publication/app/controllers/admin/publications_controller.rb

class Admin::PublicationsController < OrbitAdminController
    before_action :categories, only: [:index, :new, :edit]

  def index
    @table_fields = [:title, :status, :author, :pub_date, :category]
    @filter_fields = filter_fields(@categories, @tags)
    @publications = Publication.order_by(sort)
                    .with_categories(filters("category"))
                    .with_status(filters("status"))
    @publications = search_data(@publications, [:title]).page(params[:page]).per(10)

    render partial: "index" if request.xhr?
  end

  def new
    @publication = Publication.new
  end

  def create
    publication = Publication.create(publication_params)
    redirect_to admin_publications_path
  end

  def edit
    @publication = Publication.find(params[:id])
  end

  def update
    publication = Publication.find(params[:id])
    publication.update_attributes(publication_params)
    redirect_to admin_publications_path
  end

  def show
    @publication = Publication.find(params[:id])
    @chapters = @publication.chapters.order_by(sort).page(params[:page]).per(10)
    @table_fields = [:title, :author, :page, :sort_number]
  end

  def destroy
    publication = Publication.find(params[:id])
    publication.destroy
    redirect_to admin_publications_path
  end

  def save_chapter_order
    ids = params[:ids]
    ids.each_with_index do |id,index|
      chapter = Chapter.find(id) rescue nil
      if !chapter.nil?
        chapter.sort_number = index
        chapter.save
      end
    end
    render json: {success: true}.to_json
  end

  private

  def publication_params
    params.require(:publication).permit!
  end

  def categories
    @categories = @module_app.categories
    @tags = @module_app.tags
  end
end