Rails路由学习

一般路由

get  'meetings/:id', :to => 'events#show'
post 'meetings', :to =>'events#create'

events_controller的show和create action
简写

get 'meetings/:id' => 'events#show'

其中:id会被转车一个参数params[:id]传到Controller里。

match路由

match  ':controller(/:action(/:id(.:format)))', :via => :all

括号内的内容表示可有可无的内容

match '/:controller', via: :all
match '/:controller/:action', via: :all
match '/:controller/:action/:id', via: :all
match '/:controller.:format', via: :all
match '/:controller/:action.:format', via: :all
match '/:controller/:action/:id.:format', via: :all

match '/test_match/:action'=> 'test_match#:action' ,:via => :all

.format让路由可以接受.json、.xml参数，并且转成params[:format]参数中。

命名路由

get '/meetings' => 'events#index', :as => 'meetings'

其中的:as部分会产生meetings_path和meeting_url的Helpers，_path是相对路径，_url是绝对路径。

路由重定向

get '/foo' => redirect('/bar')
get "/ihower" => redirect("http://ihower.tw")

设置首页

root :to => 'welcome#show'

限定动词

match 'account/overview' => 'account#overview', :via=> :get
match 'account/setup' => 'account#setup', :via => [:get, :post]
match 'account/overview' => 'account#overview', :via => :all

scope规则

scope :controller => 'events', :path => '/foo', :as=>'bar' do
  get 'meetings/:id' => :show, :as =>'meeting'
  post 'meetings' => :create, :as=>'meerings'
end

产生bar_meeting_url和bar_meetings_url。

Namespace

namespace :admin do
  resources :projects
end

controller对应Admin::ProjectsController,网址为/admin/projects，而URL Helper如admin_projects_path。
每个Namespace都可以设置首页

namespace :admin do
  root 'projects#index'
end

这样连接/admin的时候就默认使用ProjectsController的index方法。

限定条件

限制:id是整数

match '/events/show/:id' => 'events#show', :constraints => {:id => /\d/}

甚至可以限定IP位置

constraints(:ip => /(^127.0.0.1$)|(^192.168.[0-9]{1,3}.[0-9]{1,3}$)/) do
    match "/events/show/:id" => "events#show"
end

自定义集合路由

resources :products do
  collection do
    get :sold
    post :on_offer
  end
end

产生sold_products_path和on_offer_products_path这两个URL Helper，产生出如products/sold和products/on_off

限定路由

resources :events, :except => [:index, :show]
resources :events, :only => :create