Modification of the page model

app/helpers/application_helper.rb

@@ -54,9 +54,9 @@ module ApplicationHelper
     if node
       case node._type
         when 'Page'
-          dest = admin_page_path(:id => node.id)
+          dest = admin_page_path(node)
         when 'Link'
-          dest = admin_link_path(:id => node.id)
+          dest = admin_link_path(node)
       end
       ret << "<li>"
       ret << (link_to node.name, dest)

app/models/layout.rb

@@ -1,20 +1,21 @@
 class Layout
    
-   include Mongoid::Document
+  include Mongoid::Document
   include Mongoid::Timestamps
-   
-   field :name, :index => true
-   field :description
-   field :content
-   
-   references_many :children, :class_name => "Item"
-   
-   validates_presence_of :name
-   validates_format_of :name, :with => /^[0-9a-zA-Z\-_]+$/
-   validates_uniqueness_of :name
-   
-   def self.exist_one?
-      Layout.count > 0
-   end
+
+  field :name, :index => true
+  field :description
+  field :content
+
+  references_many :children, :class_name => "Item"
+  has_many :layout_parts
+
+  validates_presence_of :name
+  validates_format_of :name, :with => /^[0-9a-zA-Z\-_]+$/
+  validates_uniqueness_of :name
+
+  def self.exist_one?
+    Layout.count > 0
+  end
    
 end

app/models/layout_part.rb

@@ -0,0 +1,11 @@
+class LayoutPart
+   
+  include Mongoid::Document
+  include Mongoid::Timestamps
+
+  field :name
+  field :content
+
+  belongs_to :layout
+
+end

app/models/page.rb

@@ -9,6 +9,7 @@ class Page < Item
   validates_presence_of :layout_name, :layout_id
   
   referenced_in :layout
+  has_many :page_parts
   
   protected
   

app/models/page_part.rb

@@ -0,0 +1,11 @@
+class PagePart
+   
+  include Mongoid::Document
+  include Mongoid::Timestamps
+
+  field :name
+  field :content
+
+  belongs_to :page
+
+end

lib/parser.rb

@@ -1,10 +1,7 @@
 module Parser
   
-  def parser_context(page_content, attributes = {})
+  def parser_context(page, attributes = {})
     Radius::Context.new do |c|
-      c.define_tag 'content' do |tag|
-        page_content
-      end
       c.define_tag 'snippet' do |tag|
         snippet = Snippet.first(:conditions => {:name => tag.attr['name']})
         if snippet
@@ -72,6 +69,13 @@ module Parser
           res << '>'
         end
       end
+      c.define_tag 'layout_part' do |tag|
+        ret = ''
+        ret << "<div id='#{tag.attr['name']}'>"
+        ret << (page.page_parts.detect{ |p| p.name.to_s == tag.attr['name'].to_s }).content rescue ''
+        ret << tag.expand
+        ret << '</div>'
+      end
     end
   end
   
@@ -83,11 +87,11 @@ module Parser
   
   def parse_page(page)
     if page._type == 'Page'
-    layout_content = (page.layout)? page.layout.content : "<r:content />"
-    context = parser_context(page.content)
-    parser = Radius::Parser.new(context, :tag_prefix => 'r')
-    parser.parse(parser.parse(layout_content))
-  end
+      layout_content = page.layout.content 
+      context = parser_context(page)
+      parser = Radius::Parser.new(context, :tag_prefix => 'r')
+      parser.parse(parser.parse(layout_content))
+    end
   end
   
   def self.included(base)

lib/tasks/dev.rake

@@ -32,6 +32,8 @@ namespace :dev do
     var_11 = I18nVariable.create!( :document_class => 'Page', :key => 'about', :en => 'About', :zh_tw => '關於我們' )
     var_12 = I18nVariable.create!( :document_class => 'Link', :key => 'google', :en => 'Google', :zh_tw => 'Google' )
 
+
+    # TODO: modify for the new model
     urm_1 = UserRoleModel.new( :key => 'teacher', :i18n_variable_id => var_1.id, :built_in => true )
     urm_1.attribute_models.build( :key => 'discipline', :locale => true, :i18n_variable_id => var_2.id, :markup => 'text_field', :list_options => [], :built_in => true )
     urm_1.attribute_models.build( :key => 'department', :locale => true, :i18n_variable_id => var_3.id, :markup => 'text_field', :list_options => [], :built_in => true )
@@ -45,11 +47,17 @@ namespace :dev do
     uim_1.attribute_models.build( :key => 'first_name', :locale => true, :i18n_variable_id => var_9.id, :markup => 'text_field', :list_options => [], :built_in => true )
     uim_1.save! 
     
-    layout = Layout.create!( :name => 'root', :description => 'root', :content => File.open("#{RAILS_ROOT}/lib/template/root.layout").read )  
     
-    home = Page.create!( :i18n_variable_id => var_10.id, :layout_id => layout.id, :name => 'home', :is_published => true, :content => File.open("#{RAILS_ROOT}/lib/template/root.home").read )
+    layout = Layout.create!( :name => 'root', :description => 'root', :content => File.open("#{RAILS_ROOT}/lib/template/root.layout").read )
+    layout.layout_parts.create!( :name => 'header', :content => "<r:language_bar /><r:snippet name='nav' />" )
+    layout.layout_parts.create!( :name => 'main_content' )
+    layout.layout_parts.create!( :name => 'footer', :content => "<r:snippet name='footer' />" )
     
-    Page.create!( :i18n_variable_id => var_11.id, :layout_id => layout.id, :name => 'about', :is_published => true, :parent_id => home.id, :content => File.open("#{RAILS_ROOT}/lib/template/about.page").read )                      
+    home = Page.create!( :i18n_variable_id => var_10.id, :layout_id => layout.id, :name => 'home', :is_published => true )
+    home.page_parts.create!( :name => 'main_content', :content => "<r:locale en='This is the homepage' zh_tw='這是首頁' />" )
+    
+    about = Page.create!( :i18n_variable_id => var_11.id, :layout_id => layout.id, :name => 'about', :is_published => true, :parent_id => home.id )    
+    about.page_parts.create!( :name => 'main_content', :content => "This is about" )                  
     
     Link.create!( :i18n_variable_id => var_12.id, :name => 'google', :is_published => true, :parent_id => home.id, :url => 'www.google.com' )
     

lib/template/root.layout

@@ -8,18 +8,17 @@
   </head>
 
   <body>
-    <div id="header">
+		<r:layout_part name='header'>
       <r:language_bar />
       <r:snippet name='nav' />
-    </div>
+		</r:layout_part>
       
-	  <div id="container">  
-		  <r:content />	
-	  </div>
+	  <r:layout_part name="main_content">	
+	  </r:layout_part>
 
-    <div id="footer">        
+    <r:layout_part name="footer">        
       <r:snippet name='footer' />
-    </div>
+    </r:layout_part>
       
   </body>
 </html>