undefined method 'act_as_tree'

rubyonrails-talk
1

I have 2 models: topic model and post:

class Topic < ActiveRecord::Base   has_many :posts end

class Post < ActiveRecord::Base   acts_as_tree :order=>"body"   belongs_to :topic end

and I have a view for creating new topic (and new post):

<h1>Add a new Topic</h1>

<% form_for :topic, @topic, :url => { :action => "create" } do |f| %>   Title: <%= f.text_field :title %>

  <% fields_for :posts do |post| %>     Body:<%= post.text_field :body %><br/>   <% end %>

  <%= submit_tag 'Post Topic', :class => "submit" %> <% end %>

I get the undefined method 'act_as_tree' error in the TopicsController: (in the create method) @post = Post.new(params[:post])

any ideas?

2

What version of rails are you running? In 2.0 acts_as_tree (along with a bunch of stuff) has been moved into separate plugins.

Fred

3

edge.. I guess I need to google for this plug-in.

thanks!