Hide redirected pages in collection for parent ids.

app/controllers/pages_controller.rb

@@ -96,7 +96,7 @@ class PagesController < ApplicationController
   end
 
   def all
-    @pages = Page.all :order => 'updated_at DESC', :conditions => {:redirect => nil}
+    @pages = Page.non_redirected.all :order => 'updated_at DESC'
   end
 
   def version

app/models/page.rb

@@ -30,6 +30,8 @@ class Page < ActiveRecord::Base
   before_validation_on_update :update_permalink
   after_update :create_redirect
 
+  named_scope :non_redirected, :conditions => {:redirect => nil}
+  
   def self.permalink(title)
     title.gsub(/[\/\.,;@\s]/, "_").gsub(/[\"\']/, "")
   end

app/views/pages/_form.html.haml

@@ -97,6 +97,6 @@
     |
     = link_to "Abbrechen", @page
     | Oberseite ändern:
-    = collection_select(:page, :parent_id, Page.all, :id, :permalink, {:prompt => "Neue Oberseite?", :include_blank => true})
+    = collection_select(:page, :parent_id, Page.non_redirected, :id, :permalink, {:prompt => "Neue Oberseite?", :include_blank => true})
 
 %div(style="clear:right; height:1px")