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/042_create_issue_relations.rb

@@ -0,0 +1,14 @@
+class CreateIssueRelations < ActiveRecord::Migration
+  def self.up
+    create_table :issue_relations do |t|
+      t.column :issue_from_id, :integer, :null => false
+      t.column :issue_to_id, :integer, :null => false
+      t.column :relation_type, :string, :default => "", :null => false
+      t.column :delay, :integer
+    end
+  end
+
+  def self.down
+    drop_table :issue_relations
+  end
+end