Versions can now be created with no date.

Versions with no date appear at the end of the roadmap, sorted by name.

git-svn-id: http://redmine.rubyforge.org/svn/trunk@536 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/version.rb

@@ -23,7 +23,7 @@ class Version < ActiveRecord::Base
 
   validates_presence_of :name
   validates_uniqueness_of :name, :scope => [:project_id]
-  validates_format_of :effective_date, :with => /^\d{4}-\d{2}-\d{2}$/, :message => :activerecord_error_not_a_date
+  validates_format_of :effective_date, :with => /^\d{4}-\d{2}-\d{2}$/, :message => :activerecord_error_not_a_date, :allow_nil => true
   
   def start_date
     effective_date
@@ -37,6 +37,16 @@ class Version < ActiveRecord::Base
     effective_date && effective_date <= Date.today
   end
   
+  # Versions are sorted by effective_date 
+  # Those with no effective_date are at the end, sorted by name
+  def <=>(version)
+    if self.effective_date
+      version.effective_date ? (self.effective_date <=> version.effective_date) : -1
+    else
+      version.effective_date ? 1 : (self.name <=> version.name)
+    end
+  end
+  
 private
   def check_integrity
     raise "Can't delete version" if self.fixed_issues.find(:first)