This module provides some helpers for the model classes using acts_as_nested_set. It is included by default in all views.
Returns options for select. You can exclude some items from the tree. You can pass a block receiving an item and returning the string displayed in the select.
* +class_or_item+ - Class name or top level times * +mover+ - The item that is being move, used to exlude impossible moves * +&block+ - a block that will be used to display: { |item| ... item.name }
<%= f.select :parent_id, nested_set_options(Category, @category) {|i| "#{'–' * i.level} #{i.name}" }) %>
# File lib/awesome_nested_set/helper.rb, line 23 def nested_set_options(class_or_item, mover = nil) if class_or_item.is_a? Array items = class_or_item.reject { |e| !e.root? } else class_or_item = class_or_item.roots if class_or_item.respond_to?(:scoped) items = Array(class_or_item) end result = [] items.each do |root| result += root.class.associate_parents(root.self_and_descendants).map do |i| if mover.nil? || mover.new_record? || mover.move_possible?(i) [yield(i), i.id] end end.compact end result end
Returns options for select as nested_set_options, sorted by an specific column It requires passing a string with the name of the column to sort the set with You can exclude some items from the tree. You can pass a block receiving an item and returning the string displayed in the select.
* +class_or_item+ - Class name or top level times * +:column+ - Column to sort the set (this will sort each children for all root elements) * +mover+ - The item that is being move, used to exlude impossible moves * +&block+ - a block that will be used to display: { |item| ... item.name }
<%= f.select :parent_id, nested_set_options(Category, :sort_by_this_column, @category) {|i| "#{'–' * i.level} #{i.name}" }) %>
# File lib/awesome_nested_set/helper.rb, line 58 def sorted_nested_set_options(class_or_item, order, mover = nil) if class_or_item.is_a? Array items = class_or_item.reject { |e| !e.root? } else class_or_item = class_or_item.roots if class_or_item.is_a?(Class) items = Array(class_or_item) end result = [] children = [] items.each do |root| root.class.associate_parents(root.self_and_descendants).map do |i| if mover.nil? || mover.new_record? || mover.move_possible?(i) if !i.leaf? children.sort_by! &order children.each { |c| result << [yield(c), c.id] } children = [] result << [yield(i), i.id] else children << i end end end.compact end children.sort_by! &order children.each { |c| result << [yield(c), c.id] } result end
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