From diego.algorta at gmail.com  Wed Aug  1 11:47:12 2007
From: diego.algorta at gmail.com (Diego Algorta Casamayou)
Date: Wed, 1 Aug 2007 12:47:12 -0300
Subject: [roar-users] view and fields for acts_as_tree or acts_as_nested_set
Message-ID: <78d5ab170708010847q33c7cd70r6e1cd1f7565fcb9b@mail.gmail.com>

Hi Wayne and others...

I'm using BetterNestedSet [1] and have this model:

[1] http://agilewebdevelopment.com/plugins/betternestedset

class ProductCategory < ActiveRecord::Base
  acts_as_nested_set
  validates_presence_of :name
  validates_uniqueness_of :name, :scope => :parent_id
  after_save :update_proxy_parent

  def proxy_parent_id=(new_parent_id)
    @proxy_parent_id = new_parent_id
  end

  def proxy_parent_id
    @proxy_parent_id ||= self.parent_id
  end

  def proxy_parent_changed?
    proxy_parent_id != self.parent_id
  end

  protected

  def update_proxy_parent
    self.move_to_child_of(proxy_parent_id) if proxy_parent_changed? &&
!proxy_parent_id.blank?
  end
end

As you can see I had to add the "proxy_parent_id" attribute so I can
change parents using roar.

Heres the basic Controller with roar definition:

class ProductCategoriesController < ApplicationController
  roar :prefix => 'admin' do
    collection :order => 'lft' do
      edit :name
      column :description
      delete
    end

    form do
      text_field :name
      select_field :proxy_parent_id, :choices =>
ProductCategory.to_select, :name => 'Parent category', :include_blank
=> true
      text_area :description
    end
  end
end

Problem is, I want a better way to represent the tree structure. Best
thing would be to have full drag&drop functionality (like the :view =>
'list') to manage ordering and reparenting of "Product Categories" (or
any other tree/nested_set). But any suggestion on a good way to do
this (even if it's very simpe and nothing to do with AJAX), would be
appreciated.

I've been trying customizing the 'list' view, but no REAL success.

Anyone has implemented something like this?

Thank you.
Diego