Multiplos semestres

app/models/course.rb

@@ -43,8 +43,11 @@ class Course < ActiveRecord::Base
 	
 	# Validacao
 	generate_validations
-	validates_uniqueness_of :short_name
 	validates_format_of :short_name, :with => /^[^0-9]/
+
+	def related_courses
+		Course.find(:all, :conditions => [ 'short_name = ?', self.short_name], :limit => 4, :order => 'period desc')
+	end
 	
 	def after_create
 		App.inital_wiki_pages.each do |page_title|
@@ -54,6 +57,7 @@ class Course < ActiveRecord::Base
 	end
 
 	def to_param
-		self.short_name
+		return self.short_name if self.period == App.current_period
+		return self.id
 	end
 end

app/models/user.rb

@@ -22,7 +22,7 @@ class User < ActiveRecord::Base
 	acts_as_paranoid
 
 	# Associacoes
-	has_and_belongs_to_many :courses, :order => 'full_name'
+	has_and_belongs_to_many :courses, :order => 'full_name', :conditions => "period = #{App.current_period}"
 
 	# Validacao
 	validates_length_of       :login, :within => 3..40