GUI for sortable tree to manage data organized in tree with ancestry gem.

Works with Rails 5, Rails 4.

The gem uses:

• jquery-sortable plugin - jQuery Sortable UI
• nestedSortable - a jQuery plugin for nested lists which extends jQuery Sortable UI

See demo app in the repository (spec/dummy). Run page with the tree: http://localhost:3000/categories/manage.

gem 'haml-rails'

gem 'jquery-rails'
gem "jquery-ui-rails"

gem 'ancestry'
gem 'sortable_tree_rails'

• the gem uses HAML

# config/routes.rb

resources :categories do
  collection do
     post :sort
  end
end

This page (sort_categories_path) will be used by the gem to update data after drag&drop.

It assumes that your model has already fields in DB for ancestry.

# app/models/category.rb

class Category < ActiveRecord::Base

  has_ancestry

  # it uses column ancestry_depth
  # has_ancestry :cache_depth=>true

end

Include js files in your assets file application.js:

//= require jquery2
//= require jquery-ui

//=require jquery.mjs.nestedSortable.js
//=require sortable_tree.js

it depends on jquery and jquery-ui which come from gems 'jquery-rails', 'jquery-ui-rails'. Change application.js to include jquery and jquery-ui (jquery-ui/sortable) if you are not using these gems.

Add CSS file to your styles.

for SCSS (app/assets/application.scss):

... your css here ..

@import "sortable_tree";

class CategoriesController < ApplicationController
  include SortableTreeController::Sort
  sortable_tree 'Category', {parent_method: 'parent'}

  def manage
    # get items to show in tree
    @items = Category.all.arrange(:order => :pos)

  end

end

# app/views/categories/manage.html.haml

= render_sortable_tree(@items, {name_method: :name, sort_url: sort_categories_url, max_levels: 5, controls_partial: 'controls'})

# app/views/categories/_controls.html.haml

= link_to 'Edit', edit_category_url(item)
= link_to 'Delete', category_url(item), :method => :delete, :data => { :confirm => 'Are you sure?' }

in controller:

  include SortableTreeController::Sort
  sortable_tree 'ClassName', {_options_here_}

• ClassName - class name (camel case). For example, 'Category'.
• :sorting_attribute - attribute used for sorting. Set to nil to disable sorting.
• :parent_method - method used to access parent for the item. Set to nil to disable tree (not updating parent).

Examples.

• Example. For model with ancestry. If you use ancestry in model - set :parent_method to 'parent'.

  include SortableTreeController::Sort
  sortable_tree 'ClassName', {parent_method: 'parent', sorting_attribute: 'pos'}

• Example. Do only sorting, without tree.

  include SortableTreeController::Sort
  sortable_tree 'ClassName', {sorting_attribute: 'pos', parent_method: nil}

• Example. No sorting, update only parent.

  include SortableTreeController::Sort
  sortable_tree 'ClassName', {sorting_attribute: nil, parent_method: 'parent'}

= render_sortable_tree(@items, {__options_here})

• :name_method - defined which model method (usually, a column name) will be used to show name (default: :name)

• :sort_url - URL used to update data after item is moved to a new position

• :max_levels - max levels to show in tree (default: 5)

• :controls_partial - specify what partial view to use to show control links for each item in a tree. Set to nil to not show controls.

• example.

= render_sortable_tree(@items, {name_method: :name, sort_url: sort_categories_url, max_levels: 5})

• example of partial view with controls.

• main view:

= render_sortable_tree(@items, {name_method: :name, sort_url: sort_categories_url, max_levels: 5, controls_partial: 'controls'})

• partial with controls. Use local variable item in the partial view.

_controls.html.haml:

= link_to 'Edit', edit_category_url(item)
= link_to 'Delete', category_url(item), :method => :delete, :data => { :confirm => 'Are you sure?' }

• edit file 'views/sortable/_sortable.html.haml' to access the whole layout

read Wiki

GUI for sortable tree with awesome_nested_set gem:

• https://github.com/the-teacher/the_sortable_tree
• https://github.com/winescout/the_sortable_tree

• Some pieces of code was created by inspiration of gem ActiveAdmin Sortable Tree