406 lines
16 KiB
Ruby
406 lines
16 KiB
Ruby
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module ActionController
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module Resources
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class Resource #:nodoc:
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attr_reader :collection_methods, :member_methods, :new_methods
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attr_reader :path_prefix, :name_prefix
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attr_reader :plural, :singular
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attr_reader :options
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def initialize(entities, options)
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@plural = entities
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@singular = options[:singular] || plural.to_s.singularize
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@options = options
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arrange_actions
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add_default_actions
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set_prefixes
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end
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def controller
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@controller ||= (options[:controller] || plural).to_s
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end
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def path
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@path ||= "#{path_prefix}/#{plural}"
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end
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def new_path
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@new_path ||= "#{path}/new"
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end
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def member_path
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@member_path ||= "#{path}/:id"
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end
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def nesting_path_prefix
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@nesting_path_prefix ||= "#{path}/:#{singular}_id"
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end
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protected
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def arrange_actions
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@collection_methods = arrange_actions_by_methods(options.delete(:collection))
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@member_methods = arrange_actions_by_methods(options.delete(:member))
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@new_methods = arrange_actions_by_methods(options.delete(:new))
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end
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def add_default_actions
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add_default_action(member_methods, :get, :edit)
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add_default_action(new_methods, :get, :new)
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end
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def set_prefixes
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@path_prefix = options.delete(:path_prefix)
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@name_prefix = options.delete(:name_prefix)
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end
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def arrange_actions_by_methods(actions)
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(actions || {}).inject({}) do |flipped_hash, (key, value)|
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(flipped_hash[value] ||= []) << key
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flipped_hash
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end
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end
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def add_default_action(collection, method, action)
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(collection[method] ||= []).unshift(action)
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end
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end
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class SingletonResource < Resource #:nodoc:
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def initialize(entity, options)
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@plural = @singular = entity
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@options = options
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arrange_actions
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add_default_actions
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set_prefixes
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end
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alias_method :member_path, :path
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alias_method :nesting_path_prefix, :path
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end
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# Creates named routes for implementing verb-oriented controllers. This is
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# useful for implementing REST API's, where a single resource has different
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# behavior based on the HTTP verb (method) used to access it.
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#
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# Example:
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#
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# map.resources :messages
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#
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# class MessagesController < ActionController::Base
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# # GET messages_url
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# def index
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# # return all messages
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# end
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#
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# # GET new_message_url
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# def new
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# # return an HTML form for describing a new message
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# end
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#
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# # POST messages_url
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# def create
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# # create a new message
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# end
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#
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# # GET message_url(:id => 1)
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# def show
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# # find and return a specific message
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# end
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#
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# # GET edit_message_url(:id => 1)
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# def edit
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# # return an HTML form for editing a specific message
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# end
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#
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# # PUT message_url(:id => 1)
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# def update
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# # find and update a specific message
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# end
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#
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# # DELETE message_url(:id => 1)
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# def destroy
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# # delete a specific message
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# end
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# end
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#
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# The #resources method sets HTTP method restrictions on the routes it generates. For example, making an
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# HTTP POST on <tt>new_message_url</tt> will raise a RoutingError exception. The default route in
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# <tt>config/routes.rb</tt> overrides this and allows invalid HTTP methods for resource routes.
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#
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# Along with the routes themselves, #resources generates named routes for use in
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# controllers and views. <tt>map.resources :messages</tt> produces the following named routes and helpers:
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#
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# Named Route Helpers
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# messages messages_url, hash_for_messages_url,
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# messages_path, hash_for_messages_path
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# message message_url(id), hash_for_message_url(id),
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# message_path(id), hash_for_message_path(id)
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# new_message new_message_url, hash_for_new_message_url,
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# new_message_path, hash_for_new_message_path
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# edit_message edit_message_url(id), hash_for_edit_message_url(id),
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# edit_message_path(id), hash_for_edit_message_path(id)
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#
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# You can use these helpers instead of #url_for or methods that take #url_for parameters:
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#
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# redirect_to :controller => 'messages', :action => 'index'
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# # becomes
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# redirect_to messages_url
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#
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# <%= link_to "edit this message", :controller => 'messages', :action => 'edit', :id => @message.id %>
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# # becomes
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# <%= link_to "edit this message", edit_message_url(@message) # calls @message.id automatically
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#
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# Since web browsers don't support the PUT and DELETE verbs, you will need to add a parameter '_method' to your
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# form tags. The form helpers make this a little easier. For an update form with a <tt>@message</tt> object:
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#
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# <%= form_tag message_path(@message), :method => :put %>
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#
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# or
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#
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# <% form_for :message, @message, :url => message_path(@message), :html => {:method => :put} do |f| %>
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#
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# The #resources method accepts various options, too, to customize the resulting
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# routes:
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# * <tt>:controller</tt> -- specify the controller name for the routes.
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# * <tt>:singular</tt> -- specify the singular name used in the member routes.
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# * <tt>:path_prefix</tt> -- set a prefix to the routes with required route variables.
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# Weblog comments usually belong to a post, so you might use resources like:
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#
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# map.resources :articles
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# map.resources :comments, :path_prefix => '/articles/:article_id'
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#
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# You can nest resources calls to set this automatically:
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#
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# map.resources :articles do |article|
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# article.resources :comments
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# end
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#
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# The comment resources work the same, but must now include a value for :article_id.
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#
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# comments_url(@article)
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# comment_url(@article, @comment)
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#
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# comments_url(:article_id => @article)
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# comment_url(:article_id => @article, :id => @comment)
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#
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# * <tt>:name_prefix</tt> -- define a prefix for all generated routes, usually ending in an underscore.
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# Use this if you have named routes that may clash.
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#
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# map.resources :tags, :path_prefix => '/books/:book_id', :name_prefix => 'book_'
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# map.resources :tags, :path_prefix => '/toys/:toy_id', :name_prefix => 'toy_'
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#
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# * <tt>:collection</tt> -- add named routes for other actions that operate on the collection.
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# Takes a hash of <tt>#{action} => #{method}</tt>, where method is <tt>:get</tt>/<tt>:post</tt>/<tt>:put</tt>/<tt>:delete</tt>
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# or <tt>:any</tt> if the method does not matter. These routes map to a URL like /messages;rss, with a route of rss_messages_url.
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# * <tt>:member</tt> -- same as :collection, but for actions that operate on a specific member.
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# * <tt>:new</tt> -- same as :collection, but for actions that operate on the new resource action.
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#
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# If <tt>map.resources</tt> is called with multiple resources, they all get the same options applied.
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#
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# Examples:
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#
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# map.resources :messages, :path_prefix => "/thread/:thread_id"
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# # --> GET /thread/7/messages/1
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#
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# map.resources :messages, :collection => { :rss => :get }
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# # --> GET /messages;rss (maps to the #rss action)
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# # also adds a named route called "rss_messages"
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#
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# map.resources :messages, :member => { :mark => :post }
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# # --> POST /messages/1;mark (maps to the #mark action)
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# # also adds a named route called "mark_message"
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#
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# map.resources :messages, :new => { :preview => :post }
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# # --> POST /messages/new;preview (maps to the #preview action)
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# # also adds a named route called "preview_new_message"
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#
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# map.resources :messages, :new => { :new => :any, :preview => :post }
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# # --> POST /messages/new;preview (maps to the #preview action)
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# # also adds a named route called "preview_new_message"
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# # --> /messages/new can be invoked via any request method
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#
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# map.resources :messages, :controller => "categories",
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# :path_prefix => "/category/:category_id",
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# :name_prefix => "category_"
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# # --> GET /categories/7/messages/1
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# # has named route "category_message"
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def resources(*entities, &block)
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options = entities.last.is_a?(Hash) ? entities.pop : { }
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entities.each { |entity| map_resource entity, options.dup, &block }
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end
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# Creates named routes for implementing verb-oriented controllers for a singleton resource.
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# A singleton resource is global to the current user visiting the application, such as a user's
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# /account profile.
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#
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# See map.resources for general conventions. These are the main differences:
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# - a singular name is given to map.resource. The default controller name is taken from the singular name.
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# - To specify a custom plural name, use the :plural option. There is no :singular option
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# - No default index, new, or create routes are created for the singleton resource controller.
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# - When nesting singleton resources, only the singular name is used as the path prefix (example: 'account/messages/1')
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#
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# Example:
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#
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# map.resource :account
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#
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# class AccountController < ActionController::Base
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# # POST account_url
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# def create
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# # create an account
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# end
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#
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# # GET new_account_url
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# def new
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# # return an HTML form for describing the new account
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# end
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#
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# # GET account_url
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# def show
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# # find and return the account
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# end
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#
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# # GET edit_account_url
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# def edit
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# # return an HTML form for editing the account
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# end
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#
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# # PUT account_url
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# def update
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# # find and update the account
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# end
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#
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# # DELETE account_url
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# def destroy
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# # delete the account
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# end
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# end
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#
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# Along with the routes themselves, #resource generates named routes for use in
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# controllers and views. <tt>map.resource :account</tt> produces the following named routes and helpers:
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#
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# Named Route Helpers
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# account account_url, hash_for_account_url,
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# account_path, hash_for_account_path
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# edit_account edit_account_url, hash_for_edit_account_url,
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# edit_account_path, hash_for_edit_account_path
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def resource(*entities, &block)
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options = entities.last.is_a?(Hash) ? entities.pop : { }
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entities.each { |entity| map_singleton_resource entity, options.dup, &block }
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end
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private
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def map_resource(entities, options = {}, &block)
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resource = Resource.new(entities, options)
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with_options :controller => resource.controller do |map|
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map_collection_actions(map, resource)
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map_default_collection_actions(map, resource)
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map_new_actions(map, resource)
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map_member_actions(map, resource)
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if block_given?
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with_options(:path_prefix => resource.nesting_path_prefix, &block)
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end
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end
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end
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def map_singleton_resource(entities, options = {}, &block)
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resource = SingletonResource.new(entities, options)
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with_options :controller => resource.controller do |map|
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map_collection_actions(map, resource)
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map_default_singleton_actions(map, resource)
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map_new_actions(map, resource)
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map_member_actions(map, resource)
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if block_given?
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with_options(:path_prefix => resource.nesting_path_prefix, &block)
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end
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end
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end
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def map_collection_actions(map, resource)
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resource.collection_methods.each do |method, actions|
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actions.each do |action|
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action_options = action_options_for(action, resource, method)
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map.named_route("#{resource.name_prefix}#{action}_#{resource.plural}", "#{resource.path};#{action}", action_options)
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map.named_route("formatted_#{resource.name_prefix}#{action}_#{resource.plural}", "#{resource.path}.:format;#{action}", action_options)
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end
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end
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end
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def map_default_collection_actions(map, resource)
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index_action_options = action_options_for("index", resource)
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map.named_route("#{resource.name_prefix}#{resource.plural}", resource.path, index_action_options)
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map.named_route("formatted_#{resource.name_prefix}#{resource.plural}", "#{resource.path}.:format", index_action_options)
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create_action_options = action_options_for("create", resource)
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map.connect(resource.path, create_action_options)
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map.connect("#{resource.path}.:format", create_action_options)
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end
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def map_default_singleton_actions(map, resource)
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create_action_options = action_options_for("create", resource)
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map.connect(resource.path, create_action_options)
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map.connect("#{resource.path}.:format", create_action_options)
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end
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def map_new_actions(map, resource)
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resource.new_methods.each do |method, actions|
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actions.each do |action|
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action_options = action_options_for(action, resource, method)
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if action == :new
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map.named_route("#{resource.name_prefix}new_#{resource.singular}", resource.new_path, action_options)
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map.named_route("formatted_#{resource.name_prefix}new_#{resource.singular}", "#{resource.new_path}.:format", action_options)
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else
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map.named_route("#{resource.name_prefix}#{action}_new_#{resource.singular}", "#{resource.new_path};#{action}", action_options)
|
||
|
|
map.named_route("formatted_#{resource.name_prefix}#{action}_new_#{resource.singular}", "#{resource.new_path}.:format;#{action}", action_options)
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
def map_member_actions(map, resource)
|
||
|
|
resource.member_methods.each do |method, actions|
|
||
|
|
actions.each do |action|
|
||
|
|
action_options = action_options_for(action, resource, method)
|
||
|
|
map.named_route("#{resource.name_prefix}#{action}_#{resource.singular}", "#{resource.member_path};#{action}", action_options)
|
||
|
|
map.named_route("formatted_#{resource.name_prefix}#{action}_#{resource.singular}", "#{resource.member_path}.:format;#{action}",action_options)
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
show_action_options = action_options_for("show", resource)
|
||
|
|
map.named_route("#{resource.name_prefix}#{resource.singular}", resource.member_path, show_action_options)
|
||
|
|
map.named_route("formatted_#{resource.name_prefix}#{resource.singular}", "#{resource.member_path}.:format", show_action_options)
|
||
|
|
|
||
|
|
update_action_options = action_options_for("update", resource)
|
||
|
|
map.connect(resource.member_path, update_action_options)
|
||
|
|
map.connect("#{resource.member_path}.:format", update_action_options)
|
||
|
|
|
||
|
|
destroy_action_options = action_options_for("destroy", resource)
|
||
|
|
map.connect(resource.member_path, destroy_action_options)
|
||
|
|
map.connect("#{resource.member_path}.:format", destroy_action_options)
|
||
|
|
end
|
||
|
|
|
||
|
|
def conditions_for(method)
|
||
|
|
{ :conditions => method == :any ? {} : { :method => method } }
|
||
|
|
end
|
||
|
|
|
||
|
|
def action_options_for(action, resource, method = nil)
|
||
|
|
default_options = { :action => action.to_s }
|
||
|
|
require_id = resource.kind_of?(SingletonResource) ? {} : { :requirements => { :id => Regexp.new("[^#{Routing::SEPARATORS.join}]+") } }
|
||
|
|
case default_options[:action]
|
||
|
|
when "index", "new" : default_options.merge(conditions_for(method || :get))
|
||
|
|
when "create" : default_options.merge(conditions_for(method || :post))
|
||
|
|
when "show", "edit" : default_options.merge(conditions_for(method || :get)).merge(require_id)
|
||
|
|
when "update" : default_options.merge(conditions_for(method || :put)).merge(require_id)
|
||
|
|
when "destroy" : default_options.merge(conditions_for(method || :delete)).merge(require_id)
|
||
|
|
else default_options.merge(conditions_for(method))
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
ActionController::Routing::RouteSet::Mapper.send :include, ActionController::Resources
|