Treat Calendar and Gantt pages as separate modules. #6153

This will let the Issue Tracking, Gantt, and Calendar modules be enabled
or disabled as needed.  A database migration will enable the Gantt and
Calendar for all existing projects that have Issue Tracking enabled.

Contributed by Adam Soltys

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4013 e93f8b46-1217-0410-a6f0-8f06a7374b81

db/migrate/20100819172912_enable_calendar_and_gantt_modules_where_appropriate.rb

@@ -0,0 +1,12 @@
+class EnableCalendarAndGanttModulesWhereAppropriate < ActiveRecord::Migration
+  def self.up
+    EnabledModule.find(:all, :conditions => ["name = ?", 'issue_tracking']).each do |e|
+      EnabledModule.create(:name => 'calendar', :project_id => e.project_id)
+      EnabledModule.create(:name => 'gantt', :project_id => e.project_id)
+    end
+  end
+
+  def self.down
+    EnabledModule.delete_all("name = 'calendar' OR name = 'gantt'")
+  end
+end