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 />

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

routes with_options

http://api.rubyonrails.org/classes/ActionController/Routing.html
http://ihower.idv.tw/blog/
http://weblog.jamisbuck.org/2007/1/24/object-with_options

#Object#with_options

最常用在 routes.rb，不過其實任意物件都可以用，他會將參數自動 merge 到 method call 的 hash 參數：

 map.with_options( :controller => "people" ) do |p|
   p.root :action => "index"
   p.about :action => "about"
 end

這樣替route 取名root , about
rails 替我們提供了url, path

root_url 可以替我們建出full path
而
root_path 建出的是URI path ( 沒包含host 的部份)

redirect_to root_path