ruby环境安装草稿

安装 homebrew
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

brew search
brew install nginx

install rails under vpn
http://blog.csdn.net/xunyn/article/details/17069521
https://ruby-china.org/wiki/install_ruby_guide
http://stackoverflow.com/questions/15514865/brew-update-errors

install rvm
https://ruby-china.org/wiki/install_ruby_guide
install ruby under vpn
if ruby -v == 2.1.1
rvm system --default
else
rvm install 2.1.1 #under vpn
rvm 2.1.1 --default

bundle install # install all in gemfile

if error
brew install mysql
mysqld

cp database.yml.example database.yml
vim config/database.yml
rake db:create:all
rake db:migrate
rails s

rake -T| grep seed
执行所有seek命令.

rake assets:precompile RAILS_ENV=production

如果使用 system ruby 则 gem安装于 ~/.gem文件夹下面
如果使用 rvm安装ruby 则 gem安装于 ~/.rvm/.gem下面

rails也是一个gem

1. rails s 命令行可以展示每个请求的请求模块和profile信息.

请求主页. 首先访问: routes.rb

root ‘home#index‘
resources :roles

路由至: home_controller.rb

skip_before_filter :authenticate_user! // 跳过用户认证
skip_authorization_check // 跳过用户认证
before_action :redirect_to_login_if_in_subdomain // 如果是二级域名, 跳转到登陆界面

def index
end

index函数为空, 直接查找 views/layouts/home.html.erb -> views/home

不同action 根据action 来做一些样式的改变.

http://localhost:3000/login

请求登陆界面: routes.rb

get "/login" => "sessions#new"

devise.sessions_controller

prepend_before_filter :require_no_authentication, only: [ :new, :create ]
prepend_before_filter :allow_params_authentication!, only: :create
prepend_before_filter only: [ :create, :destroy ] { request.env["devise.skip_timeout"] = true }

# GET /resource/sign_in
def new
self.resource = resource_class.new(sign_in_params)
clean_up_passwords(resource)
respond_with(resource, serialize_options(resource))
end