User groups branch added.

git-svn-id: http://redmine.rubyforge.org/svn/branches/work@1372 e93f8b46-1217-0410-a6f0-8f06a7374b81

groups/db/migrate/040_create_changesets_issues.rb

@@ -0,0 +1,13 @@
+class CreateChangesetsIssues < ActiveRecord::Migration
+  def self.up
+    create_table :changesets_issues, :id => false do |t|
+      t.column :changeset_id, :integer, :null => false
+      t.column :issue_id, :integer, :null => false
+    end
+    add_index :changesets_issues, [:changeset_id, :issue_id], :unique => true, :name => :changesets_issues_ids
+  end
+
+  def self.down
+    drop_table :changesets_issues
+  end
+end