Create a redirect when editing the title of a page.

app/controllers/pages_controller.rb

@@ -1,7 +1,7 @@
 class PagesController < ApplicationController
 
   def index
-    @page = Page.find_by_permalink "home"
+    @page = Page.find_by_permalink "Home"
 
     if @page
       render :action => 'show'
@@ -15,6 +15,9 @@ class PagesController < ApplicationController
 
     if @page.nil?
       redirect_to new_page_path(:title => params[:permalink])
+    elsif @page.redirect?
+      flash[:notice] = "Weitergeleitet von #{@page.title} ..."
+      redirect_to wiki_page_path(Page.find(@page.redirect).permalink)
     end
   end
 
@@ -79,7 +82,7 @@ class PagesController < ApplicationController
   end
 
   def all
-    @pages = Page.all :order => 'created_at'
+    @pages = Page.all :order => 'created_at', :conditions => {:redirect => nil}
   end
 
   def version

app/helpers/pages_helper.rb

@@ -38,7 +38,6 @@ module PagesHelper
 
       toc << "#" * number + " #{name}\n"
     end
-    logger.debug("TOC: #{toc}")
     toc = Wikitext::Parser.new.parse toc
 
     toc.gsub(/<li>([^<>\n]*)/) do

app/models/page.rb

@@ -18,20 +18,43 @@ class Page < ActiveRecord::Base
   belongs_to :user, :foreign_key => 'updated_by'
 
   acts_as_versioned :version_column => :lock_version
-  self.non_versioned_columns += ['permalink', 'created_at']
+  self.non_versioned_columns += ['permalink', 'created_at', 'title']
+
+  attr_accessor :old_title # Save title to create redirect page when editing title
 
   validates_presence_of :title, :body
-  validates_uniqueness_of :permalink
+  validates_uniqueness_of :permalink, :title
 
   before_validation_on_create :set_permalink
+  before_validation_on_update :update_permalink
+  after_update :create_redirect
 
   def self.permalink(title)
-    Wikitext::Parser.new.parse "[[#{title}]]"
+    title.gsub(" ", "_")
   end
 
   def set_permalink
-    unless self.permalink.blank?
+    unless title.blank?
       self.permalink = Page.count == 0 ? "Home" : Page.permalink(title)
     end
   end
+
+  protected
+
+  def update_permalink
+    if changed.include?("title")
+      set_permalink
+      self.old_title = changes["title"].first # Save title for creating redirect
+    end
+  end
+
+  def create_redirect
+    unless old_title.blank?
+      Page.create :redirect => id,
+        :title => old_title,
+        :body => "Weiterleitung auf [[#{title}]]..",
+        :permalink => Page.permalink(old_title),
+        :updated_by => updated_by
+    end
+  end
 end

app/views/pages/version.html.haml

@@ -1,4 +1,4 @@
-- title @version.title 
+- title @page.title 
 
 #page-versions{:style => "float:right"}
   %b= "Version vom #{format_datetime @version.updated_at}"

config/routes.rb

@@ -1,7 +1,7 @@
 ActionController::Routing::Routes.draw do |map|
   map.resources :pages, :collection => { :all => :get }, :member => {:version => :get, :revert => :get}
-  map.wiki_page "/wiki/:permalink", :controller => 'pages', :action => 'show', :permalink => /[\w\._\-\%\d]+/
+  map.wiki_page "/wiki/:permalink", :controller => 'pages', :action => 'show', :permalink => /[^\s]+/
-  map.wiki "/wiki", :controller => 'pages', :action => 'show', :permalink => 'home'
+  map.wiki "/wiki", :controller => 'pages', :action => 'show', :permalink => 'Home'
 
   map.logout '/logout', :controller => 'login', :action => 'logout'
   map.my_profile '/home/profile', :controller => 'home', :action => 'profile'

db/migrate/20090325175756_create_pages.rb

@@ -6,6 +6,7 @@ class CreatePages < ActiveRecord::Migration
       t.string :permalink
       t.integer :lock_version, :default => 0
       t.integer :updated_by
+      t.integer :redirect
 
       t.timestamps
     end