Class: Concepts::HierarchicalController

Inherits:
ConceptsController
  • Object
show all
Defined in:
app/controllers/concepts/hierarchical_controller.rb

Overview

Copyright 2011 innoQ Deutschland GmbH

Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Instance Method Summary collapse

Instance Method Details

#index ⇒ Object 



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# File 'app/controllers/concepts/hierarchical_controller.rb', line 19

def index
  authorize! :read, Iqvoc::Concept.base_class

  scope = if params[:published] == '0'
    Iqvoc::Concept.base_class.editor_selectable
  else
    Iqvoc::Concept.base_class.published
  end

  # if params[:broader] is given, the action is handling the reversed tree
  root_id = params[:root]
  if root_id && root_id =~ /\d+/
    # NB: order matters; see the following `where`
    if params[:broader]
      scope = scope.includes(:narrower_relations, :broader_relations)
    else
      scope = scope.includes(:broader_relations, :narrower_relations)
    end
    @concepts = scope.where(Concept::Relation::Base.arel_table[:target_id].eq(root_id))
  else
    if params[:broader]
      @concepts = scope.broader_tops.includes(:broader_relations)
    else
      @concepts = scope.tops.includes(:narrower_relations)
    end
  end

  # When in single query mode, AR handles ALL includes to be loaded by that
  # one query. We don't want that! So let's do it manually :-)
  ActiveRecord::Associations::Preloader.new(@concepts,
      Iqvoc::Concept.base_class.default_includes + [:pref_labels]).run

  @concepts.sort! do |a, b|
    a.pref_label.to_s <=> b.pref_label.to_s
  end

  respond_to do |format|
    format.html
    format.json do # Treeview data
      @concepts.map! do |c|
        {
          :id   => c.id,
          :url  => concept_path(:id => c, :format => :html),
          :text => CGI.escapeHTML(c.pref_label.to_s),
          :hasChildren => (params[:broader] ? c.broader_relations.any? : c.narrower_relations.any?),
          :additionalText => (" (#{c.additional_info})" if c.additional_info.present?)
        }
      end
      render :json => @concepts.to_json
    end
  end
end