Makes Version#start_date return the minimum start_date of its issues.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4574 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/project.rb

@@ -454,7 +454,7 @@ class Project < ActiveRecord::Base
     [
      issues.minimum('start_date'),
      shared_versions.collect(&:effective_date),
-     shared_versions.collect {|v| v.fixed_issues.minimum('start_date')}
+     shared_versions.collect(&:start_date)
     ].flatten.compact.min
   end
 

app/models/version.rb

@@ -43,7 +43,7 @@ class Version < ActiveRecord::Base
   end
   
   def start_date
-    effective_date
+    @start_date ||= fixed_issues.minimum('start_date')
   end
   
   def due_date
@@ -77,8 +77,7 @@ class Version < ActiveRecord::Base
   def behind_schedule?
     if completed_pourcent == 100
       return false
-    elsif due_date && fixed_issues.present? && fixed_issues.minimum('start_date') # TODO: should use #start_date but that method is wrong...
-      start_date = fixed_issues.minimum('start_date')
+    elsif due_date && start_date
       done_date = start_date + ((due_date - start_date+1)* completed_pourcent/100).floor
       return done_date <= Date.today
     else