Unnamed

class GatewaysController < ApplicationController    #before_filter :admin_only, :only => [:update]  # GET /gateways  # GET /gateways.xml  def index    @gateways = Gateway.find(:all, :conditions => {:gw_attribute => "via", :reseller_id => @userinterface.device}, :select => "id, gw_username, gw_value")    respond_to do |format|      format.html # index.html.erb      format.xml  { render :xml => @gateways }    end  endend NoMethodError in GatewaysController#indexYou have a nil object when you didn't expect it!The error occurred while evaluating nil.deviceRAILS_ROOT: /Users/miles/Documents/Dev/gatewayApplication Trace | Framework Trace | Full Traceapp/controllers/gateways_controller.rb:7:in `index'