cache responses

app/controllers/postcode_to_wards_controller.rb

@@ -0,0 +1,2 @@
+class PostcodeToWardsController < ApplicationController
+end

app/helpers/postcode_to_wards_helper.rb

@@ -0,0 +1,2 @@
+module PostcodeToWardsHelper
+end

app/models/postcode_to_ward.rb

@@ -0,0 +1,3 @@
+class PostcodeToWard < ActiveRecord::Base
+  belongs_to :ward
+end

app/models/ward.rb

@@ -2,7 +2,7 @@
 require 'open-uri'
 
 class Ward < ActiveRecord::Base
-  acts_as_solr :fields=>["name"]
+  #acts_as_solr :fields=>["name"]
   belongs_to :constituency
 
   has_permalink :name
@@ -18,7 +18,13 @@ def openly_local_ward
   end
 
   def self.get_by_postcode postcode
-
+    postcode = postcode.downcase
+    # cache the previous results of the lookup
+    previous_result = PostcodeToWard.find_by_postcode(postcode)
+    debugger
+    unless previous_result.blank?
+      return previous_result.ward
+    else
       lookup_url = "http://www.neighbourhood.statistics.gov.uk/dissemination/LeadAreaSearch.do?a=7&c=#{CGI::escape postcode }&d=14&r=0&i=1001&m=0&enc=1&areaSearchText=#{CGI::escape postcode}&areaSearchType=14&extendedList=false&searchAreas="
 
       result = ''
@@ -42,10 +48,18 @@ def self.get_by_postcode postcode
       end
 
       unless result.blank?
-        return Ward.find_by_permalink(result.parameterize)
+        #write the results to the lookup cache
+
+        the_ward = Ward.find_by_permalink(result.parameterize)
+
+        p = PostcodeToWard.new(:postcode=>postcode, :ward=>the_ward)
+        p.save
+
+        return the_ward
       else
         return nil
       end
+    end
   end
 end
 

config/routes.rb

@@ -1,4 +1,6 @@
 ActionController::Routing::Routes.draw do |map|
+  map.resources :postcode_to_wards
+
   map.resources :restyles, :collection=>{:revert => :put}, :member => {:apply => :put}
 
   map.resources :jobs

db/migrate/20091006160550_create_postcode_to_wards.rb

@@ -0,0 +1,13 @@
+class CreatePostcodeToWards < ActiveRecord::Migration
+  def self.up
+    create_table :postcode_to_wards do |t|
+      t.string :postcode
+      t.integer :ward_id
+      t.timestamps
+    end
+  end
+
+  def self.down
+    drop_table :postcode_to_wards
+  end
+end

db/schema.rb

@@ -9,7 +9,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20091003185125) do
+ActiveRecord::Schema.define(:version => 20091006160550) do
 
   create_table "brain_busters", :force => true do |t|
     t.string "question"
@@ -159,6 +159,13 @@
     t.integer  "ward_id"
   end
 
+  create_table "postcode_to_wards", :force => true do |t|
+    t.string   "postcode"
+    t.integer  "ward_id"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+  end
+
   create_table "restyles", :force => true do |t|
     t.string   "title"
     t.string   "description"

test/fixtures/postcode_to_wards.yml

@@ -0,0 +1,7 @@
+# Read about fixtures at http://ar.rubyonrails.org/classes/Fixtures.html
+
+# one:
+#   column: value
+#
+# two:
+#   column: value

test/functional/postcode_to_wards_controller_test.rb

@@ -0,0 +1,8 @@
+require 'test_helper'
+
+class PostcodeToWardsControllerTest < ActionController::TestCase
+  # Replace this with your real tests.
+  test "the truth" do
+    assert true
+  end
+end

test/unit/helpers/postcode_to_wards_helper_test.rb

@@ -0,0 +1,4 @@
+require 'test_helper'
+
+class PostcodeToWardsHelperTest < ActionView::TestCase
+end

test/unit/postcode_to_ward_test.rb

@@ -0,0 +1,8 @@
+require 'test_helper'
+
+class PostcodeToWardTest < ActiveSupport::TestCase
+  # Replace this with your real tests.
+  test "the truth" do
+    assert true
+  end
+end