Rails Route 徐赫謙 

Rails Route Basic 

/posts/10 # match ‘/posts/:id’ => ‘posts#show’ 

@post = Post.find(10) redirect_to post_path(@post) redirect_to @post /posts/10 

RESTful 

resources :posts HTTP Verb Path action GET /posts index GET /posts/:id show GET /posts/new new GET /posts/:id/edit edit POST /posts create PUT /posts/:id update DELETE /posts/:id destroy 

resources :posts HTTP Verb Path action GET posts_path index GET post_path(:id) show GET new_post_path new GET edit_post_path(:id) edit POST posts_path create PUT post_path(:id) update DELETE post_path(:id) destroy 

resources :posts, :comments, :authors resources :posts resources :comments resources :authors Equivalent 

Singular Resources 

match ‘profile’ => ‘users#show’ 

resource :record HTTP Verb Path action GET /record show GET /record/new new GET /record/edit edit POST /record create PUT /record update DELETE /record destroy 

resource :record HTTP Verb Path action GET record_path show GET new_record_path new GET edit_record_path edit POST record_path create PUT record_path update DELETE record_path destroy 

posts_url # http://host:1234/posts record_url # http://host:4321/record Include host, port, prefix 

namespace :admin do resources :posts, :comments end Namespace 

class Admin::PostController < ApplicationController end For 

Namespace HTTP Verb Path action GET /admin/posts index GET /admin/posts/:id show GET /admin/posts/new new GET /admin/posts/:id/edit edit POST /admin/posts create PUT /admin/posts/:id update DELETE /admin/posts/:id destroy 

Namespace HTTP Verb Path action GET admin_posts_path index GET admin_post_path(:id) show GET new_admin_post_path new GET edit_admin_post_path(:id) edit POST admin_posts_path create PUT admin_post_path(:id) update DELETE admin_post_path(:id) destroy 

class Admin::PostController < ApplicationController end For 

scope ‘/admin’ do resources :posts, :comments end # or resources :posts, path: ‘/admin/posts’ without /admin ? 

scope module: ‘admin’ do resources :posts, :comments end # or resources :posts, module: ‘admin’ with /admin without Admin:: ? 

class PostsController < ApplicationController end For 

Path HTTP Verb Path action GET /admin/posts index GET /admin/posts/:id show GET /admin/posts/new new GET /admin/posts/:id/edit edit POST /admin/posts create PUT /admin/posts/:id update DELETE /admin/posts/:id destroy 

Named Helper HTTP Verb Path action GET posts_path index GET post_path(:id) show GET new_posts_path new GET edit_posts_path(:id) edit POST posts_path create PUT post_path(:id) update DELETE post_path(:id) destroy 

class Post < ActiveRecord::Base has_many :comments end class Comment < ActiveRecord::Base belongs_to :post end resources :posts do resources :comments end Nested Resources 

Path for Comments HTTP Verb Path action GET /posts/:post_id/comments index GET /posts/:post_id/comments/:id show GET /posts/:post_id/comments/new new GET /posts/:post_id/comments/:id/edit edit POST /posts/:post_id/comments create PUT /posts/:post_id/comments/:id update DELETE /posts/:post_id/comments/:id destroy 

Helper for Comments HTTP Verb Path action GET post_comments_path(:post_id) index GET post_comment_path(:post_id, :id) show GET new_post_comment_path(:post_id) new GET edit_post_comment_path(:post_id) edit POST post_comments_path(:post_id) create PUT post_comment_path(:post_id, :id) update DELETE post_comment_path(:post_id, :id) destroy 

redirect_to post_comment_path(@post, @comment) redirect_to url_for(@post, @comment) redirect_to [@post, @comment] Shortcut 

resources :posts do member do get ‘preview‘ end get ‘draft’, on: :collection end GET /posts/:id/preview preview_post_path(:id) Custom Actions