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mapper.rb
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mapper.rb
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# frozen_string_literal: true
require "active_support/core_ext/hash/slice"
require "active_support/core_ext/enumerable"
require "active_support/core_ext/array/extract_options"
require "active_support/core_ext/regexp"
require "action_dispatch/routing/redirection"
require "action_dispatch/routing/endpoint"
module ActionDispatch
module Routing
class Mapper
URL_OPTIONS = [:protocol, :subdomain, :domain, :host, :port]
class Constraints < Routing::Endpoint #:nodoc:
attr_reader :app, :constraints
SERVE = ->(app, req) { app.serve req }
CALL = ->(app, req) { app.call req.env }
def initialize(app, constraints, strategy)
# Unwrap Constraints objects. I don't actually think it's possible
# to pass a Constraints object to this constructor, but there were
# multiple places that kept testing children of this object. I
# *think* they were just being defensive, but I have no idea.
if app.is_a?(self.class)
constraints += app.constraints
app = app.app
end
@strategy = strategy
@app, @constraints, = app, constraints
end
def dispatcher?; @strategy == SERVE; end
def matches?(req)
@constraints.all? do |constraint|
(constraint.respond_to?(:matches?) && constraint.matches?(req)) ||
(constraint.respond_to?(:call) && constraint.call(*constraint_args(constraint, req)))
end
end
def serve(req)
return [ 404, { "X-Cascade" => "pass" }, [] ] unless matches?(req)
@strategy.call @app, req
end
private
def constraint_args(constraint, request)
constraint.arity == 1 ? [request] : [request.path_parameters, request]
end
end
class Mapping #:nodoc:
ANCHOR_CHARACTERS_REGEX = %r{\A(\\A|\^)|(\\Z|\\z|\$)\Z}
OPTIONAL_FORMAT_REGEX = %r{(?:\(\.:format\)+|\.:format|/)\Z}
attr_reader :requirements, :defaults
attr_reader :to, :default_controller, :default_action
attr_reader :required_defaults, :ast
def self.build(scope, set, ast, controller, default_action, to, via, formatted, options_constraints, anchor, options)
options = scope[:options].merge(options) if scope[:options]
defaults = (scope[:defaults] || {}).dup
scope_constraints = scope[:constraints] || {}
new set, ast, defaults, controller, default_action, scope[:module], to, formatted, scope_constraints, scope[:blocks] || [], via, options_constraints, anchor, options
end
def self.check_via(via)
if via.empty?
msg = "You should not use the `match` method in your router without specifying an HTTP method.\n" \
"If you want to expose your action to both GET and POST, add `via: [:get, :post]` option.\n" \
"If you want to expose your action to GET, use `get` in the router:\n" \
" Instead of: match \"controller#action\"\n" \
" Do: get \"controller#action\""
raise ArgumentError, msg
end
via
end
def self.normalize_path(path, format)
path = Mapper.normalize_path(path)
if format == true
"#{path}.:format"
elsif optional_format?(path, format)
"#{path}(.:format)"
else
path
end
end
def self.optional_format?(path, format)
format != false && path !~ OPTIONAL_FORMAT_REGEX
end
def initialize(set, ast, defaults, controller, default_action, modyoule, to, formatted, scope_constraints, blocks, via, options_constraints, anchor, options)
@defaults = defaults
@set = set
@to = to
@default_controller = controller
@default_action = default_action
@ast = ast
@anchor = anchor
@via = via
@internal = options.delete(:internal)
path_params = ast.find_all(&:symbol?).map(&:to_sym)
options = add_wildcard_options(options, formatted, ast)
options = normalize_options!(options, path_params, modyoule)
split_options = constraints(options, path_params)
constraints = scope_constraints.merge Hash[split_options[:constraints] || []]
if options_constraints.is_a?(Hash)
@defaults = Hash[options_constraints.find_all { |key, default|
URL_OPTIONS.include?(key) && (String === default || Integer === default)
}].merge @defaults
@blocks = blocks
constraints.merge! options_constraints
else
@blocks = blocks(options_constraints)
end
requirements, conditions = split_constraints path_params, constraints
verify_regexp_requirements requirements.map(&:last).grep(Regexp)
formats = normalize_format(formatted)
@requirements = formats[:requirements].merge Hash[requirements]
@conditions = Hash[conditions]
@defaults = formats[:defaults].merge(@defaults).merge(normalize_defaults(options))
if path_params.include?(:action) && !@requirements.key?(:action)
@defaults[:action] ||= "index"
end
@required_defaults = (split_options[:required_defaults] || []).map(&:first)
end
def make_route(name, precedence)
route = Journey::Route.new(name,
application,
path,
conditions,
required_defaults,
defaults,
request_method,
precedence,
@internal)
route
end
def application
app(@blocks)
end
def path
build_path @ast, requirements, @anchor
end
def conditions
build_conditions @conditions, @set.request_class
end
def build_conditions(current_conditions, request_class)
conditions = current_conditions.dup
conditions.keep_if do |k, _|
request_class.public_method_defined?(k)
end
end
private :build_conditions
def request_method
@via.map { |x| Journey::Route.verb_matcher(x) }
end
private :request_method
JOINED_SEPARATORS = SEPARATORS.join # :nodoc:
def build_path(ast, requirements, anchor)
pattern = Journey::Path::Pattern.new(ast, requirements, JOINED_SEPARATORS, anchor)
# Find all the symbol nodes that are adjacent to literal nodes and alter
# the regexp so that Journey will partition them into custom routes.
ast.find_all { |node|
next unless node.cat?
if node.left.literal? && node.right.symbol?
symbol = node.right
elsif node.left.literal? && node.right.cat? && node.right.left.symbol?
symbol = node.right.left
elsif node.left.symbol? && node.right.literal?
symbol = node.left
elsif node.left.symbol? && node.right.cat? && node.right.left.literal?
symbol = node.left
else
next
end
if symbol
symbol.regexp = /(?:#{Regexp.union(symbol.regexp, '-')})+/
end
}
pattern
end
private :build_path
private
def add_wildcard_options(options, formatted, path_ast)
# Add a constraint for wildcard route to make it non-greedy and match the
# optional format part of the route by default.
if formatted != false
path_ast.grep(Journey::Nodes::Star).each_with_object({}) { |node, hash|
hash[node.name.to_sym] ||= /.+?/
}.merge options
else
options
end
end
def normalize_options!(options, path_params, modyoule)
if path_params.include?(:controller)
raise ArgumentError, ":controller segment is not allowed within a namespace block" if modyoule
# Add a default constraint for :controller path segments that matches namespaced
# controllers with default routes like :controller/:action/:id(.:format), e.g:
# GET /admin/products/show/1
# => { controller: 'admin/products', action: 'show', id: '1' }
options[:controller] ||= /.+?/
end
if to.respond_to?(:action) || to.respond_to?(:call)
options
else
to_endpoint = split_to to
controller = to_endpoint[0] || default_controller
action = to_endpoint[1] || default_action
controller = add_controller_module(controller, modyoule)
options.merge! check_controller_and_action(path_params, controller, action)
end
end
def split_constraints(path_params, constraints)
constraints.partition do |key, requirement|
path_params.include?(key) || key == :controller
end
end
def normalize_format(formatted)
case formatted
when true
{ requirements: { format: /.+/ },
defaults: {} }
when Regexp
{ requirements: { format: formatted },
defaults: { format: nil } }
when String
{ requirements: { format: Regexp.compile(formatted) },
defaults: { format: formatted } }
else
{ requirements: {}, defaults: {} }
end
end
def verify_regexp_requirements(requirements)
requirements.each do |requirement|
if requirement.source =~ ANCHOR_CHARACTERS_REGEX
raise ArgumentError, "Regexp anchor characters are not allowed in routing requirements: #{requirement.inspect}"
end
if requirement.multiline?
raise ArgumentError, "Regexp multiline option is not allowed in routing requirements: #{requirement.inspect}"
end
end
end
def normalize_defaults(options)
Hash[options.reject { |_, default| Regexp === default }]
end
def app(blocks)
if to.respond_to?(:action)
Routing::RouteSet::StaticDispatcher.new to
elsif to.respond_to?(:call)
Constraints.new(to, blocks, Constraints::CALL)
elsif blocks.any?
Constraints.new(dispatcher(defaults.key?(:controller)), blocks, Constraints::SERVE)
else
dispatcher(defaults.key?(:controller))
end
end
def check_controller_and_action(path_params, controller, action)
hash = check_part(:controller, controller, path_params, {}) do |part|
translate_controller(part) {
message = "'#{part}' is not a supported controller name. This can lead to potential routing problems.".dup
message << " See http://guides.rubyonrails.org/routing.html#specifying-a-controller-to-use"
raise ArgumentError, message
}
end
check_part(:action, action, path_params, hash) { |part|
part.is_a?(Regexp) ? part : part.to_s
}
end
def check_part(name, part, path_params, hash)
if part
hash[name] = yield(part)
else
unless path_params.include?(name)
message = "Missing :#{name} key on routes definition, please check your routes."
raise ArgumentError, message
end
end
hash
end
def split_to(to)
if to =~ /#/
to.split("#")
else
[]
end
end
def add_controller_module(controller, modyoule)
if modyoule && !controller.is_a?(Regexp)
if controller =~ %r{\A/}
controller[1..-1]
else
[modyoule, controller].compact.join("/")
end
else
controller
end
end
def translate_controller(controller)
return controller if Regexp === controller
return controller.to_s if controller =~ /\A[a-z_0-9][a-z_0-9\/]*\z/
yield
end
def blocks(callable_constraint)
unless callable_constraint.respond_to?(:call) || callable_constraint.respond_to?(:matches?)
raise ArgumentError, "Invalid constraint: #{callable_constraint.inspect} must respond to :call or :matches?"
end
[callable_constraint]
end
def constraints(options, path_params)
options.group_by do |key, option|
if Regexp === option
:constraints
else
if path_params.include?(key)
:path_params
else
:required_defaults
end
end
end
end
def dispatcher(raise_on_name_error)
Routing::RouteSet::Dispatcher.new raise_on_name_error
end
end
# Invokes Journey::Router::Utils.normalize_path and ensure that
# (:locale) becomes (/:locale) instead of /(:locale). Except
# for root cases, where the latter is the correct one.
def self.normalize_path(path)
path = Journey::Router::Utils.normalize_path(path)
path.gsub!(%r{/(\(+)/?}, '\1/') unless path =~ %r{^/\(+[^)]+\)$}
path
end
def self.normalize_name(name)
normalize_path(name)[1..-1].tr("/", "_")
end
module Base
# 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+ and +:id+ are interpreted as URL
# query parameters and thus available through +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'
#
# To match a wildcard parameter, it must have a name assigned to it.
# Without a variable name to attach the glob parameter to, the route
# can't be parsed.
#
# 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: -> (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 HttpHelpers[rdoc-ref:HttpHelpers]
# 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
# <tt>params[<:param>]</tt>.
# In your router:
#
# resources :users, param: :name
#
# The +users+ resource here will have the following routes generated for it:
#
# GET /users(.:format)
# POST /users(.:format)
# GET /users/new(.:format)
# GET /users/:name/edit(.:format)
# GET /users/:name(.:format)
# PATCH/PUT /users/:name(.:format)
# DELETE /users/:name(.:format)
#
# You can override <tt>ActiveRecord::Base#to_param</tt> of a related
# model to construct a URL:
#
# class User < ActiveRecord::Base
# def to_param
# name
# end
# end
#
# user = User.find_by(name: 'Phusion')
# user_path(user) # => "/users/Phusion"
#
# [: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 <tt>Scoping#namespace</tt> 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: -> (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
# <tt>resource(s)</tt> 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 <tt>matches?</tt>. In addition, constraints
# other than path can also be specified with any object
# that responds to <tt>===</tt> (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 <tt>Scoping#constraints</tt> 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 <tt>Scoping#defaults</tt> for its scope equivalent.
#
# [:anchor]
# Boolean to anchor a <tt>match</tt> 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+.
def match(path, options = nil)
end
# Mount a Rack-based application to be used within the application.
#
# mount SomeRackApp, at: "some_route"
#
# Alternatively:
#
# mount(SomeRackApp => "some_route")
#
# For options, see +match+, as +mount+ uses it internally.
#
# All mounted applications come with routing helpers to access them.
# These are named after the class specified, so for the above example
# the helper is either +some_rack_app_path+ or +some_rack_app_url+.
# To customize this helper's name, use the +:as+ option:
#
# mount(SomeRackApp => "some_route", as: "exciting")
#
# This will generate the +exciting_path+ and +exciting_url+ helpers
# which can be used to navigate to this mounted app.
def mount(app, options = nil)
if options
path = options.delete(:at)
elsif Hash === app
options = app
app, path = options.find { |k, _| k.respond_to?(:call) }
options.delete(app) if app
end
raise ArgumentError, "A rack application must be specified" unless app.respond_to?(:call)
raise ArgumentError, <<~MSG unless path
Must be called with mount point
mount SomeRackApp, at: "some_route"
or
mount(SomeRackApp => "some_route")
MSG
rails_app = rails_app? app
options[:as] ||= app_name(app, rails_app)
target_as = name_for_action(options[:as], path)
options[:via] ||= :all
match(path, options.merge(to: app, anchor: false, format: false))
define_generate_prefix(app, target_as) if rails_app
self
end
def default_url_options=(options)
@set.default_url_options = options
end
alias_method :default_url_options, :default_url_options=
def with_default_scope(scope, &block)
scope(scope) do
instance_exec(&block)
end
end
# Query if the following named route was already defined.
def has_named_route?(name)
@set.named_routes.key? name
end
private
def rails_app?(app)
app.is_a?(Class) && app < Rails::Railtie
end
def app_name(app, rails_app)
if rails_app
app.railtie_name
elsif app.is_a?(Class)
class_name = app.name
ActiveSupport::Inflector.underscore(class_name).tr("/", "_")
end
end
def define_generate_prefix(app, name)
_route = @set.named_routes.get name
_routes = @set
_url_helpers = @set.url_helpers
script_namer = ->(options) do
prefix_options = options.slice(*_route.segment_keys)
prefix_options[:relative_url_root] = "".freeze
if options[:_recall]
prefix_options.reverse_merge!(options[:_recall].slice(*_route.segment_keys))
end
# We must actually delete prefix segment keys to avoid passing them to next url_for.
_route.segment_keys.each { |k| options.delete(k) }
_url_helpers.send("#{name}_path", prefix_options)
end
app.routes.define_mounted_helper(name, script_namer)
app.routes.extend Module.new {
def optimize_routes_generation?; false; end
define_method :find_script_name do |options|
if options.key? :script_name
super(options)
else
script_namer.call(options)
end
end
}
end
end
module HttpHelpers
# Define a route that only recognizes HTTP GET.
# For supported arguments, see match[rdoc-ref:Base#match]
#
# get 'bacon', to: 'food#bacon'
def get(*args, &block)
map_method(:get, args, &block)
end
# Define a route that only recognizes HTTP POST.
# For supported arguments, see match[rdoc-ref:Base#match]
#
# post 'bacon', to: 'food#bacon'
def post(*args, &block)
map_method(:post, args, &block)
end
# Define a route that only recognizes HTTP PATCH.
# For supported arguments, see match[rdoc-ref:Base#match]
#
# patch 'bacon', to: 'food#bacon'
def patch(*args, &block)
map_method(:patch, args, &block)
end
# Define a route that only recognizes HTTP PUT.
# For supported arguments, see match[rdoc-ref:Base#match]
#
# put 'bacon', to: 'food#bacon'
def put(*args, &block)
map_method(:put, args, &block)
end
# Define a route that only recognizes HTTP DELETE.
# For supported arguments, see match[rdoc-ref:Base#match]
#
# delete 'broccoli', to: 'food#broccoli'
def delete(*args, &block)
map_method(:delete, args, &block)
end
private
def map_method(method, args, &block)
options = args.extract_options!
options[:via] = method
match(*args, options, &block)
self
end
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
#
# This will create a number of routes for each of the posts and comments
# controller. For <tt>Admin::PostsController</tt>, Rails will create:
#
# GET /admin/posts
# GET /admin/posts/new
# POST /admin/posts
# GET /admin/posts/1
# GET /admin/posts/1/edit
# PATCH/PUT /admin/posts/1
# DELETE /admin/posts/1
#
# If you want to route /posts (without the prefix /admin) to
# <tt>Admin::PostsController</tt>, you could use
#
# scope module: "admin" do
# resources :posts
# end
#
# or, for a single case
#
# resources :posts, module: "admin"
#
# If you want to route /admin/posts to +PostsController+
# (without the <tt>Admin::</tt> module prefix), you could use
#
# scope "/admin" do
# resources :posts
# end
#
# or, for a single case
#
# resources :posts, path: "/admin/posts"
#
# In each of these cases, the named routes remain the same as if you did
# not use scope. In the last case, the following paths map to
# +PostsController+:
#
# GET /admin/posts
# GET /admin/posts/new
# POST /admin/posts
# GET /admin/posts/1
# GET /admin/posts/1/edit
# PATCH/PUT /admin/posts/1
# DELETE /admin/posts/1
module Scoping
# Scopes a set of routes to the given default options.
#
# Take the following route definition as an example:
#
# scope path: ":account_id", as: "account" do
# resources :projects
# end
#
# This generates helpers such as +account_projects_path+, just like +resources+ does.
# The difference here being that the routes generated are like /:account_id/projects,
# rather than /accounts/:account_id/projects.
#
# === Options
#
# Takes same options as <tt>Base#match</tt> and <tt>Resources#resources</tt>.
#
# # route /posts (without the prefix /admin) to <tt>Admin::PostsController</tt>
# scope module: "admin" do
# resources :posts
# end
#
# # prefix the posts resource's requests with '/admin'
# scope path: "/admin" do
# resources :posts
# end
#
# # prefix the routing helper name: +sekret_posts_path+ instead of +posts_path+
# scope as: "sekret" do
# resources :posts
# end
def scope(*args)
options = args.extract_options!.dup
scope = {}
options[:path] = args.flatten.join("/") if args.any?
options[:constraints] ||= {}
unless nested_scope?
options[:shallow_path] ||= options[:path] if options.key?(:path)
options[:shallow_prefix] ||= options[:as] if options.key?(:as)
end
if options[:constraints].is_a?(Hash)
defaults = options[:constraints].select do |k, v|
URL_OPTIONS.include?(k) && (v.is_a?(String) || v.is_a?(Integer))
end
options[:defaults] = defaults.merge(options[:defaults] || {})
else
block, options[:constraints] = options[:constraints], {}
end
if options.key?(:only) || options.key?(:except)
scope[:action_options] = { only: options.delete(:only),
except: options.delete(:except) }
end
if options.key? :anchor
raise ArgumentError, "anchor is ignored unless passed to `match`"
end
@scope.options.each do |option|
if option == :blocks
value = block
elsif option == :options
value = options
else
value = options.delete(option) { POISON }
end
unless POISON == value
scope[option] = send("merge_#{option}_scope", @scope[option], value)
end
end
@scope = @scope.new scope
yield
self
ensure
@scope = @scope.parent
end
POISON = Object.new # :nodoc:
# Scopes routes to a specific controller
#
# controller "food" do
# match "bacon", action: :bacon, via: :get
# end
def controller(controller)
@scope = @scope.new(controller: controller)
yield
ensure
@scope = @scope.parent
end
# Scopes routes to a specific namespace. For example:
#
# namespace :admin do
# resources :posts
# end
#
# This generates the following routes:
#
# admin_posts GET /admin/posts(.:format) admin/posts#index
# admin_posts POST /admin/posts(.:format) admin/posts#create
# new_admin_post GET /admin/posts/new(.:format) admin/posts#new
# edit_admin_post GET /admin/posts/:id/edit(.:format) admin/posts#edit
# admin_post GET /admin/posts/:id(.:format) admin/posts#show
# admin_post PATCH/PUT /admin/posts/:id(.:format) admin/posts#update
# admin_post DELETE /admin/posts/:id(.:format) admin/posts#destroy
#
# === Options
#
# The +:path+, +:as+, +:module+, +:shallow_path+ and +:shallow_prefix+
# options all default to the name of the namespace.
#
# For options, see <tt>Base#match</tt>. For +:shallow_path+ option, see
# <tt>Resources#resources</tt>.
#
# # accessible through /sekret/posts rather than /admin/posts
# namespace :admin, path: "sekret" do
# resources :posts
# end
#
# # maps to <tt>Sekret::PostsController</tt> rather than <tt>Admin::PostsController</tt>
# namespace :admin, module: "sekret" do
# resources :posts
# end
#
# # generates +sekret_posts_path+ rather than +admin_posts_path+
# namespace :admin, as: "sekret" do
# resources :posts
# end
def namespace(path, options = {})
path = path.to_s
defaults = {
module: path,
as: options.fetch(:as, path),
shallow_path: options.fetch(:path, path),
shallow_prefix: options.fetch(:as, path)
}
path_scope(options.delete(:path) { path }) do
scope(defaults.merge!(options)) { yield }
end
end
# === Parameter Restriction
# Allows you to constrain the nested routes based on a set of rules.
# For instance, in order to change the routes to allow for a dot character in the +id+ parameter:
#
# constraints(id: /\d+\.\d+/) do
# resources :posts
# end
#
# Now routes such as +/posts/1+ will no longer be valid, but +/posts/1.1+ will be.
# The +id+ parameter must match the constraint passed in for this example.
#
# You may use this to also restrict other parameters:
#
# resources :posts do
# constraints(post_id: /\d+\.\d+/) do
# resources :comments
# end
# end
#
# === Restricting based on IP
#
# Routes can also be constrained to an IP or a certain range of IP addresses:
#
# constraints(ip: /192\.168\.\d+\.\d+/) do
# resources :posts
# end
#
# Any user connecting from the 192.168.* range will be able to see this resource,
# where as any user connecting outside of this range will be told there is no such route.
#
# === Dynamic request matching
#
# Requests to routes can be constrained based on specific criteria:
#
# constraints(-> (req) { req.env["HTTP_USER_AGENT"] =~ /iPhone/ }) do
# resources :iphones
# end
#
# You are able to move this logic out into a class if it is too complex for routes.
# This class must have a +matches?+ method defined on it which either returns +true+
# if the user should be given access to that route, or +false+ if the user should not.
#
# class Iphone
# def self.matches?(request)
# request.env["HTTP_USER_AGENT"] =~ /iPhone/
# end
# end
#
# An expected place for this code would be +lib/constraints+.