michaelRM

class GroupsController < ApplicationController
  skip_before_filter :login_required , :only => [:index,:show,:join]
  before_filter      :pending?       , :only => [:index,:show]
  before_filter      :suspended?     , :only => [:index,:show]

  before_filter :find_group, :only => [:edit,:update,:show,:destroy,:manage_docs,:join]
  before_filter :require_group_admin, :only => [:edit,:update,:destroy]

  def index
    q      = params[:q]

michaelRM

-if @product.is_a?(product)
  = form_for @purchases, :url => product_purchases_url(@product), :method => :post do |f|

...