How to use searchlogic and geokit together

example.rb

@zipcode = Zipcode.find_by_name("85023")

# Passing in a hash of search parameters is more convenient for my purposes,
# but searchlogic allows the second, chained method of searching also works.
@locations = Location.by_location(:origin => @zipcode, :within => 10).search(:name_like => "searchlogic", :city_is => "Phoenix")
@locations = Location.by_location(:origin => @zipcode, :within => 10).name_like("searchlogic").city_is("Phoenix")

locations.rb

# create_table "locations", :force => true do |t|
#   t.string   "name"
#   t.decimal  "lat", :precision => 15, :scale => 10
#   t.decimal  "lng", :precision => 15, :scale => 10
#   t.string   "address1"
#   t.string   "address2"
#   t.string   "city"
#   t.string   "state"
#   t.string   "zip"
#   t.datetime "created_at"
#   t.datetime "updated_at"
# end
class Location < ActiveRecord::Base
  
  acts_as_mappable
  
  # For more info see: 
  # http://www.napcsweb.com/blog/2009/08/11/geokit-and-named_scope/
  named_scope :map_conditions, lambda { |*args| {:conditions => args} }
  def self.by_location(options ={})
    scope = self.scoped({})
    scope = scope.map_conditions "#{distance_sql(options[:origin])} <= #{options[:within]}"
    scope
  end
end

zipcode.rb

# create_table "zipcodes", :force => true do |t|
#   t.string   "name"
#   t.decimal  "lat", :precision => 15, :scale => 10
#   t.decimal  "lng", :precision => 15, :scale => 10
#   t.datetime "created_at"
#   t.datetime "updated_at"
# end
class Zipcode < ActiveRecord::Base
  
  acts_as_mappable
  
end