running `ruby -v` attached to terminal... up, run.8734
ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-linux]
Do you get similar output? If not, then check your path.
$ heroku config -s | grep PATH
GEM_PATH=vendor/bundle/ruby/1.9.1
PATH=bin:vendor/bundle/ruby/1.9.1/bin:/usr/local/bin:/usr/bin:/bin
notice, how bin is in the path. in case its missing from yours, you can manually set PATH and add the bin by following command.
$ heroku config:set PATH=bin:vendor/bundle/ruby/1.9.1/bin:/usr/local/bin:/usr/bin:/bin