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Introduction

This is a helper plugin to generate ajax based tree structure (two level). It can be used for two models having n:m or 1:n relationships. A leaf from any branch can be dragged and dropped in another branch. A scaffolding arrangement is also done to create a new branch, add leaf etc.

For example:

class Category < ActiveRecord::Base has_many :articles validates_presence_of :name end class Article < ActiveRecord::Base belongs_to :categories validates_presence_of :name end

Installation:

ruby script/plugin install http://ajax-tree.googlecode.com/svn/trunk/ajax_tree/

Here we take the previous example of Category and Article models. Generate the ajax controller for the two models.

Usage

ruby script/generate controller model1 model2

Example

ruby script/generate home category article

Copy static files

Copy add.png, delete.png from /vendor/plugins/ajax_tree/ directory to /public/images directory.

Copy ajax_tree.css file from /vendor/plugins/ajax_tree/ directory to /public/stylesheets/ directory.
Include css in your application layout

< %= stylesheet_link_tag 'ajax_tree' %>

Call the helpers

Specify model names for branch model and leaf model in /views/home/_show_ajax_tree.rhtml partial.

< %= ajax_tree(@branches,{:branch => 'category',:leaf => 'article'})%>

Then, call this partial in any rhtml, where you want to display the ajax tree. In this case, we have done it in /views/home/index.rhtml

home_controller.rb (Generated automatically)

class HomeController < ApplicationController def index @branches = Category.find(:all) end : : : end

index.rhtml

<%= render :partial => 'show_ajax_tree' %>

Contributions:

This project is hosted at http://code.google.com/p/ajax-tree/. Please leave your feedback.

:credits => { :developers => [Ripan Kumar, Sylvain Bonfils, Vincent Spehner, Anup Narkhede], : at => "www.thinkdry.com" }