jhjguxin jhjguxin

nested resources 一般用来搭配关联的 resources， cancan 可以根据父类实例来生成，或者过滤子类从而达到权限控制。如果在model 没有直接的 belongs_to or has_many 关联cancan 是不会正常工作的除非，提供了 parent.children parent.children.built 这样的方法给 cancan 调用, 一个解决方案是，在父类中创建一个 children 方法返回一个 nest 的 resources 的 list。但是在 bbtangcms 中我使用的是单表继承因此会有一些问题。

如果使用不到对父类的认证那么完全可以不去使用 through 选项，

class Tag::TimelinesController < Tag::TagBaseController
  load_and_authorize_resource
end

A Capistrano Rails Guide

by Jonathan Rochkind, http://bibwild.wordpress.com

why cap?

Capistrano automates pushing out a new version of your application to a deployment location.

I've been writing and deploying Rails apps for a while, but I avoided using Capistrano until recently. I've got a pretty simple one-host deployment, and even though everyone said Capistrano was great, every time I tried to get started I just got snowed under not being able to figure out exactly what I wanted to do, and figured I wasn't having that much trouble doing it "manually".

	# To use debugger
	group :development do
	gem 'linecache19', '0.5.13'
	gem 'ruby-debug-base19', '0.11.26'
	gem 'ruby-debug19', :require => 'ruby-debug'

	#curl -OL http://rubyforge.org/frs/download.php/75414/linecache19-0.5.13.gem
	#curl -OL http://rubyforge.org/frs/download.php/75415/ruby-debug-base19-0.11.26.gem
	#gem install linecache19-0.5.13.gem -- --with-ruby-include="${MY_RUBY_HOME/rubies/src}"
	#gem install ruby-debug-base19-0.11.26 -- --with-ruby-include="${MY_RUBY_HOME/rubies/src}"

	class Ability
	include CanCan::Ability

	def initialize(user, controller_namespace)
	alias_action :index, :show, :to => :read
	alias_action :new, :to => :create
	alias_action :edit, :to => :update

	#destroy, update ,create
	@user = user \|\| User.new # for guest

	#depend same pagination libraries, eg 'will_paginate'
	class ApplicationController < ActionController::Base
	protect_from_forgery
	#before_filter :authenticate_user!
	#before_filter :add_initial_breadcrumbs
	#before_filter :create_profile
	before_filter :set_page_number

	#rewrite default_url_options to add 'page' to every url link
	def default_url_options(options = {})

	<ul>
	<% item.children.each do \|child\| %>
	<li id='category_<%=child.id %>'>
	<!--%- item_list = @model_class.tagged_with([child.name]).paginate(:page => params[:page], :per_page => 10).order('id DESC')%-->
	<%- item_list = @model_class.tagged_with([child.name]).order('id DESC')%>
	<span><%= child.name %>(<%= item_list.count%>)</span>
	<% if item_list.present? %>
	<!--%= link_to "More info",archive_item_list_path(:model => @model_class, :item_id => child.id), :remote => true, :class => "btn btn-mini", "data-toggle" => "modal", :id => ("archive_item_list_"+child.id.to_s)%-->
	<!--%= link_to "More info", archive_item_list_path(:model => @model_class, :item_id => child.id), :remote => true, :class => "btn btn-mini", "data-target" => "##{child.id}", "data-toggle" => "modal", :id => ("archive_item_list_"+child.id.to_s)%-->
	<%= link_to "More info", archive_item_list_path(:model => @model_class, :item_id => child.id), :remote => true, :class => "btn btn-mini", "data-tog

	echo "Updates packages. Asks for your password."
	sudo apt-get update -y

	echo "Installs packages. Give your password when asked."
	sudo apt-get install build-essential bison openssl libreadline6 libreadline6-dev curl git-core zlib1g zlib1g-dev libssl-dev libyaml-dev libsqlite3-0 libsqlite3-dev sqlite3 libxml2-dev libxslt-dev autoconf libc6-dev -y

	echo "Installs ImageMagick for image processing"
	sudo apt-get install imagemagick --fix-missing -y

	echo "Installs RVM (Ruby Version Manager) for handling Ruby installation"

	<%= collection_select('question', "category_list", categories, :id, :name,
	{:prompt => "Select a category", :selected => (@question_categories.map(&:id) if @question_categories.present?)}) %>

	<script src="http://lesscss.googlecode.com/files/less-1.0.18.min.js"></script>
	<%= javascript_include_tag "application" %>
	<%= stylesheet_link_tag "application", :media => "all", :id => "application_css"%>