access children of a page in liquid templates (useful for building nav widgets)

app/models/page.rb

@@ -35,7 +35,7 @@ class Page
   named_scope :not_found, :where => { :slug => '404', :depth => 0, :published => true }
   
   ## behaviours ##
-  liquid_methods :title, :fullpath
+  # liquid_methods :title, :fullpath
   liquify_template :joined_parts
   
   ## methods ##
@@ -65,6 +65,10 @@ class Page
   def url
     "http://#{self.site.domains.first}/#{self.fullpath}.html"
   end
+  
+  def to_liquid(options = {})
+    Locomotive::Liquid::Drops::Page.new(self)
+  end
     
   protected
   

doc/TODO

@@ -1,5 +1,6 @@
 BOARD:  
 
+- access page children in liquid
 - new custom field types
   - boolean
   
@@ -16,6 +17,7 @@ BACKLOG:
 - new custom field types:
   - file
   - date
+  - belongs_to => association
 
 - refactoring admin crud (pages + layouts + snippets)
 - refactor slugify method (use parameterize + create a module)
@@ -23,6 +25,8 @@ BACKLOG:
 
 - tiny mce or similar for custom field text type.
 
+- sitemap
+
 BUGS:
 
 - custom fields: accepts_nested_attributes weird behaviour when creating new content type + adding random fields

lib/locomotive/liquid/drops/base.rb

@@ -4,6 +4,8 @@ module Locomotive
     module Drops  
       class Base < ::Liquid::Drop
         
+        @@forbidden_attributes = %w{_id _version _index}
+        
         class_inheritable_reader :liquid_attributes
         write_inheritable_attribute :liquid_attributes, []
         attr_reader :source

lib/locomotive/liquid/drops/content.rb

@@ -2,9 +2,7 @@ module Locomotive
   module Liquid    
     module Drops  
       class Content < Base
-    
+        
-        @@forbidden_attributes = %w{_id _version _index}
-    
         def before_method(meth)
           return '' if @source.nil?
       

lib/locomotive/liquid/drops/page.rb

@@ -0,0 +1,15 @@
+module Locomotive  
+  module Liquid    
+    module Drops    
+      class Page < Base
+        
+        liquid_attributes << :title << :fullpath
+        
+        def children
+          @children ||= liquify(*@source.children)
+        end
+        
+      end
+    end
+  end
+end

spec/lib/locomotive/liquid/drops/page_spec.rb

@@ -0,0 +1,48 @@
+require 'spec_helper'
+ 
+describe Locomotive::Liquid::Drops::Page do
+  
+  before(:each) do
+    @home = Factory.build(:page)
+    @home.stubs(:children).returns([
+      Page.new(:title => 'Child #1'), 
+      Page.new(:title => 'Child #2'),
+      Page.new(:title => 'Child #3')
+      ])
+    @home.children.last.stubs(:children).returns([
+      Page.new(:title => 'Child #3.1'),
+      Page.new(:title => 'Child #3.2')
+      ])
+  end
+  
+  context '#rendering' do
+    
+    context '#children' do
+      
+      it 'renders title of all children pages' do
+        content = render_template '{% for child in home.children %}{{ child.title }},{% endfor %}'
+        content.should == 'Child #1,Child #2,Child #3,'
+      end
+      
+    end
+    
+    context '#sub children' do
+      
+      it 'renders title of all sub children pages' do
+        content = render_template '{% for child in home.children.last.children %}{{ child.title }},{% endfor %}'
+        content.should == 'Child #3.1,Child #3.2,'
+      end
+    
+    end
+    
+  end
+  
+  def render_template(template = '', assigns = {})
+    assigns = {
+      'home' => @home
+    }.merge(assigns)
+    
+    Liquid::Template.parse(template).render assigns
+  end
+    
+end