redmine/wiki/db/migrate/012_add_comments_permissions.rb

class AddCommentsPermissions < ActiveRecord::Migration
  def self.up
    Permission.create :controller => "news", :action => "add_comment", :description => "label_comment_add", :sort => 1130, :is_public => false, :mail_option => 0, :mail_enabled => 0
    Permission.create :controller => "news", :action => "destroy_comment", :description => "label_comment_delete", :sort => 1133, :is_public => false, :mail_option => 0, :mail_enabled => 0
  end

  def self.down
    Permission.find(:first, :conditions => ["controller=? and action=?", 'news', 'add_comment']).destroy
    Permission.find(:first, :conditions => ["controller=? and action=?", 'news', 'destroy_comment']).destroy
  end
end