Ruby on Rails App Heroku部署问题

Question

我在启动Heroku应用程序时遇到问题。我目前在Ruby on Rails教程第1章工作，我得到以下错误:

 1. remote:  remote: -----> Ruby app detected remote: -----> Compiling
    Ruby/Rails remote: -----> Using Ruby version: ruby-2.0.0 remote:
    -----> Installing dependencies using bundler 1.9.7 remote:        Running: bundle install --without development:test --path
    vendor/bundle --binstubs vendor/bundle/bin -j4 --deployment remote: 
    You are trying to install in deployment mode after changing remote: 
    your Gemfile. Run `bundle install` elsewhere and add the remote:    
    updated Gemfile.lock to version control. remote:        You have
    added to the Gemfile: remote:        * pg (= 0.17.1) remote:       
    * rails_12factor (= 0.0.2) remote:        Bundler Output: You are trying to install in deployment mode after changing remote:       
    your Gemfile. Run `bundle install` elsewhere and add the remote:    
    updated Gemfile.lock to version control. remote:         remote:    
    You have added to the Gemfile: remote:        * pg (= 0.17.1)
    remote:        * rails_12factor (= 0.0.2) remote:  ! remote:  !    
    Failed to install gems via Bundler. remote:  ! remote:  remote:  !  
    Push rejected, failed to compile Ruby app remote:  remote: Verifying
    deploy... remote:  remote: !       Push rejected to stark-dusk-2366.

我是一个新手，不太了解文件结构或我应该使用的命令来解决这个问题。

Answer 1

是否按照错误提示运行bundle install ?发生了什么事?另外，看一看Heroku关于设置Rails的指南，它对我帮助很大。