如何修复Rails 3中的Request-URI Too Large错误？

trap.rb

class Trap < ActiveRecord::Base

 def self.search(empcode, date_entry)
  if empcode and date_entry
   where(\'empcode LIKE ? and date_entry = ?\', \"%#{empcode}%\", \"#{date_entry}\")
  else
   scoped
  end
 end
end

traps_controller.rb

class TrapsController < ApplicationController

 def index
  @traps = Trap.search(params[:search_empcode], params[:search_date_entry])

  respond_to do |format|
   format.html # index.html.erb
   format.xml  { render :xml => @traps }
  end
 end

 .
 .
 .
end

index.html.erb

<h2>TRAP 1.0</h2>

<%= form_tag traps_path, :method => \'get\' do  %>
 <p>
  Employee Code: <%= text_field_tag :search_empcode, params[:search_empcode] %>
  Date Entry: <%= date_select :search_date_entry, params[:search_date_entry] %>
 </p>

 <p class=\"buttons\"> <%= submit_tag \"Search\", :name => nil %></p>
<% end %>

<table>
 <tr>
  <th>Empcode</th>
  <th>Date entry</th>
  <th></th>
  <th></th>
  <th></th>
 </tr>

 <% @traps.each do |trap| %>
 <tr>
  <td><%= trap.empcode %></td>
  <td><%= trap.date_entry %></td>
  <td><%= link_to \'Show\', trap %></td>
  <td><%= link_to \'Edit\', edit_trap_path(trap) %></td>
  <td><%= link_to \'Destroy\', trap, :confirm => \'Are you sure?\', :method => :delete %></td>
 </tr>
 <% end %>
</table>

<br />

<%= link_to \'New Trap\', new_trap_path %>