cache code

app_controller

 User
    def current_user
      @current_user ||= Rails.cache.fetch("customerhub:current:user:#{session[:user_id]}:v#{HUB_VERSION}",
        :expires_in => 20.minutes) {
          User.find(session[:user_id])
      }
    end

    # Will either fetch the current account or return nil if none is found
    Account
    def current_account
      @current_account ||= Rails.cache.fetch("customerhub:current:account:#{current_subdomain}:v#{HUB_VERSION}"){
        Account.find_by_subdomain(current_subdomain)
      }
    end

    Style
    def current_style
      @current_style ||= Rails.cache.fetch("customerhub:current:style:#{current_subdomain}:v#{HUB_VERSION}") {
        Style.find_by_account_id(current_account.id, :select => "id, account_id, header, header_background, page, page_hover, h1, top_link_hover, table_header, company_logo_file_name, company_logo_content_type, company_logo_file_size, page_styles, sub_link")
      }
    end