Trek::Orderable

Position tracking with acts_as_list, scoped by parent.

What it adds

• acts_as_list scope: :parent, top_of_list: 0
• An ordered scope (position order), which adds nothing on a closure_tree model such as Page or MenuNode: closure_tree already orders its records by position
• All the acts_as_list instance methods: insert_at, move_to_top, move_to_bottom, move_higher, move_lower…

Requirements

• A position integer column (and a parent_id column for the scope)

Usage

class MenuNode < ApplicationRecord
  include Trek::Orderable
end

menu.children # ordered by position, through closure_tree
node.move_to_top

This is what powers drag & drop reordering (SortableJS) in the admin lists.