DB: Integridade referencial

app/models/attachment.rb

@@ -25,14 +25,12 @@ class Attachment < ActiveRecord::Base
 		self.size = new_file.size
 	end
 
-	# Limpa o nome do arquivo
 	protected
 	def sanitize(filename)
 		filename = File.basename(filename)
 		filename.gsub(/[^\w\.\-]/, '_')
 	end
 
-	# Verifica se o arquivo é válido
 	def validate
 		if @tmp_file
 			errors.add("file") if @tmp_file.size == 0

app/models/course.rb

@@ -13,23 +13,32 @@
 
 class Course < ActiveRecord::Base
 
-	has_many :attachments, :order => "file_name"
-	has_many :wiki_pages, :order => "position"
-	
-	has_many :shoutbox_messages,
-	         :class_name => 'CourseShoutboxMessage',
-	         :foreign_key => "receiver_id",
-			 :order => 'id desc'
+	# Associacoes
+	has_many :attachments,
+	         :order => "file_name",
+	          :dependent => :destroy
+
+	has_many :events,
+	         :order => "time asc",
+	         :dependent => :destroy
 
 	has_many :news,
-			 :class_name => 'News',
 	         :foreign_key => "receiver_id",
-			 :order => 'id desc'
+	        :order => "id desc",
+	        :dependent => :destroy
 
-	has_many :events, :order => "time asc"
+	has_many :log_entries,
+	         :order => "created_at desc",
+	         :dependent => :destroy
 
-	has_many :log_entries, :order => "created_at desc"
+	has_many :wiki_pages,
+	         :order => "position",
+	         :dependent => :destroy
 
+	# Plugins
+	acts_as_paranoid
+
+	# Validacao
 	generate_validations
 	validates_uniqueness_of :short_name
 	validates_format_of :short_name, :with => /^[^0-9]/
@@ -41,15 +50,6 @@ class Course < ActiveRecord::Base
 		end
 	end
 
-	def after_destroy
-		associations = [:attachments, :wiki_pages, :shoutbox_messages, :news, :events]
-		associations.each do |assoc|
-			send("#{assoc}").each do |record|
-				record.destroy
-			end
-		end
-	end
-
 	def to_param
 		self.short_name
 	end

app/models/log_entry.rb

@@ -15,6 +15,8 @@ class LogEntry < ActiveRecord::Base
 	belongs_to :user
 	belongs_to :course
 
+	acts_as_paranoid
+
 	def reversible?() false end
 
 	def to_xml(options = {})

app/models/log_entry/wiki_log_entry.rb

@@ -31,8 +31,8 @@ class WikiDeleteLogEntry < WikiLogEntry
 	def undo!(current_user)
 		w = WikiPage.find_with_deleted(target_id)
 		w.update_attribute(:deleted_at, nil)
-        w.position = w.course.wiki_pages.maximum(:position) + 1
-        w.save!
+		w.position = w.course.wiki_pages.maximum(:position) + 1
+		w.save!
 		WikiRestoreLogEntry.create!(:target_id => w.id, :user_id => current_user.id,
 				:course => w.course)
 	end

app/models/user.rb

@@ -31,10 +31,7 @@ class User < ActiveRecord::Base
 	attr_protected :id, :salt
 	attr_accessor :password, :password_confirmation
 
-	has_many :shoutbox_messages,
-			 :class_name => 'UserShoutboxMessage',
-			 :foreign_key => "receiver_id",
-			 :order => 'id desc'
+	acts_as_paranoid
 
 	def User.find_by_login_and_pass(login, pass)
 		user = find(:first, :conditions => [ "login = ?", login ])