Heroku: No Rakefile found (but works locally) - ruby-on-rails

Question

I cloned one of my own apps using Rails 3.1.3, created an app on Heroku on stack cedar, pushed the to Heroku, and then tried to run
heroku run rake db:migrate and got this error message
No Rakefile found (looking for: rakefile, Rakefile, rakefile.rb, Rakefile.rb)
/usr/local/lib/ruby/1.9.1/rake.rb:2367:in `raw_load_rakefile'
/usr/local/lib/ruby/1.9.1/rake.rb:2007:in `block in load_rakefile'
/usr/local/lib/ruby/1.9.1/rake.rb:2058:in `standard_exception_handling'
/usr/local/lib/ruby/1.9.1/rake.rb:2006:in `load_rakefile'
/usr/local/lib/ruby/1.9.1/rake.rb:1991:in `run'
/usr/local/bin/rake:31:in `<main>
I am in the root of the app when I run rake db:migrate. The app works on localhost.
Any ideas what I might be doing wrong?
The only thing I note that seems odd is that, in the error message, it's referring to ruby/1.9.1/
However, I created the app using rvm with ruby 1.9.2 and when I do ruby -v
ruby -v
ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-darwin10.8.0]
My Gemfile
source 'http://rubygems.org'
gem 'rails', '3.1.3'
# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'
group :development, :test do
gem 'sqlite3'
end
group :production do
gem 'pg'
end
group :production do
gem 'thin'
end
gem "heroku"
gem 'omniauth-facebook'
gem 'omniauth'
# Gems used only for assets and not required
# in production environments by default.
group :assets do
gem 'sass-rails', '~> 3.1.5'
gem 'coffee-rails', '~> 3.1.1'
gem 'uglifier', '>= 1.0.3'
end
gem "rmagick"
gem "carrierwave"
gem 'fog'
gem 'simple_form'
gem 'devise'
gem 'jquery-rails'
# To use ActiveModel has_secure_password
# gem 'bcrypt-ruby', '~> 3.0.0'
# Use unicorn as the web server
# gem 'unicorn'
# Deploy with Capistrano
# gem 'capistrano'
# To use debugger
# gem 'ruby-debug19', :require => 'ruby-debug'
group :test do
# Pretty printed test output
gem 'turn', '0.8.2', :require => false
end
my gitignore file
# See http://help.github.com/ignore-files/ for more about ignoring files.
#
# If you find yourself ignoring temporary files generated by your text editor
# or operating system, you probably want to add a global ignore instead:
# git config --global core.excludesfile ~/.gitignore_global
# Ignore bundler config
/.bundle
# Ignore the default SQLite database.
/db/*.sqlite3
# Ignore all logfiles and tempfiles.
/log/*.log
/tmp

Answer 1

You have to push to the master branch. From looking at the comments above it looks like you are not doing this.
Therefore, assuming you're developing your application in the master branch, you can deploy with a simple:
git push heroku master
If you're not developing on master deploy with:
git push heroku your_branch_name:master
replacing your_branch_name with the name of the branch you're using.

Answer 2

So i had my staging branch already clone and ready for deployment
I added a remote for heroku app
heroku git:remote -a heroku-webapp-name-here
Then i was trying to do something like this: (and wasnt working)
git push heroku staging
Finally running this worked liked a charm:
git push heroku staging:master
The problem is that if you look in the heroku dashboard you will see that the heroku app is not ruby

Answer 3

Actually your master branch or whicher branch you're pushing did not get pushed to heroku, that's why it says no Rakefile.
Most likely... I think when you created your heroku app with heroku CLI in your terminal and you probably did not indicate which stack of heroku you want to use. See they have several stacks. I think cedar-14, heroku-16, heroku-18 and heroku-20.
So depending on your ruby version. You should find out if the ruby version of your rails app is found in the above heroku stacks. You will need change the stack by doing this in your terminal.
Say for example your ruby version is present in cedar-14. You don't need to delete your app and recreate a new one. You can just change the stack from the heroku cli like this.
heroku stack:set cedar-14
for future apps better specify the heroku stack. For example, like this:
heroku create --stack cedar-14
Then rename your app
heroku rename myapp
Again if Heroku can't find your rakefile is because nothing was pushed to heroku.