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This is still unreleased, but i am toying with controller macros as a rapid prototyping tool for resources. Just add models, .rhtml, .rjs and .rxml templates.

ActionController::Base#define_actions accepts a parameter which specifies the set of actions to be included. The protected methods resource_name, collection_name, resource, find_collection and find_member provide an api which the actions build upon and may be overridden as needed. Actions may also be overridden piecemeal.

Routes

ActionController::Routing::Routes.draw do |map|
  map.resources :entries do |entries|
    entries.resources :comments
  end

  # Install the default route as the lowest priority.
  map.connect ':controller/:action/:id'
end

Controllers:

class EntriesController < ApplicationController
  define_actions :crud
end

class CommentsController < ApplicationController
  define_actions :crud

  protected
    def find_collection
      Comment.find :all,
          :conditions => ['entry_id = ?', params[:entry_id],
          :order => 'created_at'
    end

    def find_member
      entry = Entry.find params[:entry_id]
      entry.comments.find params[:id]
    end
end