return false from filter

gistfile1.rb

class ProfilesController < ApplicationController  
	
  before_filter :set_current_account

  def index
    @hours    = BusinessHour.find_hours_for_id(@business.id)
    @services = Service.find_services_for_business(@business.id)
    @staffs   = Staff.find_staff_for_business(@business.id)
    
    respond_to do |format|
        format.js
        format.html
    end
  end

end

class ApplicationController < ActionController::Base

  ...

  def set_current_account
    Rails.logger.debug { "set_current_account" }
    @business = Business.where( "lower(business_name) = ?", current_subdomain.downcase ).first
    Rails.logger.debug { "@business: " + @business.nil?.to_s }
    render_404 if @business.nil?
  end

  ...
end

class ProfilesController < ApplicationController

before_filter :set_current_account

def index
@Hours = BusinessHour.find_hours_for_id(@business.id)
@services = Service.find_services_for_business(@business.id)
@staffs = Staff.find_staff_for_business(@business.id)

respond_to do |format|
    format.js
    format.html
end

end

end

class ApplicationController < ActionController::Base

...

def set_current_account
Rails.logger.debug { "set_current_account" }
@business = Business.where( "lower(business_name) = ?", current_subdomain.downcase ).first
Rails.logger.debug { "@business: " + @business.nil?.to_s }
render_404 && return false if @business.nil?
end

...
end