Module: TreeListHelper

Defined in:
app/helpers/tree_list_helper.rb

Instance Method Summary collapse

Instance Method Details

#nested_tree_nodes(form, expanded, nested_collection = form.collection) ⇒ Object

Creates tree structure for collection

  • form - form renderer used for rendering resource actions

  • expanded - array of expanded nodes ids (integer)

  • nested_collection - collection of resources in actual tree level

Returns array of hashes with nodes info for Fancytree :key - string, mandatory, node id :title - string, mandatory, displayed title of node :folder - boolean, true if node has childrens/is expandable :lazy - boolean, AJAX is used for children loading :children - array of node children (used if node is expanded)



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# File 'app/helpers/tree_list_helper.rb', line 14

def nested_tree_nodes(form, expanded, nested_collection = form.collection)
  nodes = []

  nested_collection.each_with_index do |res, i| 
    form.with_resource(res, res, i) do
      form.render_row do

        node = {
          # TODO: remove to_s for new fancytree build (issue 90)
          key: form.resource.id.to_s,
          title: form.resource.to_label
        }

        # create folder if node has children
        if form.resource.has_children?
          node[:folder] = true
          node[:lazy] = true

          # expand and load subtree if expanded before
          if expanded.include?(form.resource.id)
            node[:children] = nested_tree_nodes(form, expanded, 
                form.resource.children)
            node[:lazy] = false
          end
        end

        node[:title] += content_tag :div, class: 'btn-group btn-mini' do
          form.render_actions
        end

        nodes << node

      end # row
    end # end form
  end # end collection

  nodes
end