MySQL for Hosting Providers - how do they manage ?

MySQL for Hosting Providers - how do they manage ?

Computing 95 percentile in MySQL

Computing 95 percentile in MySQL

A quick way to get memcached status

http://www.mysqlperformanceblog.com/2008/11/26/a-quick-way-to-get-memcached-status/

echo stats | nc 127.0.0.1 11211

watch "echo stats | nc 127.0.0.1 11211"

超簡單 very simple merb upload file

http://blog.vixiom.com/2007/06/29/merb-on-air-drag-and-drop-multiple-file-upload/
http://iceskysl.1sters.com/?action=show&id=368&page=1
http://www.mikeperham.com/2007/10/02/file-uploads-in-merb-versus-rails/
<br />class Attachment<br /> include DataMapper::Resource<br /><br /> property :id, Serial<br /> property :filename, String<br />end<br />
<br />class Upload < Application<br /><br /> # ...and remember, everything returned from an action<br /> # goes to the client...<br /> def index <br /> render<br /> end<br /><br /> def upload<br /> puts params.inspect<br /> #new user file object<br /> @upload = Attachment.new<br /> @upload.filename = params[:file][:filename]<br /><br /> # save<br /> if @upload.save<br /> FileUtils.mv params[:file][:tempfile].path, "#{Merb.root}/public/upload/#{params[:file][:filename]}"<br /> else <br /> false<br /> end<br /> end<br />end<br />
<br /><%= form :action => url(:controller => "upload", :action => "upload") do %><br /> <%= file_field :file, :label => "Filename" %><br /> <%= submit "Create" %><br /><% end =%><br />

幹 竟然這樣寫

<br /> if request.xhr?<br /> headers["Content-Type"] = "text/javascript" # render js<br /> js = if uis.auth?<br /> "alert('#{message}'); window.location.reload();"<br /> elsif uis.errors.size > 0<br /> "alert('#{message}'); YouHolder.PartnerUser.set_im('#{uis.account}', '#{uis.im_provider}');"<br /> else<br /> "alert('#{message}'); YouHolder.PartnerUser.confirm_im('#{uis.account}', '#{uis.im_provider}');"<br /> end<br /> render :text => js<br /> else<br /> flash[:notice] = message<br /> redirect_to :action => :authenticate<br /> end<br />

How to reset a lost mysql root password

http://www.simplehelp.net/2008/11/26/how-to-reset-a-lost-mysql-root-password/

upload file in rails

http://www.tutorialspoint.com/ruby-on-rails/rails-file-uploading.htm
http://manuals.rubyonrails.com/read/chapter/79
http://manuals.rubyonrails.com/read/chapter/78
http://manuals.rubyonrails.com/read/chapter/77
http://www.practicalecommerce.com/blogs/post/432-Multiple-Attachments-in-Rails
http://izumi.plan99.net/blog/index.php/2007/04/07/ruby-on-railss-handling-of-uploaded-files/

About the uploaded file object

While the uploaded file is a special beast,it is not difficult to use. The object
rails receives are processed by a CGI object. The object that CGI returns to Rails
isn’t actually a file object, but it’s close enough for our purposes.
Details from the CGI class documentation

... the value is not a string, but an IO object, either an IOString for small files,
or a Tempfile for larger ones.
This object also has the additional singleton methods:
local_path(): the path of the uploaded file on the local filesystem
original_filename(): the name of the file on the client computer 
content_type(): the content type of the file

<br />class UserController < ApplicationController<br /> ...<br /> def save_picture<br /> @user = User.find(@params['user']['id'])<br /> File.open("#{RAILS_ROOT}/public/pictures/#{@user.id}.jpg", "wb") do |f| <br /> f.write(@params['picture_file'].read)<br /> end<br /> redirect_to :action => 'show', :id => @user.id<br /> end<br /> ...<br />end<br />
<br />class Content < ActiveRecord::Base<br /> def file=(incomming_file)<br /> @temp_file = incomming_file<br /> @filename = incomming_file.original_filename<br /> @content_type = incomming_file.content_type<br /> end<br /><br /> def after_save<br /> if @temp_file<br /> logger.debug("saving '#{RAILS_ROOT}/media/#{@filename}'")<br /> File.open("#{RAILS_ROOT}/media/#{@filename}", "wb") do |f| <br /> f.write(@temp_file.read)<br /> end<br /> end<br /> end<br /> end<br />
<br />def sanitize_filename(file_name)<br /> # get only the filename, not the whole path (from IE)<br /> just_filename = File.basename(file_name) <br /> # replace all none alphanumeric, underscore or perioids with underscore<br /> just_filename.sub(/[^\w\.\-]/,'_') <br />end<br />

yaml,load_file

http://ithelp.ithome.com.tw/question/10012281

<br />./script/console<br />Loading development environment (Rails 2.1.1)<br />=>> a=[1,2,3]<br />=> [1, 2, 3]<br />>> a.to_yaml<br />=> "--- \n- 1\n- 2\n- 3\n"<br />>> b=a.to_yaml<br />=> "--- \n- 1\n- 2\n- 3\n"<br />>> YAML::load(b)<br />=> [1, 2, 3]<br />>> c=[2,3,4,5]<br />=> [2, 3, 4, 5]<br />>> c - YAML::load(b)<br />=> [4, 5]<br />

RESTful CSS

http://www.digital-web.com/articles/RESTful_CSS/

<br /><% action_style "index" %><br /><br />def action_style(action = nil)<br /> @action_style = action || @action_style || { "create" => "new", "update" => "new", "edit" => "new" }[controller.action_name] || controller.action_name<br />end<br />
<br /><% action_style "index" %><br /><%= stylesheet_link_tag(action_style, :media => "screen") if stylesheet_exist?(action_style) %><br /><br />def stylesheet_exist?(stylesheet)<br /> File.exist?(RAILS_ROOT + "/public/stylesheets/" + stylesheet + '.css')<br />end<br />

request

http://api.rubyonrails.org/classes/ActionController/AbstractRequest.html#M000461

domain(tld_length = 1)
content_type()
headers()
host()
host_with_port()
path_parameters()
path()
parameters()
port()
post?()
put?()
remote_ip()
request_uri()
subdomains(tld_length = 1)

asset_host

http://chadfowler.com/2007/2/18/edge-rails-goody-distributed-asset-hosts
http://ihower.idv.tw/blog/archives/1707

Rails 還有個功能是可以設定 asset_host，方便你把靜態檔案(即 /public 目錄)用更快速便宜的 web server 提供 (別讓 mongrel 直接提供這些靜態檔案啊)，像 Registrano 就乾脆把所有靜態檔案放在另一台網路稍快的 server 上:

# /config/environments/production.rb
config.action_controller.asset_host = 'http://asset.example.org"

Rails2 更支援可以同時分散到四台 asset0~asset3，只要加%d (當然你的 DNS 也要設好，最簡單的作法可以指到同一台 server)

# /config/environments/production.rb
config.action_controller.asset_host = 'http://asset%d.example.org"

好處是可以讓 browser 同時平行下載 (單一 domain 的下載最多同時兩個 persistent connections, see HTTP連線管理一文)，因此如果你的網站靜態檔案(如圖檔)很多的話，應該會有不錯的效果。不過在 Registrano 實測效果並沒有很好，這是因為 DNS Lookup 也要花時間(即上述第9點)

P.S. 使用 asset host 的一個副作用是 cross domain 問題，因此吃了不少 Javascript library 苦頭。

session,model,railscast

http://railscasts.com/episodes/119-session-based-model

<br /># models/user_session.rb<br />class UserSession<br /> def initialize(session)<br /> @session = session<br /> @session[:comment_ids] ||= []<br /> end<br /> <br /> def add_comment(comment)<br /> @session[:comment_ids] << comment.id<br /> end<br /> <br /> def can_edit_comment?(comment)<br /> @session[:comment_ids].include?(comment.id) && comment.created_at > 15.minutes.ago<br /> end<br />end<br /><br /># controllers/application.rb<br />def user_session<br /> @user_session ||= UserSession.new(session)<br />end<br />helper_method :user_session<br /><br /># comments_controller.rb<br />before_filter :authorize, :only => [:edit, :update]<br /><br />def create<br /> @comment = Comment.new(params[:comment])<br /> if @comment.save<br /> user_session.add_comment(@comment)<br /> flash[:notice] = "Successfully created comment."<br /> redirect_to article_url(@comment.article_id)<br /> else<br /> render :action => 'new'<br /> end<br />end<br /><br />private<br /><br />def authorize<br /> unless user_session.can_edit_comment? Comment.find(params[:id])<br /> flash[:error] = "You are no longer able to edit this comment."<br /> redirect_to root_url<br /> end<br />end<br />
<br /><% if user_session.can_edit_comment? comment %><br /> <p><%= link_to "Edit", edit_comment_path(comment) %></p><br /><% end %><br />

module,class_eval,extend

http://giantrobots.thoughtbot.com/2008/6/2/slides-from-railsconf
http://www.ruby-doc.org/core/classes/Object.html#M000337
<br />class Book < ActiveRecord::Base<br /> include TestModule<br /><br /> want_lala :lake # 為啥要這樣, 用method 去生其他的method<br />end<br />
<br />module TestModule<br /> def self.included(klass)<br /> #===== 1 ===== 三種方法都可以<br /> klass.extend ClassMethods<br /> #===== 1 =====<br /><br /> #==== 2 =====<br /> class << klass<br /> def want_lala(name)<br /> puts "#{name} lalala"<br /> end<br /> end<br /> #===== 2 =====<br /><br /> #===== 3 =====<br /> klass.class_eval do<br /> def klass.want_lala(name)<br /> puts "#{name} lalala"<br /> end<br /> end<br /> #===== 3 =====<br /> end<br /><br /> module ClassMethods<br /> def want_lala(name)<br /> puts "#{name} lalala"<br /> end<br /> end<br />end<br />

module,extend,composed_of,advanced-activerecord

http://giantrobots.thoughtbot.com/2008/6/2/slides-from-railsconf
http://api.rubyonrails.org/classes/ActiveRecord/Aggregations/ClassMethods.html#M001663
http://www.ruby-doc.org/core/classes/Object.html#M000337

有類似的class method, validates, 就把他弄進module 裡

<br />class User < ActiveRecord::Base<br /> has_address :shipping<br /> has_address :billing #傳參數進去 生成其他的method<br /><br /> has_many :orders<br />end<br />
<br />module Addressable<br /> class << self #include 需要是class method<br /> def included(base)<br /> base.extend ClassMethods #extend 進來的method, 是上面User的class methods<br /> end<br /> end<br /> module ClassMethods<br /> def has_address(name)<br /> name << “_” unless name.blank?<br /> validates_presence_of "#{name}address_one", "#{name}city",<br /> "#{name}state_province", "#{name}postal_code", "#{name}country"<br /> validates_format_of "#{name}postal_code", :with => /\d{5}(-\d{4})?/,<br /> :if => Proc.new { |user| user["#{name}country"] == "US" }<br /> validates_format_of "#{name}postal_code", :with => /[a-zA-Z]\d[a-zA-Z] \d[a-zA-Z]\d/,<br /> :if => Proc.new { |user| user["#{name}country"] == "CA" }<br /> composed_of "#{name}address", :class_name => “Address<br /> :mapping => [ ["#{name}address_one", "address_one"],<br /> ["#{name}address_two", "address_two"],<br /> ["#{name}city", "city"],<br /> ["#{name}state_province", "state_province"],<br /> ["#{name}postal_code", "postal_code"]<br /> ["#{name}country", "country"] ]<br /> end<br /> end<br />end<br />
<br /> ActiveRecord::Base.send :include, Addressable<br />

validate,class,define_method,exists?,[],array

http://api.rubyonrails.org/classes/ActiveRecord/Validations/ClassMethods.html#M001640
http://api.rubyonrails.org/classes/ActiveRecord/Base.html#M001701

<br /> class User < ActiveRecord::Base<br /> has_many :roles<br /> end<br /> class Role < ActiveRecord::Base<br /> TYPES = %w(admin editor writer guest)<br /> validates_inclusion_of :name, :in => TYPES<br /> <br /> #class << self 生成class method的scope, 裡面的method, 都會變成self.method_name<br /> class << self<br /> TYPES.each do |role_type|<br /> define_method "#{role_type}?" do<br /> roles.exists?(:name => role_type)<br /> end<br /> end<br /> end<br /> end<br />

Possible gotcha: You can‘t pass in a condition as a string e.g. "name = ‘Jamie’", this would be sanitized and then queried against the primary key column as "id = ‘name = \’Jamie"
<br /> Person.exists?(5)<br /> Person.exists?('5')<br /> Person.exists?(:name => "David")<br /> Person.exists?(['name LIKE ?', "%#{query}%"])<br />

原來這種要這樣設
<br /> # Get a role quickly by using: Role[:admin]<br />def self.[](name)<br /> self.find(:first, :conditions => ["name = ?", name.id2name])<br />end<br />

with_scope and with_options

with_scope 和 with_options的用法
<br /> def self.find_old_books<br /> with_scope :find => {:conditions => "created_at < now()"} do <br /> find(:all)<br /> end<br /> end<br /> #上下的結果是一樣的<br /> def self.find_old_books<br /> with_options :conditions => "created_at < now()" do |old|<br /> old.find(:all)<br /> end<br /> end<br />

session,scope,rjs,option

http://railscasts.com/episodes/103-site-wide-announcements

<br /><!-- layouts/application.html.erb --><br /><% unless current_announcements.empty? %><br /><div id="announcement"><br /> <% for announcement in current_announcements %><br /> <p><%=h announcement.message %></p><br /> <% end %><br /> <p><%= link_to_remote "Hide this message", :url => "/javascripts/hide_announcement.js" %></p><br /></div><br /><% end %><br />

<br /># models/announcement.rb<br />def self.current_announcements(hide_time)<br /> with_scope :find => { :conditions => "starts_at <= now() AND ends_at >= now()" } do<br /> if hide_time.nil?<br /> find(:all)<br /> else<br /> find(:all, :conditions => ["updated_at > ? OR starts_at > ?", hide_time, hide_time])<br /> end<br /> end<br />end<br /><br /># application_helper.rb<br />def current_announcements<br /> @current_announcements ||= Announcement.current_announcements(session[:announcement_hide_time])<br />end<br /><br /># javascripts_controller.rb<br />def hide_announcement<br /> session[:announcement_hide_time] = Time.now<br />end<br /><br /># hide_announcement.js.rjs<br />page[:announcement].hide<br />

validate,before,create,define_method,callback

http://api.rubyonrails.org/classes/ActiveRecord/Callbacks.html#M001618
http://www.ruby-doc.org/core/classes/Module.html#M001682

* (-) save
* (-) valid
* (1) before_validation
* (2) before_validation_on_create
* (-) validate
* (-) validate_on_create
* (3) after_validation
* (4) after_validation_on_create
* (5) before_save
* (6) before_create
* (-) create
* (7) after_create
* (8) after_save

<br /> class CreditCard < ActiveRecord::Base<br /> # Strip everything but digits, so the user can specify "555 234 34" or<br /> # "5552-3434" or both will mean "55523434"<br /> def before_validation_on_create<br /> self.number = number.gsub(/[^0-9]/, "") if attribute_present?("number")<br /> end<br /> end<br /><br /> class Subscription < ActiveRecord::Base<br /> before_create :record_signup<br /><br /> private<br /> def record_signup<br /> self.signed_up_on = Date.today<br /> end<br /> end<br /><br /> class Firm < ActiveRecord::Base<br /> # Destroys the associated clients and people when the firm is destroyed<br /> before_destroy { |record| Person.destroy_all "firm_id = #{record.id}" }<br /> before_destroy { |record| Client.destroy_all "client_of = #{record.id}" }<br /> end<br />

---

define_method: 動態產生method 的好物
<br /> class ArticleVersion < ActiveRecord::Base<br /> STATES = { :edit => 'Edit',<br /> :edit_check => 'Edit Check',<br /> :sub_edit => 'Sub Edit',<br /> :publish_ready => 'Publish Ready',<br /> :published => 'Published' }<br /> STATES.each do |key, value|<br /> define_method "#{key}?", {<br /> self.state == "#{value}"<br /> }<br /> end<br /> end<br />

<br />#Defines an instance method in the receiver. The method parameter can be a Proc or Method object. If a block is specified, it is used as the method body. This block is evaluated using instance_eval, a point that is tricky to demonstrate because define_method is private. (This is why we resort to the send hack in this example.)<br /><br /> class A<br /> def fred<br /> puts "In Fred"<br /> end<br /> def create_method(name, &block)<br /> self.class.send(:define_method, name, &block)<br /> end<br /> define_method(:wilma) { puts "Charge it!" }<br /> end<br /> class B < A<br /> define_method(:barney, instance_method(:fred))<br /> end<br /> a = B.new<br /> a.barney<br /> a.wilma<br /> a.create_method(:betty) { p self }<br /> a.betty<br /><br />produces:<br /><br /> In Fred<br /> Charge it!<br /> #<B:0x401b39e8><br />

step 這樣用

http://www.ruby-doc.org/core/classes/Range.html#M000708

<br />limit = 100<br />count = User.count<br />(1..count).step(limit) do |offset|<br /> User.all(:offset => offset, :limit => limit).each do |user|<br /> CACHE.delete("user_reply_list_#{user.id}")<br /> end<br />end<br />

respond_to,Graceful Degradation

Graceful Degradation
<br />def index<br /> @users = User.find(:all)<br /> respond_to do |format|<br /> format.js { <br /> render :update do |page|<br /> page.replace_html ‘content’, ‘<p>blah</p>’<br /> end<br /> }<br /> format.html #index.html.erb #browser不支援js, 會跑這個<br /> end<br />end<br />

Caching with Instance Variables

http://railscasts.com/episodes/1-caching-with-instance-variables

Dangers of Model in Session

http://railscasts.com/episodes/13

validate,valid?

http://api.rubyonrails.org/classes/ActiveRecord/Validations.html#M001627

<br /> class Person < ActiveRecord::Base<br /> protected<br /> def validate<br /> errors.add_on_empty %w( first_name last_name )<br /> errors.add("phone_number", "has invalid format") unless phone_number =~ /[0-9]*/<br /> end<br /><br /> def validate_on_create # is only run the first time a new object is saved<br /> unless valid_discount?(membership_discount)<br /> errors.add("membership_discount", "has expired")<br /> end<br /> end<br /><br /> def validate_on_update<br /> errors.add_to_base("No changes have occurred") if unchanged_attributes?<br /> end<br /> end<br /><br /> person = Person.new("first_name" => "David", "phone_number" => "what?")<br /> person.save # => false (and doesn't do the save)<br /> person.errors.empty? # => false<br /> person.errors.count # => 2<br /> person.errors.on "last_name" # => "can't be empty"<br /> person.errors.on "phone_number" # => "has invalid format"<br /> person.errors.each_full { |msg| puts msg }<br /> # => "Last name can't be empty\n" +<br /> "Phone number has invalid format"<br /><br /> person.attributes = { "last_name" => "Heinemeier", "phone_number" => "555-555" }<br /> person.save # => true (and person is now saved in the database)<br />

[JavaScript] 複製物件,copy,clone

http://blog.roodo.com/jaceju/archives/7611083.html

adv session,cookie

http://www.quarkruby.com/2007/10/21/sessions-and-cookies-in-ruby-on-rails
http://errtheblog.com/posts/22-sessions-n-such
http://scott.elitists.net/sessions.html
http://railscasts.com/episodes/13

cookie_store,session

http://railscasts.com/episodes/84-cookie-based-session-store
http://izumi.plan99.net/blog/index.php/2007/11/25/rails-20-cookie-session-store-and-security/
http://blog.caboo.se/articles/2007/2/21/new-controversial-default-rails-session-storage-cookies
http://stackoverflow.com/questions/192153/what-is-the-best-way-to-read-the-rails-session-secret
http://hi.baidu.com/holin/blog/item/36b9b21127f85e7ccb80c45e.html
http://api.rubyonrails.org/classes/ActionController/SessionManagement/ClassMethods.html#M000299

actionpack-2.1.2/lib/action_controller/session/cookie_store.rb
<br /> # Generate the HMAC keyed message digest. Uses SHA1 by default.<br /> def generate_digest(data)<br /> key = @secret.respond_to?(:call) ? @secret.call(@session) : @secret<br /> OpenSSL::HMAC.hexdigest(OpenSSL::Digest::Digest.new(@digest), key, data)<br /> end<br /><br /> private<br /> # Marshal a session hash into safe cookie data. Include an integrity hash.<br /> def marshal(session)<br /> data = ActiveSupport::Base64.encode64(Marshal.dump(session)).chop<br /> "#{data}--#{generate_digest(data)}"<br /> end<br /><br /> # Unmarshal cookie data to a hash and verify its integrity.<br /> def unmarshal(cookie)<br /> if cookie<br /> data, digest = cookie.split('--')<br /><br /> # Do two checks to transparently support old double-escaped data.<br /> unless digest == generate_digest(data) || digest == generate_digest(data = CGI.unescape(data))<br /> delete<br /> raise TamperedWithCookie<br /> end<br /><br /> Marshal.load(ActiveSupport::Base64.decode64(data))<br /> end<br /> end<br /><br />

BAh7ByIKZmxhc2hJQzonQWN0aW9uQ29udHJvbGxlcjo6Rmxhc2g6OkZsYXNo%0ASGF
zaHsABjoKQHVzZWR7ADoNbG9naW5faWQw--b410e484d58fa0b31c5e778115c66ea29a220af8

-- 前面是data的部份, 後面是digest的部份, data可以讓user 去decode 沒關係, 但是digest的部份有加上secret 去做encode, 所以可以用來辨識這是不是我們網站自己產生合法的cookie

adv cache,memcahe

http://nubyonrails.com/articles/about-this-blog-memcached
http://blog.leetsoft.com/2007/5/22/the-secret-to-memcached
http://blog.craigambrose.com/past/2007/11/13/caching_makes_your_brain_explode/
http://ryandaigle.com/articles/2007/12/19/what-s-new-in-edge-rails-pluggable-controller-caching
http://wiki.rubyonrails.org/rails/pages/MemCached
http://ihower.idv.tw/blog/archives/1768
http://www.ibm.com/developerworks/cn/web/wa-rails1/

Don’t Expire, Just Render it Obsolete

So, here’s my first bit of advice. If you’re building a real site, go straight to memcache. If you’re not building a site for big traffic, don’t cache, just optimise any really stupid queries that are giving you trouble. If you’re using memcache, be sure to run monit too.

雷霆王

http://www.ananedu.com/1230/b151.htm
六神合一的雷霆王　嗚～嗚～嗚

六神合一的雷霆王　嗚～嗚～嗚

保衛地球的安全我當先

對抗入侵的異形人不後人

六神合一的雷霆王　嗚～嗚～嗚

六神合一的雷霆王　嗚～嗚～嗚

保衛地球的安全我當先

對抗入侵的異形人不後人

六神合一的雷霆王　嗚～嗚～嗚

六神合一的雷霆王　嗚～嗚～嗚

啦．．．雷霆王～雷霆王

雷霆王是中視卡通，播出時間為780331～790629每週五下午五點。故事的主角是馬茲，他原是吉星人，在嬰兒時期即被送往地球，地球人收養了馬茲，為他取了個名字叫佩華，佩華長大後成為地球防衛軍的一員。一日地球遭莫名外星人攻擊，佩華發現入侵人會超能力，也在同時發現自己也有超能力，大戰數回合之後，外星人為佩華所打敗，對方於是呼喚機器人，佩華為機器人所敗，在生死交關之際，突然有個機器人來與佩華合體，是個紅色機器人，或可說是主機，當這主機遭遇困難時，又會有五架機器人飛來，最後又可組成六神合體的雷霆王，雷霆王一出來就不會輸。原來是吉星人要征服地球，於是要佩華的父親製造機械人，也就是雷霆王的主機，只要佩華一死，這主機便會產生可怕的核子反應，並進而消滅地球，可是佩華的父親卻另外造了五架機械人，這五個機械人便可和紅色主機結合成雷霆王。佩華最後終於摧毀了吉星人的野心，其實吉星人也不是真的野心很大，而是在其背後有個可怕的惡魔，這個惡魔名叫族魯，本來佩華是要以自身的滅亡來和族魯同歸於盡，可是還沒用族魯便被幹掉。到這裡是第一段落，佩華有個哥哥名叫馬可，因為不會超能力，所以常被排擠也常被忽視，但他長得非常俊俏，不過這和劇情沒什麼關係，也因為有馬可的幫助，佩華才能在許多的戰役中獲勝，可是馬可在第一段時便死掉了。第二個段落是某日有個外星女子來到了地球，原來他是被追殺的陰極超能力者，在她們的星球每個人都有超能力，但是超能力有分陰陽兩極，陰極超能力者被陽極超能力者追殺，殺到最後還是被佩華搞定，不過這場戰役是兩個組織對打，打到最後又發現是族魯搞的鬼，這是第二段落。第三段是形態人和馬茲對打，這時馬茲被套上了惡魔手環，每當佩華使用一次雷霆王，便會受到惡魔手環的痛苦煎熬，和孫悟空差不多吧！可是每當佩華在痛苦爭扎時都會聽到一句話：”燃燒的火焰，赤熱的星球”原來那星球便是太陽，那麼這句話又是誰說的呢？這句話便是馬可所說的，可是馬可不是死了嗎？好像是用托夢的，佩華到了太陽之後，馬可便為他解開了惡魔手環，最後終於打敗了族魯，可是就在這時，族魯手下的形態人好像是有七人吧！這七人合在一起又組成了族魯，天啊！這一次族魯又再次被打敗，好像族真的被打敗了，因為雷霆王真的沒有再演了。

db,connection,execute,sql

http://wiki.rubyonrails.org/rails/pages/HowtoQueryTheDatabaseDirectly
http://api.rubyonrails.org/classes/ActiveRecord/Base.html#M001794

<br />require "memcache"<br /><br />CACHE_SERVERS = []<br />rs = ActiveRecord::Base.connection.execute('select * from memcached_servers')<br />rs.each { |r| CACHE_SERVERS << r }<br />CACHE_SERVERS.flatten!<br />CACHE = MemCache.new(GOOKUS_CACHE_SERVERS)<br />

yaml,load_file

http://corelib.rubyonrails.org/classes/YAML.html

yml file

  defaults:
    ttl: 1800
    readonly: false
    urlencode: false
    c_threshold: 10000
    compression: true
    debug: false
    namespace: lalala
    sessions: false
    fragments: true
    servers: localhost:11212
    benchmarking: true
 

>>YAML.load_file("file_name")
>>{"defaults"=>{"sessions"=>false, "ttl"=>1800, "readonly"=>false, "fragments"=>true, "c_threshold"=>10000, "benchmarking"=>true, "namespace"=>"youholder", "debug"=>false, "servers"=>"localhost:11212", "urlencode"=>false, "compression"=>true}}

memcached,cache

http://bbs.railschina.com/viewthread.php?tid=535
http://totou-phpmysql.blogspot.com/2008/07/memcached.html
http://www.danga.com/memcached/
http://nubyonrails.com/articles/memcached-basics-for-rails
http://www.gisblogs.net/post/183.html

cache in rails 2.1

http://railscasts.com/episodes/115-caching-in-rails-2-1
http://thewebfellas.com/blog/2008/6/9/rails-2-1-now-with-better-integrated-caching

cache的用法
<br /><br /># Write a string to the cache<br />Rails.cache.write('test_key', 'test_value')<br />=> true<br /><br /># Read it back in<br />Rails.cache.read('test_key')<br />=> 'test_value'<br /><br /># Delete the item<br />Rails.cache.delete('test_key')<br />=> true<br /><br />#find, if does not exist create<br />Rails.cache.fetch('now') { Time.now}<br /><br /><br />

有幾種cache 機制
<br /><br /># Use the memory store - this store has no options<br />config.cache_store = :memory_store<br /><br /># Use the file store with a custom storage path (if the directory doesn’t already exist it will be created)<br />config.cache_store = :file_store, '/my_cache_path'<br /><br /># Use the memcached store with default options (localhost, TCP port 11211)<br />config.cache_store = :mem_cache_store<br /><br /># Use the memcached store with an options hash<br />config.cache_store = :mem_cache_store, 'localhost', '192.168.1.1:1001', :namespace => 'test'<br /><br />

自己生個cache object
<br /><br /># Create a separate memory cache in addition to the global Rails cache<br />my_cache = ActiveSupport::Cache.lookup_store(:memory_cache)<br /><br />

幫助你生cache_key
<br /><br />>> u = User.first<br />=> #<user><br />>> u.cache_key<br />=> "users/1-20081114035214"<br />

memcachestore 是production 常選用的方式, default 存入是存成marshal
<br /># Write a raw value to the cache<br />Rails.cache.write('test_key', 1, :raw => true)<br /><br /># Read a raw value from the cache<br />Rails.cache.read('test_key', :raw => true)<br /><br /># Write a value using the add method and setting expiry to 15 minutes<br />Rails.cache.write('test_key', 'test_value', :unless_exist => true, :expires_in => 15.minutes)<br /><br />

Marshal

http://www.ruby-doc.org/core/classes/Marshal.html

Ruby can take an object and convert it into a stream of bytes that can be stored
outside the application. This process is called marshaling. This saved object
can later be read by another instance of the application (or by a totally separate
application), and a copy of the originally saved object can be reconstituted

<br />>> str = Marshal.dump('abcd')<br />=> "\004\b\"\tabcd"<br />>> str1 = Marshal.restore(str)<br />=> "abcd"<br />

使用METHOD_MISSING時請小心

<br />class Dog<br /> def method_missing(method, *args, &block)<br /> if method.to_s =~ /^bark/<br /> puts "woofwoof!"<br /> else<br /> super<br /> end<br /> end<br />end<br /><br />rex = Dog.new<br />rex.bark #=> woofwof!<br />rex.bark! #=> woofwoof!<br />rex.bark_and_run #=> woofwoof!<br />

rex.respond_to? :bark #=> false <= 我們用respond_to? 檢查時會以為沒有這東西
rex.bark #=> woofwoof!

所以要加上 repsond_to?(method) method
<br />class Dog<br />METHOD_BARK = /^bark/<br /> def respond_to?(method)<br /> return true if method.to_s =~ METHOD_BARK<br /> super<br /> end<br /><br /> def method_missing(method, *args, &block)<br /> if method.to_s =~ METHOD_BARK<br /> puts "woofwoof!"<br /> else<br /> super<br /> end<br /> end<br />end<br />rex = Dog.new<br />rex.respond_to?(:bark) #=> true<br />rex.bark #=> woofwoof!<br /><br />

tasks,ruby1.9

ruby script/dbconsole

另外，在Ruby 1.9中去掉了Base64模組(base64.rb)，因此在Rails中所有使用這個模組的都得
修改為ActiveSupport::Base64

railsties

Rails.public_path
Rails.logger
Rails.root
Rails.env
Rails.cache
Rails.version

rails2.1 gem

http://lightyror.thegiive.net/2008/06/rails-21-gem.html
http://ryandaigle.com/articles/2008/4/1/what-s-new-in-edge-rails-gem-dependencies

Routes recognition

actionpack-2.1.2/lib/action_controller/routing/recognition_optimisation.rb

blog 貼code

http://morten.lyhr.dk/2007/12/how-to-get-syntax-highlighting-in.html
http://yehhou.blogspot.com/2007/06/blogger-dpsyntaxhighlighter.html

下面這些貼在 head tag 裡
<link type="text/css" rel="stylesheet" href="http://lake.ilakela.googlepages.com/SyntaxHighlighter.css"></link>
<br /><script language="javascript" src="http://lake.ilakela.googlepages.com/shCore.js"></script><br /><script language="javascript" src="http://lake.ilakela.googlepages.com/shBrushJScript.js"></script><br /><script language="javascript" src="http://lake.ilakela.googlepages.com/shBrushPhp.js"></script><br /><script language="javascript" src="http://lake.ilakela.googlepages.com/shBrushRuby.js"></script><br /><script language="javascript" src="http://lake.ilakela.googlepages.com/shBrushSql.js"></script><br /><script language="javascript" src="http://lake.ilakela.googlepages.com/shBrushJScript.js"></script> <br /><script language="javascript" src="http://lake.ilakela.googlepages.com/shBrushXml.js"></script> <br />

下面的放在 body tag 前
<br /><script class='javascript'><br /> function FindTagsByName(container, name, Tag)<br /> {<br /> var elements = document.getElementsByTagName(Tag);<br /> for (var i = 0; i < elements.length; i++)<br /> {<br /> if (elements[i].getAttribute("name") == name)<br /> {<br /> container.push(elements[i]);<br /> }<br /> }<br /> }<br /> var elements = [];<br /> FindTagsByName(elements, "code", "pre");<br /> FindTagsByName(elements, "code", "textarea");<br /> <br /> for(var i=0; i < elements.length; i++) {<br /> if(elements[i].nodeName.toUpperCase() == "TEXTAREA") {<br /> var childNode = elements[i].childNodes[0];<br /> var newNode = document.createTextNode(childNode.nodeValue.replace(/<br\s*\/?>/gi,'\n'));<br /> elements[i].replaceChild(newNode, childNode);<br /> <br /> }else if(elements[i].nodeName.toUpperCase() == "PRE") {<br /> brs = elements[i].getElementsByTagName("br");<br /> for(var j = 0, brLength = brs.length; j < brLength; j++) {<br /> var newNode = document.createTextNode("\n");<br /> elements[i].replaceChild(newNode, brs[0]);<br /> }<br /> }<br /> }<br /> dp.SyntaxHighlighter.HighlightAll("code");<br /></script><br /><br />

Destroy Without JavaScript

http://railscasts.com/episodes/77-destroy-without-javascript

<!-- projects/index.rhtml -->
<ul>
<% for project in @projects %>
 <li>
   <%=h project.name %>
   <%= link_to_destroy "Destroy", project_path(project), confirm_destroy_project_path(project) %>
 </li>
<% end %>
</ul>

<!-- projects/confirm_destroy.rhtml -->
<% form_for :project, :url => project_path(@project), :html => { :method => :delete } do |f| %>
 <h2>Are you sure you want to destroy this project?</h2>
 <p>
   <%= submit_tag "Destroy" %>
   or <%= link_to "cancel", projects_path %>
 </p>
<% end %>


# routes.rb
map.resources :projects, :member => { :confirm_destroy => :get }

# projects_controller.rb
def confirm_destroy
 @project = Project.find(params[:id])
end

# projects_helper.rb
def link_to_destroy(name, url, fallback_url)
 link_to_function name, "confirm_destroy(this, '#{url}')", :href => fallback_url
end


/* application.js */
function confirm_destroy(element, action) {
  if (confirm("Are you sure?")) {
    var f = document.createElement('form');
    f.style.display = 'none';
    element.parentNode.appendChild(f);
    f.method = 'POST';
    f.action = action;
    var m = document.createElement('input');
    m.setAttribute('type', 'hidden');
    m.setAttribute('name', '_method');
    m.setAttribute('value', 'delete');
    f.appendChild(m);
    f.submit();
  }
  return false;
}

regexp,uri,cgi,encode,decode

http://snippets.dzone.com/posts/show/5180
http://ruby-doc.org/stdlib/libdoc/uri/rdoc/classes/URI/Escape.html#M009386
http://ruby-doc.org/stdlib/libdoc/cgi/rdoc/classes/CGI.html#M000091

[^abc] Any single character but a, b, or c

 1 
   2  require 'cgi'
   3 
   4  # escape
   5  name = "ruby?"
   6  value = "yes"
   7  url = "http://example.com/?" + CGI.escape(name) + '=' + CGI.escape(value) + "&var=T"
   8  # url: http://example.com/?ruby%3F=yes&var=T
   9  html = %(<a href="#{CGI.escapeHTML(url)}">example</a>)
  10  # html: <a href="http://example.com/?ruby%3F=yes&amp;var=T">example</a>
  11 
  12  # unescape
  13  name_encoded = html.match(/http:([^"]+)/)[0]
  14  # name_encoded: http://example.com/?ruby%3F=yes&amp;var=T
  15  href = CGI.unescapeHTML(name_encoded)
  16  # href: http://example.com/?ruby%3F=yes&var=T
  17  query = href.match(/\?(.*)$/)[1]
  18  # query: ruby%3F=yes&var=T
  19  pairs = query.split('&')
  20  # pairs: ["ruby%3F=yes", "var=T"]
  21  name, value = pairs[0].split('=').map{|v| CGI.unescape(v)}
  22  # name, value: ["ruby?", "yes"]

command,route,respond

1)rake routes 可以秀出所有的route 跟其對應的function

2)就算沒有特別寫respond_to ,rails 也會根據format 去找其相退應的file

atom_feed,rss

http://railscasts.com/episodes/87-generating-rss-feeds
http://svn.rubyonrails.org/rails/plugins/atom_feed_helper/README
http://api.rubyonrails.com/classes/ActionView/Helpers/AtomFeedHelper.html#M001208
http://hideto.javaeye.com/blog/84463
http://snippets.dzone.com/tags/ruby/blinksale
http://railspikes.com/2008/10/1/publishing-non-activerecord-objects-in-an-atom-feed-with-rails

atom_feed do |feed|
 feed.title("All User Books!")
 feed.updated((@users.first.created_at))

 for user in @users
   feed.entry(user) do |entry|
     entry.title(user.name)
     entry.content(user.name, :type => 'html')

     entry.books do |books|  <= 幹 這個地方不用再傳東西, entry.book(fuck)
       for b in user.books
         books.title(b.name)
       end
     end
   end
 end
end

<?xml version="1.0" encoding="UTF-8"?> 
<feed xml:lang="en-US" xmlns="http://www.w3.org/2005/Atom">
 <id>tag:localhost,2005:/people</id>
 <link type="text/html" rel="alternate" href="http://localhost:25001"/>
 <link type="application/atom+xml" rel="self" href="http://localhost:25001/people.atom"/>
 <title>My great blog!</title>
 <updated>2008-11-04T00:31:17Z</updated>
 <entry>
   <id>tag:localhost,2005:User/1</id>
   <published>2008-11-04T00:31:17Z</published>
   <updated>2008-11-04T00:31:17Z</updated>
   <link type="text/html" rel="alternate" href="http://localhost:25001/people/1"/>
   <title>ilake</title>
   <content type="html">ilake</content>
   <books>
     <title>book123</title>
     <title>bbbb</title>
   </books>
 </entry>
 <entry>
   <id>tag:localhost,2005:User/2</id>
   <published>2008-11-09T16:39:09Z</published>
   <updated>2008-11-09T16:39:09Z</updated>
   <link type="text/html" rel="alternate" href="http://localhost:25001/people/2"/>
   <title>lake2</title>
   <content type="html">lake2</content>
   <books>
     <title>[lake2]lake 2 book</title>
   </books>
 </entry>
</feed>

strain, 寫成這樣好醜 XD

        if params[:type]
          SmsRecord.sys
        else
          SmsRecord.purchase
        end.find(:all, :conditions => cond).each do |row|
          csv << [row.id, row.sms_purchase_record_id, row.user_id, row.send_to_sms_at.strftime('%Y/%m/%d %H:%M'), row.sms_rsp_code]
        end
       

Complex Forms

http://railscasts.com/episodes/73
http://railscasts.com/episodes/74
http://railscasts.com/episodes/75
http://api.rubyonrails.org/classes/ActionView/Helpers/PrototypeHelper/JavaScriptGenerator/GeneratorMethods.html#M001254
http://api.rubyonrails.org/classes/ActionView/Helpers/JavaScriptHelper.html#M001341

[View edit.rhtml]
<div id='books'>
 <%= render :partial => 'book', :collection => @user.books %>
</div>
<%= add_book_link 'add book'%>


[user helper]
module UsersHelper
def add_book_link(name)
    link_to_function name do |page|
      page.insert_html :bottom, :books, :partial => 'book', :object => Book.new
    end
end
end

[View book partial]

<% fields_for "user[books][]", book do |b| %>
<%= b.text_field :name %>
<%= link_to_function 'remove', "this.up('.book').remove()"%>
<% end %>



下面是強化版

[view, edit.rhtml]
<div class='book'>
<% fields_for "user[books][]", book, :index => nil do |b| %>
  <%= b.text_field :name %>
  <% if book.new_record?%>
    <%= link_to_function 'remove', "this.up('.book').remove()" %><br /> <= 單純移掉 html, 反正是new出來的還沒存
  <% else %>
    <%= link_to_function 'remove', 'mark_for_destory(this)' %>
    <%= b.hidden_field :id %>           <= 原有的 object 把 id藏起來
    <%= b.hidden_field :should_destroy, :class => 'should_destroy' %> <= 用來記真的要砍的記號
  <% end %>
<% end %>
</div>


[js application.js]
function mark_for_destory(element) {
 $(element).next('.should_destroy').value = 1;   <= 做了記號後
 $(element).up('.book').hide();                           <= 藏起來
}

[Controller, user_controller.rb]
@user.update_attributes(params[:user])

[Model book.rb]
 attr_accessor :should_destroy

 def should_destroy?
   should_destroy.to_i == 1
 end

[Model user.rb]
 after_update :save_books

 def books=(books_attrs)
    books_attrs.each do |attrs|
      if attrs[:id].blank?          <= 如果id是空的就是需要new的
        books.build(attrs)
       else
        book = books.detect{|b| b.id == attrs[:id].to_i}
        book.attributes = attrs   <= 這時上面那些有被destroy 的 should_destroy 也會被給值
      end
    end
 end

 def save_books   <= parent object update_attribute would not update the children attribute, so we need to save by ourself
   books.each do |book|
     if book.should_destroy?
       book.destroy
     else
       book.save # if Calling save(false) saves the model without running validations.
     end
   end
 end

clone

http://api.rubyonrails.org/classes/ActiveRecord/Base.html#M001761


Returns a clone of the record that hasn‘t been assigned an id yet and is treated as a new record. Note that this is a "shallow" clone: it copies the object‘s attributes only, not its associations. The extent of a "deep" clone is application-specific and is therefore left to the application to implement according to its need.

>> u = User.first
=> #<User id: 1, name: "ilake", created_at: "2008-11-04 00:31:17", updated_at: "2008-11-04 00:31:17">
>> uc = u.clone
=> #<User id: nil, name: "ilake", created_at: "2008-11-04 00:31:17", updated_at: "2008-11-04 00:31:17">
>> uc.books
=> []
>> uc.name
=> "ilake"
>> uc.new_record?
=> true

with_options

http://railscasts.com/episodes/42-with-options

 map.with_options :controller => 'membercenter' do |t|
   t.partner_login  'membercenter/plogin',  :action => 'partner_login'
   t.partner_signup 'membercenter/psignup', :action => 'partner_signup'
   t.partner_logout 'membercenter/plogout', :action => 'partner_logout'
   t.default        'membercenter/:action'
 end


def index
  FaqCommon.with_options :order => "created_at DESC", :limit => 9 do |faqcommon|
    @member_faqs = faqcommon.find(:all, :conditions => ["title_type = ?", 0] )
    @use_faqs =    faqcommon.find(:all, :conditions => ["title_type = ?", 1] )
  end
end

Handle Multiple Models in One Form Handle Multiple Models in One Form

http://www.pragprog.com/titles/fr_arr/advanced-rails-recipes
http://api.rubyonrails.org/classes/ActionView/Helpers/FormHelper.html#M001198

Recipe 13

[View, edit.rhtml]
<% form_for(@user) do |f| %>
  <%= f.text_field :name %>
  <% for book in @user.books %>
    <% fields_for "user[books][]", book do |b| %> <= 用fields_for的方法注意
      <%= b.text_field :name %>
    <% end %>
  <% end %>
    <%= f.submit "Update" %>
<% end %>

[user controller, update action]
  def update
    @user = User.find(params[:id])

      if @user.update_attributes(params[:user])
        flash[:notice] = 'User and books was successfully updated.'
        redirect_to(@user)
      end

    params[:user] 是長像這樣的東西 {"name"  => "ilake",
                                    "books" => {"1"=>{"name"=>"book1"}, "2"=>{"name"=>"book2"}}}
    update_attributes 就是去做 @user.name = 'ilake'
                               @user.books = {"1"=>{"name"=>"book1"}, "2"=>{"name"=>"book2"}} 的動作
  end

[user model]
class User < ActiveRecord::Base
  has_many :books, :dependent => :destroy
  has_one  :couple
  validates_presence_of :name

  after_update :save_books
     
  def books=(books_attrs)               <= 因為controller 的@user.update_attributes 被叫到
    books.reject(&:new_record?).each do |book|  <= 檢查這是不是新的record, 這邊是update 新的不要
      attributes = books_attrs[book.id.to_s]
      if attributes
        book.attributes = attributes
      else
        books.delete(book)
      end
    end
  end

  def save_books
    books.each do |book|
      book.save(false) # Calling save(false) saves the model without running validations.
    end
  end
end

text_field,form

http://api.rubyonrails.org/classes/ActionView/Helpers/FormHelper.html#M001197

 <% form_tag :action => 'edit_all' do %>
   <% for @user in @users %>      <= 一定要用@user, for iterator 才能這樣用
       <%= text_field('user[]', 'name') %> <= []會自己讓他塞id, 變成 <input type="text" value="ilake" size="30" name="user[1][name]" id="user_1_name"/>
       <% fields_for @user.couple do |couple| %>
           <%= couple.text_field :name %>
       <% end %>
   <% end %>
   <%= submit_tag 'EDIT_ALL'%>
 <% end %>

rails,json

[view]
<script type="text/javascript">
  (function($){
   $(document).ready(function(){
       var user_id = {};
       user_id['user_id'] = '<%= @user.id %>';

       $.ajax({
          url:  '/people/<%= @user.id %>/books',
          type: 'GET',
          data: user_id,
          dataType: 'json',                     <= 要指定型態
          success:function(data){               <= 出來是個json object array
          $.each(data, function(){
            $('#script').append('<li>'+this.book.name+'</li>');
            });
          }
        });
 
       });
   })(jQuery);
</script>

<ul id='script'></ul>

[controller ]
  def index
    @books = @user.books.find(:all)

    respond_to do |format|
      format.html # index.html.erb
      format.xml  { render :xml => @books.to_xml }
      format.js { render :json => @books.to_json }
      format.yaml  { render :text => @books.to_yaml }
    end
  end

polymorphic,rest

http://api.rubyonrails.com/classes/ActionController/PolymorphicRoutes.html#M000307
http://jamesgolick.com/2007/10/11/rails-polymorphic-url-generation-sucks-here-s-something-better

Iconv.conv big5 轉 utf8 , response

http://twycf.com/wordpress/archives/155
http://tzangms.com/blog/programming/1314

def reply_list
   html = GOOKUS_CACHE.get("nownews_reply_list_#{@nng.id}") <= get from memcache
   unless html
     @gookus = @nng.children.find(:all, :include => :user, :limit => limit, :order => 'created_at DESC')
     html    = render_to_string(:template => 'gookus/nownews', :layout => false)
     GOOKUS_CACHE.set("nownews_reply_list_#{@nng.id}", html, 1.day) <= set into memcache
   end

   unless params[:encoding] == 'utf8'
     html = Iconv.conv('big5','utf8',html)  <= 把html 內容 的編碼 utf8轉成 big5
     response.charset='big5'                <= charset 也要改
   end
   response.content_type= "text/javascript"<= 是要丟一個js回去 render js
   render :text => "document.write('#{escape_javascript(html)}' <= escape 過 內容
end

<br />#爆掉就不管<br />html = Iconv.conv('big5//TRANSLIT','utf8',html)<br />

ActiveResource

http://www.ryandaigle.com/articles/2006/06/30/whats-new-in-edge-rails-activeresource-is-here#REST
http://www.therailsway.com/2007/9/3/using-activeresource-to-consume-web-services
http://ihower.idv.tw/blog/archives/1565
http://wiki.rubyonrails.org/rails/pages/ActiveResource

class Auction < ActiveResource::Base
  self.site = ‘http://localhost:3000’
end

verify

http://api.rubyonrails.org/classes/ActionController/Verification/ClassMethods.html#M000336

  verify :method => :post,
         :only => [ :goto ],
         :redirect_to => { :action => :index }

cache,page

http://www.javaworld.com.tw/jute/post/view?bid=59&id=191117&sty=3&age=0&tpg=1&ppg=1
http://api.rubyonrails.org/classes/ActionController/Caching/Pages.html#M000282

# In Rails 2.1 you can use :if option
caches_page :index, :if => Proc.new { |c| !c.request.format.json? } <=不是json才會cache

session

http://api.rubyonrails.org/classes/ActionController/SessionManagement/ClassMethods.html

routes,conditions,requirement

  map.with_options :conditions => { :subdomain => MIRRORS_REGEX} do |goyou_map|
    goyou_map.target 'target/:type/:type_id/:sort',
      :controller   => 'target', :action => 'index',
      :defaults     => { :sort => 'target_id'
    },
    :requirements => { :type => /(category)|(concept)/,
      :sort => /(target_id)|(change_rate)|(volume)/
    }
  end
 
  conditions <= 必須符合這個條件才會apply, 不符合就繼續往下找
  requirement   <= 會符合這個 rule, 但是 paramter 需符合 requirement

rest, options

map.resources :users, as => 'people' do |user|
  user.resources :books, :collection => {:list => :get},
                         :member     => {:add_title  => :put},
                         :singular   => 'lala'
end


<% for book in @books %>
<tr>
  <td><%= book.name %></td>
  <td><%= link_to 'Show', user_lala_path(@user, book) %></td>
  <td><%= link_to 'Edit', edit_user_lala_path(@user, book) %></td>                                            
  <td><%= link_to 'add_title', add_title_user_lala_path(@user, book), :method => :put %></td>
  <td><%= link_to 'Destroy', user_lala_path(@user, book), :confirm => 'Are you sure?', :method => :delete %></td>
</tr>
<% end %>
</table>

<br />

<%= link_to 'New book', new_user_lala_path(@user) %>
<%= link_to 'GoTo user index', users_url %>
<%= link_to 'All books', list_user_books_url(@user) %>   <= plural 的還是一樣 沒變成lalas



http://localhost:25001/people/1/books  <= 生出的 uri

REST & RESTful & resources

http://ihower.idv.tw/blog/archives/1542
http://ihower.idv.tw/blog/archives/1545
http://ihower.idv.tw/blog/archives/1543
http://ihower.idv.tw/blog/archives/1561
http://api.rubyonrails.org/classes/ActionController/Resources.html#M000337

---

http://ihower.idv.tw/blog/archives/1541
http://www.prescod.net/rest/mistakes/
http://www.xml.com/pub/a/2004/03/17/udell.html
http://en.wikipedia.org/wiki/REST
http://ihower.idv.tw/blog/archives/1634

lightbox,facebox,jRails

http://ihower.idv.tw/blog/archives/1708
http://ennerchi.com/projects/jrails

lightbox,facebox,jRails

http://ihower.idv.tw/blog/archives/1708
http://ennerchi.com/projects/jrails
http://famspam.com/facebox

Rails Front-End

http://ihower.idv.tw/blog/archives/1707

Speeding Up Your Web Site, expire header in apache and lightted

http://developer.yahoo.com/performance/rules.html
http://httpd.apache.org/docs/1.3/mod/mod_expires.html
http://phaedo.cx/archives/2007/07/25/tools-for-optimizing-your-website-etag-and-expire-headers-in-django-apache-and-lighttpd/

gzip compression, apache settings, speed up

http://letmehaveblog.blogspot.com/2007/09/using-gzip-compression-in-web-servers.html
http://httpd.apache.org/docs/2.0/mod/mod_deflate.html
http://www.blogjava.net/site120/archive/2007/02/16/100073.html

bundle-fu,rails,plugin,compress,js, speed up

http://code.google.com/p/bundle-fu/
http://crazylion.wordpress.com/2007/10/30/bundle-fu/
http://agilewebdevelopment.com/plugins/bundle_fu