安装ruby

cd

git clone https://github.com/rbenv/rbenv.git ~/.rbenv

echo ‘export PATH="$HOME/.rbenv/bin:$PATH"‘ >> ~/.bashrc

echo ‘eval "$(rbenv init -)"‘ >> ~/.bashrc

exec $SHELL

git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build

echo ‘export PATH="$HOME/.rbenv/plugins/ruby-build/bin:$PATH"‘ >> ~/.bashrc

exec $SHELL

rbenv install 2.3.1

rbenv global 2.3.1

ruby -v

安装Bundler

gem install bundler

安装NodeJS

node -vcurl -sL https://deb.nodesource.com/setup_4.x | sudo -E bash -

sudo apt-get install -y nodejs

安装Rails

gem install rails -v 4.2.6

rbenv rehash

版本号可以通过tab提示获得最新版本号

第一个网站

使用SQLite3测试：

#### If you want to use SQLite (not recommended)

rails new myapp

#### If you want to use MySQL

rails new myapp -d mysql

#### If you want to use Postgres

# Note that this will expect a postgres user with the same username

# as your app, you may need to edit config/database.yml to match the

# user you created earlier

rails new myapp -d postgresql

# Move into the application directory

cd myapp

# If you setup MySQL or Postgres with a username/password, modify the

# config/database.yml file to contain the username/password that you specified

# Create the database

rake db:create

rails server

打开 http://localhost:3000 即看到封面。

第一个CRUD功能

rails generate scaffold Person first_name:string last_name:string phone_number:string address:text

rake db:migrate

rake db:migrate RAILS_ENV=production

现在打开 http://localhost:3000/people 即有一个人员管理CRUD页面。

Jruby下运行Rails

安装Java

先卸载openjdk：

yum -y remove java*

安装oracle jdk

sudo rpm -i jdk-8u112-linux-x64.rpm

安装Jruby

56 rbenv install --list

57 rbenv global jruby-9.1.5.0

58 jruby –v

修改Gemfile

去掉自动生成的：

gem ‘activerecord-jdbcsqlite3-adapter‘

在末尾增加：

platform :jruby do

gem ‘activerecord-jdbc-adapter‘, git: ‘https://github.com/jruby/activerecord-jdbc-adapter.git‘, branch: ‘rails-5‘

gem ‘activerecord-jdbcsqlite3-adapter‘, git: "https://github.com/jruby/activerecord-jdbc-adapter.git", branch: ‘rails-5‘

gem ‘listen‘

end

运行

bundle install

jruby –S rails server

Linux 下安装JRuby