content_for :body_content_side does not show up...

events_controller.rb

class EventsController < ApplicationController

  before_filter :find_all_events
  before_filter :find_page

  def index
    # you can use meta fields from your model instead (e.g. browser_title)
    # by swapping @page for @event in the line below:
    present(@page)
  end

  def show
    @event = Event.find(params[:id])

    # you can use meta fields from your model instead (e.g. browser_title)
    # by swapping @page for @event in the line below:
    present(@page)
  end

protected

  def find_all_events
    @events = Event.order('position ASC')
  end

  def find_page
    @page = Page.where(:link_url => "/events").first
  end

end

show.html.haml

- content_for :body_content_title do
  = @event.title
- content_for :body_content_left do
  %article.event
    %header
      %h3= link_to @event.title, event_url(@event)
    .event_box
      .date_and_city
        .date= l(@event.start_date, :format => :dmonthy).downcase + " - " + l(@event.end_date, :format => :dmonthy).downcase
        .city= @event.location
      .location= @event.city unless @event.city.blank?
    
    .details= raw(@event.description)