dav1a1223/active_admin-sortable_tree

Show ActiveAdmin index as a nested tree with drag'n'drop

ActiveAdmin::SortableTree

This gem adds a tree and a list view to your ActiveAdmin resource index, both sortable via drag'n'drop.

Installation

# Gemfile
gem "active_admin-sortable_tree"

Usage (Tree)

Admin:

# app/admin/page.rb
ActiveAdmin.register Page do
  sortable tree: true

  index :as => :sortable do
    label :title # item content
        actions
  end
end

Model: ActiveAdmin::SortableTree is agnostic to the tree implementation. All you have to do is expose a sorting attribute and a few tree methods (:parent, :children and :roots). Let's say you use Ancestry:

class Page < ActiveRecord::Base
  attr_accessible :title, :body, :position
  has_ancestry :orphan_strategy => :rootify
end

You can configure these methods if you need:

ActiveAdmin.register Page do
  sortable tree: true,
           sorting_attribute: :position,
           parent_method: :parent,
           children_method: :children,
           roots_method: :roots,
           roots_collection: proc { current_user.pages.roots }
  # …
end

The option roots_collection provides full control on how to find the root nodes of your sortable tree and is evaluated within the context of the controller. Please note that roots_collection will override what is specified in roots_method.

Usage (List)

Admin:

# app/admin/page.rb
ActiveAdmin.register Page do
  sortable

  index :as => :sortable do
    label :title # item content
    actions
  end
end

Model: Sortable list assumes you have a :position field in your resource. Of course it's configurable:

ActiveAdmin.register Page do
  sortable tree: false, # default
           sorting_attribute: :my_position_field
  # …
end

Note: If you are using the acts_as_list gem to manage a :position field (not required, but allows for other nice programmatic manipulation of ordered model lists), you must ensure a zero-based index for your list using the top_of_list option:

class Page < ActiveRecord::Base
  # Make this list act like a zero-indexed array to avoid off-by-one errors in your sorting
  acts_as_list top_of_list: 0
end

Usage (generic ActiveAdmin index)

Currently supports only IndexAsBlock, more to come!

Admin:

# app/admin/page.rb
ActiveAdmin.register Page do
  sortable

  index :as => :block do |page|
    # item content
  end
end

Model: Same as list view (see above)

Customization

Full options list with defaults

ActiveAdmin.register Page do
  sortable tree: true,
           max_levels: 0,               # infinite indent levels
           protect_root: false,         # allow root items to be dragged
           sorting_attribute: :position,
           parent_method: :parent,
           children_method: :children,
           roots_method: :roots,
           roots_collection: nil,       # proc to specifiy retrieval of roots
           sortable: true,              # Disable sorting (use only 'tree' functionality)
           collapsible: false,          # show +/- buttons to collapse children
           start_collapsed: false,      # when collapsible, start with all roots collapsed
end

Actions

In IndexAsSortable you can add custom actions (with or without the defaults):

index :as => :sortable do
  actions defaults: false do |page|
    link_to "Custom action", my_custon_path(page)
  end
end

Ajax Callback Config

It exposes three Ajax Events: ajaxDone, ajaxFail and ajaxAlways, which correspond to jQuery ajax callbacks: done, fail and always.

To subscribe Ajax callback:

ActiveAdminSortableEvent.add('ajaxDone', function (){
  // do what you want
})

Semantic Versioning

ActiveAdmin::SortableTree follows semantic versioning.

Alternatives

• Active Admin Sortable

Copyright

Copyright © 2013 Francesco Disperati, Cantiere Creativo. See the file MIT-LICENSE for details. See the full list list of contributors.