Adds a branch for unlimited project hierarchy.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/work@2148 e93f8b46-1217-0410-a6f0-8f06a7374b81

nested_projects/db/migrate/076_allow_null_position.rb

@@ -0,0 +1,14 @@
+class AllowNullPosition < ActiveRecord::Migration
+  def self.up
+    # removes the 'not null' constraint on position fields
+    change_column :issue_statuses, :position, :integer, :default => 1, :null => true
+    change_column :roles, :position, :integer, :default => 1, :null => true
+    change_column :trackers, :position, :integer, :default => 1, :null => true
+    change_column :boards, :position, :integer, :default => 1, :null => true
+    change_column :enumerations, :position, :integer, :default => 1, :null => true
+  end
+
+  def self.down
+    # nothing to do
+  end
+end