Ruby—在Heroku上部署Rails4

这里是 Heroku部署官方文档：

下面是部署的步骤：

建立仓库：

$ cd my_demo_name

$ git init

$ git add .

$ git commit -m "first commit"

检查git状态

$ git status

登录heroku

$ heroku login

// 输入 $ email: $ password:

$ heroku create my_demo_name

// 生成网址 http://my_demo_name.herokuapp.com

$ git push heroku master

可能出现问题：

Permission denied (publickey).

fatal: Could not read from remote repository.

解决方法：

// 生成 ssh 

$ ssh-keygen -t rsa

Generating public/private rsa key pair.

Enter file in which to save the key (/Users/mac/.ssh/id_rsa): /Users/mac/.ssh/id_rsa

Enter passphrase (empty for no passphrase): 

Enter same passphrase again: 

Your identification has been saved in /Users/mac/.ssh/id_rsa.

Your public key has been saved in /Users/mac/.ssh/id_rsa.pub.

// 并添加至 heroku

$ heroku keys:add

Found the following SSH public keys:

1) github_rsa.pub

2) id_rsa.pub

Which would you like to use with your Heroku account? id_rsa.pub

 !    Invalid choice

tindle:bootstrap-todo-app-master mac$ heroku keys:add

Found the following SSH public keys:

1) github_rsa.pub

2) id_rsa.pub

Which would you like to use with your Heroku account? 2

Uploading SSH public key /Users/mac/.ssh/id_rsa.pub... done

其他问题：

Heroku 数据库只支持 PostgreSQL, 所以要修改 Gemfile：

# gem 'sqlite3'
group :production do
  gem 'pg'
end        
group :development, :test do
  gem 'sqlite3'
end

// 修改完要安装更新

$ bundle

// 更新完成后可以用 git status

// 查看，Gemfile , Gemfile.lock都已修改

$ git add .

$ git commit -m "edit msg"

$ git push heroku master

// 最后，数据库迁移

$ heroku run rake db:create

$ heroku run rake db:migrate

至此，可以在浏览器打开你的网址了

补充问题：

 Rails 4的CSS 在 Heroku 上失效的解决方法

 http://stackoverflow.com/questions/16271696/cant-get-css-working-on-heroku-using-rails-4-with-bootstrap-saas-gem

在 /config/environments/production.rb 中设置：

config.cache_classes = true config.serve_static_assets = true config.assets.compile = true config.assets.digest = true

保证 /config/database.yml 中有：

production: adapter: postgresql encoding: unicode database: Your_appname_production

然后再 git add, git commit,


最后 git push 即可。