Add actual redirection

app/controllers/short_urls_controller.rb

@@ -12,4 +12,9 @@ def create
 
     redirect_to new_short_url_path
   end
+
+  def show
+    short_url = ShortUrl.find_by_name(params[:name])
+    redirect_to short_url.url
+  end
 end

app/models/short_url.rb

@@ -17,6 +17,13 @@ def save
     end
   end
 
+  def self.find_by_name(name)
+    stored_url = redis.get(name)
+    if stored_url
+      ShortUrl.new(name: name, url: stored_url)
+    end
+  end
+
   def full_url
     "http://#{HOSTNAME}/#{name}"
   end
@@ -48,4 +55,8 @@ def generate_random_name
   def redis
     @redis ||= Redis.new(:driver => :hiredis)
   end
+
+  def self.redis
+    @redis ||= Redis.new(:driver => :hiredis)
+  end
 end

config/routes.rb

@@ -1,4 +1,6 @@
 Shortstuff::Application.routes.draw do
   resources :short_urls, only: [:new, :create]
   root to: "short_urls#new"
+
+  match '/:name' => 'short_urls#show'
 end

spec/features/visit_short_url_spec.rb

@@ -0,0 +1,12 @@
+require 'spec_helper'
+
+feature 'redirecting users to short links', js: true do
+  scenario 'A valid link is visited' do
+    short_url = ShortUrl.new(url: "http://www.google.com", name: "tester")
+    short_url.save
+
+    visit "/tester"
+
+    page.should have_content 'Google'
+  end
+end

spec/models/short_url_spec.rb

@@ -53,4 +53,24 @@
       expect(shorturl.full_url).to eq('http://example.com/mypage')
     end
   end
+
+  describe ".find_by_name" do
+    context "when there is an instance with the name" do
+      it "returns the instance" do
+        short_url = ShortUrl.new(name: 'test', url: 'http://www.bing.com').save
+
+        searched_short_url = ShortUrl.find_by_name('test')
+
+        expect(searched_short_url.name).to eq('test')
+      end
+    end
+
+    context 'when there is not an instance with the name' do
+      it "returns nil" do
+        searched_short_url = ShortUrl.find_by_name('test')
+
+        expect(searched_short_url).to be_nil
+      end
+    end
+  end
 end