ruby-on-rails – Heroku：没有找到Rakefile(但在本地工作)

heroku运行rake db：migrate并得到此错误消息

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>

当我运行rake db：migrate时,我在应用程序的根目录.该应用程序在本地主机上工作.

任何想法我可能做错了什么？

我唯一注意到,似乎奇怪的是,在错误消息中,它指的是ruby / 1.9.1 /

但是,我创建了使用rvm与ruby 1.9.2的应用程序,当我做ruby -v

ruby -v
ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-darwin10.8.0]

我的宝石

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

我的gitignore文件

# 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