Before

in view

<% form_for_tag blabal do |f| %>
  <%= f.text_field_tag :quick, params[:search][:quick] %>
 <%= select_tag("country", options_for_select([["unassigned" , "0" ]] +
                  Country.to_dropdown, region.country_id),
                  {:name => "search[country]"} ) %>
  <%= f.submit "Search" %>
<% end %>

After

in controller

require 'ostruct'

def index
  @search = OpenStruct.new(params[:search])
end

in view

<% form_for :search, :url => {:action => "index"}, :html => {:method => :get} do |f| %>
  <%= f.text_field :quick %>
  <%= f.select :quick, Country.to_dropdown %>
  <%= f.submit "Search" %>
<% end %>