Ruby on Rails

 am running ruby 1.9.2 and rails 3.2. I have active record call that is returning nil even though the data is there. So my question is, what part am I missing to return the records?

my model is:stores.rb

class Stores < ActiveRecord::Base    establish_connection "as400_#{RAILS_ENV}"  set_table_name "SIGNCUSTM2"         def self.find_stores(params)  Customer.where("CAD505=? AND TRYT20=?", params[:parmstate],    params[:parmrep]).where.not(cusn05: nil)  end        def index          @customers = Customer.find_stores(params[:model])      end    end 

my view: store.html

            <% @customers |customer| %>                <p align="center">                    <strong>Store:</strong>&nbsp;<%= select_tag :customers %>              </p>