news_item_controller.rb

class NewsItemsController < ApplicationController
  include Dateable

  has_scope :page, default: 1
  has_scope :year

  def index
    @year_range = NewsItem.year_range
    @records = apply_scopes(default_scope)

    respond_to do |format|
      format.html
      format.js { render('shared/load_more') }
    end
  end

  def show
    @news_item = NewsItem.find(params[:id])
  end
  
  private
  
  def default_scope
    params.values_at(:exhibition_id) ? Exhibition.find(params[:exhibition_id]).news_items : NewsItem
  end

end