Clean Deletions

Deleting a page removes all revisions of that page.
Deleting a Web removes all pages (and all revisions thereof)
  and all wiki_files belonging to that Web.

app/controllers/admin_controller.rb

@@ -112,7 +112,6 @@ class AdminController < ApplicationController
   def delete_web
     return unless is_post
     if wiki.authenticate(params['system_password_delete_web'])
-      @web.remove_pages(@web.select_all)
       wiki.delete_web(@web_name)
       flash[:info] = "Web \"#{@web_name}\" has been deleted."
       redirect_to :controller => 'wiki', :action => 'web_list'

app/models/page.rb

@@ -1,6 +1,6 @@
 class Page < ActiveRecord::Base
   belongs_to :web
-  has_many :revisions, :order => 'id'
+  has_many :revisions, :order => 'id', :dependent => :destroy
   has_many :wiki_references, :order => 'referenced_name'
   has_one :current_revision, :class_name => 'Revision', :order => 'id DESC'
 

app/models/web.rb

@@ -1,6 +1,6 @@
 class Web < ActiveRecord::Base
-  has_many :pages
-  has_many :wiki_files
+  has_many :pages, :dependent => :destroy
+  has_many :wiki_files, :dependent => :destroy
 
   def wiki
     Wiki.new