gem 'rails','3.1.1'

group :production do
  gem 'pg'
end        

group :development,:test do
  gem 'sqlite3'
end

我也运行捆绑安装,以更新我的Gemfile.lock.

当我推到英雄我仍然会得到以下错误：

!
 !     Failed to install gems via Bundler.
 !     
 !     Detected sqlite3 gem which is not supported on Heroku.
 !     http://devcenter.heroku.com/articles/how-do-i-use-sqlite3-for-development
 !
 !     Heroku push rejected,Failed to compile Ruby/rails app

我失踪了什么