acts_as_tree error

rubyonrails-talk
1

I am getting the following error when I attempt to use acts_as_tree. I am new to this relationship and am stuck.

undefined method `acts_as_tree'

Model class Rental < ActiveRecord::Base   acts_as_tree :order => "sort_order"

  validates_presence_of :name   validates_numericality_of :sort_order end

Schema create_table "rentals", :force => true do |t|     t.string "name"     t.integer "sort_order"     t.integer "parent_id"     t.datetime "created_at"     t.datetime "updated_at"   end

What am I missing?

2

did you install the acts_as_tree plugin ?

3

You have installed the acts_as_tree plugin, right?

   script/plugin install acts_as_tree

(it's on git://github.com/rails/acts_as_tree.git)

-Rob

4

script/plugin install acts_as_tree (git://github.com/rails/acts_as_tree.git)

I didn't realize it was a plugin. The articles and book I was following led me to believe it was a native relationship.

Thanks!