match

Matches a url pattern to one or more routes.

You should not use the `match` method in your router without specifying an HTTP method.

If you want to expose your action to both GET and POST, use:

# sets :controller, :action and :id in params
match ':controller/:action/:id', via: [:get, :post]

Note that :controller, :action, :id are interpreted as url query parameters and thus available as params in an action.

If you want to expose your action to GET, use `get` in the router:

Instead of:

match ":controller/:action/:id"

Do:

get ":controller/:action/:id"

Two of these symbols are special, :controller maps to the controller and :action to the controller's action. A pattern can also map wildcard segments (globs) to params:

get 'songs/*category/:title', to: 'songs#show'

# 'songs/rock/classic/stairway-to-heaven' sets
#  params[:category] = 'rock/classic'
#  params[:title] = 'stairway-to-heaven'

When a pattern points to an internal route, the route's :action and :controller should be set in options or hash shorthand. Examples:

match 'photos/:id' => 'photos#show', via: [:get]
match 'photos/:id', to: 'photos#show', via: [:get]
match 'photos/:id', controller: 'photos', action: 'show', via: [:get]

A pattern can also point to a Rack endpoint i.e. anything that responds to call:

match 'photos/:id', to: lambda {|hash| [200, {}, ["Coming soon"]] }, via: [:get]
match 'photos/:id', to: PhotoRackApp, via: [:get]
# Yes, controller actions are just rack endpoints
match 'photos/:id', to: PhotosController.action(:show), via: [:get]

Because requesting various HTTP verbs with a single action has security implications, you must either specify the actions in the via options or use one of the HtttpHelpers instead match

Options

Any options not seen here are passed on as params with the url.

:controller

The route's controller.

:action

The route's action.

:param

Overrides the default resource identifier `:id` (name of the dynamic segment used to generate the routes). You can access that segment from your controller using params[<:param>].

:path

The path prefix for the routes.

:module

The namespace for :controller.

match 'path', to: 'c#a', module: 'sekret', controller: 'posts', via: [:get]
# => Sekret::PostsController

See Scoping#namespace for its scope equivalent.

:as

The name used to generate routing helpers.

:via

Allowed HTTP verb(s) for route.

match 'path', to: 'c#a', via: :get
match 'path', to: 'c#a', via: [:get, :post]
match 'path', to: 'c#a', via: :all

:to

Points to a Rack endpoint. Can be an object that responds to call or a string representing a controller's action.

match 'path', to: 'controller#action', via: [:get]
match 'path', to: lambda { |env| [200, {}, ["Success!"]] }, via: [:get]
match 'path', to: RackApp, via: [:get]

:on

Shorthand for wrapping routes in a specific RESTful context. Valid values are :member, :collection, and :new. Only use within resource(s) block. For example:

resource :bar do
  match 'foo', to: 'c#a', on: :member, via: [:get, :post]
end

Is equivalent to:

resource :bar do
  member do
    match 'foo', to: 'c#a', via: [:get, :post]
  end
end

:constraints

Constrains parameters with a hash of regular expressions or an object that responds to matches?. In addition, constraints other than path can also be specified with any object that responds to === (eg. String, Array, Range, etc.).

match 'path/:id', constraints: { id: /[A-Z]\d{5}/ }, via: [:get]

match 'json_only', constraints: { format: 'json' }, via: [:get]

class Whitelist
  def matches?(request) request.remote_ip == '1.2.3.4' end
end
match 'path', to: 'c#a', constraints: Whitelist.new, via: [:get]

See Scoping#constraints for more examples with its scope equivalent.

:defaults

Sets defaults for parameters

# Sets params[:format] to 'jpg' by default
match 'path', to: 'c#a', defaults: { format: 'jpg' }, via: [:get]

See Scoping#defaults for its scope equivalent.

:anchor

Boolean to anchor a match pattern. Default is true. When set to false, the pattern matches any request prefixed with the given path.

# Matches any request starting with 'path'
match 'path', to: 'c#a', anchor: false, via: [:get]

:format

Allows you to specify the default value for optional format segment or disable it by supplying false.