aboutsummaryrefslogtreecommitdiffstats
path: root/actionpack/lib/action_dispatch/routing.rb
blob: 7182ae201c2f8f075283f686f134709403df1b37 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
module ActionDispatch
  # The routing module provides URL rewriting in native Ruby. It's a way to
  # redirect incoming requests to controllers and actions. This replaces
  # mod_rewrite rules. Best of all, Rails' \Routing works with any web server.
  # Routes are defined in <tt>config/routes.rb</tt>.
  #
  # Think of creating routes as drawing a map for your requests. The map tells
  # them where to go based on some predefined pattern:
  #
  #   Rails.application.routes.draw do
  #     Pattern 1 tells some request to go to one place
  #     Pattern 2 tell them to go to another
  #     ...
  #   end
  #
  # The following symbols are special:
  #
  #   :controller maps to your controller name
  #   :action     maps to an action with your controllers
  #
  # Other names simply map to a parameter as in the case of <tt>:id</tt>.
  #
  # == Resources
  #
  # Resource routing allows you to quickly declare all of the common routes
  # for a given resourceful controller. Instead of declaring separate routes
  # for your +index+, +show+, +new+, +edit+, +create+, +update+ and +destroy+
  # actions, a resourceful route declares them in a single line of code:
  #
  #  resources :photos
  #
  # Sometimes, you have a resource that clients always look up without
  # referencing an ID. A common example, /profile always shows the profile of
  # the currently logged in user. In this case, you can use a singular resource
  # to map /profile (rather than /profile/:id) to the show action.
  #
  #  resource :profile
  #
  # It's common to have resources that are logically children of other
  # resources:
  #
  #   resources :magazines do
  #     resources :ads
  #   end
  #
  # You may wish to organize groups of controllers under a namespace. Most
  # commonly, you might group a number of administrative controllers under
  # an +admin+ namespace. You would place these controllers under the
  # <tt>app/controllers/admin</tt> directory, and you can group them together
  # in your router:
  #
  #   namespace "admin" do
  #     resources :posts, :comments
  #   end
  #
  # Alternately, you can add prefixes to your path without using a separate
  # directory by using +scope+. +scope+ takes additional options which
  # apply to all enclosed routes.
  #
  #   scope path: "/cpanel", as: 'admin' do
  #     resources :posts, :comments
  #   end
  #
  # For more, see <tt>Routing::Mapper::Resources#resources</tt>,
  # <tt>Routing::Mapper::Scoping#namespace</tt>, and
  # <tt>Routing::Mapper::Scoping#scope</tt>.
  #
  # == Non-resourceful routes
  #
  # For routes that don't fit the <tt>resources</tt> mold, you can use the HTTP helper
  # methods <tt>get</tt>, <tt>post</tt>, <tt>patch</tt>, <tt>put</tt> and <tt>delete</tt>.
  #
  #   get 'post/:id' => 'posts#show'
  #   post 'post/:id' => 'posts#create_comment'
  #
  # If your route needs to respond to more than one HTTP method (or all methods) then using the
  # <tt>:via</tt> option on <tt>match</tt> is preferable.
  #
  #   match 'post/:id' => 'posts#show', via: [:get, :post]
  #
  # Now, if you POST to <tt>/posts/:id</tt>, it will route to the <tt>create_comment</tt> action. A GET on the same
  # URL will route to the <tt>show</tt> action.
  #
  # == Named routes
  #
  # Routes can be named by passing an <tt>:as</tt> option,
  # allowing for easy reference within your source as +name_of_route_url+
  # for the full URL and +name_of_route_path+ for the URI path.
  #
  # Example:
  #
  #   # In routes.rb
  #   get '/login' => 'accounts#login', as: 'login'
  #
  #   # With render, redirect_to, tests, etc.
  #   redirect_to login_url
  #
  # Arguments can be passed as well.
  #
  #   redirect_to show_item_path(id: 25)
  #
  # Use <tt>root</tt> as a shorthand to name a route for the root path "/".
  #
  #   # In routes.rb
  #   root to: 'blogs#index'
  #
  #   # would recognize http://www.example.com/ as
  #   params = { controller: 'blogs', action: 'index' }
  #
  #   # and provide these named routes
  #   root_url   # => 'http://www.example.com/'
  #   root_path  # => '/'
  #
  # Note: when using +controller+, the route is simply named after the
  # method you call on the block parameter rather than map.
  #
  #   # In routes.rb
  #   controller :blog do
  #     get 'blog/show'     => :list
  #     get 'blog/delete'   => :delete
  #     get 'blog/edit/:id' => :edit
  #   end
  #
  #   # provides named routes for show, delete, and edit
  #   link_to @article.title, show_path(id: @article.id)
  #
  # == Pretty URLs
  #
  # Routes can generate pretty URLs. For example:
  #
  #   get '/articles/:year/:month/:day' => 'articles#find_by_id', constraints: {
  #     year:       /\d{4}/,
  #     month:      /\d{1,2}/,
  #     day:        /\d{1,2}/
  #   }
  #
  # Using the route above, the URL "http://localhost:3000/articles/2005/11/06"
  # maps to
  #
  #   params = {year: '2005', month: '11', day: '06'}
  #
  # == Regular Expressions and parameters
  # You can specify a regular expression to define a format for a parameter.
  #
  #   controller 'geocode' do
  #     get 'geocode/:postalcode' => :show, constraints: {
  #       postalcode: /\d{5}(-\d{4})?/
  #     }
  #
  # Constraints can include the 'ignorecase' and 'extended syntax' regular
  # expression modifiers:
  #
  #   controller 'geocode' do
  #     get 'geocode/:postalcode' => :show, constraints: {
  #       postalcode: /hx\d\d\s\d[a-z]{2}/i
  #     }
  #   end
  #
  #   controller 'geocode' do
  #     get 'geocode/:postalcode' => :show, constraints: {
  #       postalcode: /# Postcode format
  #          \d{5} #Prefix
  #          (-\d{4})? #Suffix
  #          /x
  #     }
  #   end
  #
  # Using the multiline modifier will raise an +ArgumentError+.
  # Encoding regular expression modifiers are silently ignored. The
  # match will always use the default encoding or ASCII.
  #
  # == External redirects
  #
  # You can redirect any path to another path using the redirect helper in your router:
  #
  #   get "/stories" => redirect("/posts")
  #
  # == Unicode character routes
  #
  # You can specify unicode character routes in your router:
  #
  #   get "こんにちは" => "welcome#index"
  #
  # == Routing to Rack Applications
  #
  # Instead of a String, like <tt>posts#index</tt>, which corresponds to the
  # index action in the PostsController, you can specify any Rack application
  # as the endpoint for a matcher:
  #
  #   get "/application.js" => Sprockets
  #
  # == Reloading routes
  #
  # You can reload routes if you feel you must:
  #
  #   Rails.application.reload_routes!
  #
  # This will clear all named routes and reload routes.rb if the file has been modified from
  # last load. To absolutely force reloading, use <tt>reload!</tt>.
  #
  # == Testing Routes
  #
  # The two main methods for testing your routes:
  #
  # === +assert_routing+
  #
  #   def test_movie_route_properly_splits
  #    opts = {controller: "plugin", action: "checkout", id: "2"}
  #    assert_routing "plugin/checkout/2", opts
  #   end
  #
  # +assert_routing+ lets you test whether or not the route properly resolves into options.
  #
  # === +assert_recognizes+
  #
  #   def test_route_has_options
  #    opts = {controller: "plugin", action: "show", id: "12"}
  #    assert_recognizes opts, "/plugins/show/12"
  #   end
  #
  # Note the subtle difference between the two: +assert_routing+ tests that
  # a URL fits options while +assert_recognizes+ tests that a URL
  # breaks into parameters properly.
  #
  # In tests you can simply pass the URL or named route to +get+ or +post+.
  #
  #   def send_to_jail
  #     get '/jail'
  #     assert_response :success
  #   end
  #
  #   def goes_to_login
  #     get login_url
  #     #...
  #   end
  #
  # == View a list of all your routes
  #
  #   rake routes
  #
  # Target specific controllers by prefixing the command with <tt>CONTROLLER=x</tt>.
  #
  module Routing
    extend ActiveSupport::Autoload

    autoload :Mapper
    autoload :RouteSet
    autoload :RoutesProxy
    autoload :UrlFor
    autoload :PolymorphicRoutes

    SEPARATORS = %w( / . ? ) #:nodoc:
    HTTP_METHODS = [:get, :head, :post, :patch, :put, :delete, :options] #:nodoc:
  end
end