Strip trailing slashes from ScreeningUrl records

app/models/screened_url.rb

@@ -11,13 +11,16 @@ class ScreenedUrl < ActiveRecord::Base
 
   default_action :do_nothing
 
-  before_validation :strip_http
+  before_validation :normalize
 
   validates :url, presence: true, uniqueness: true
   validates :domain, presence: true
 
-  def strip_http
+  def normalize
-    self.url.gsub!(/http(s?):\/\//i, '')
+    if self.url
+      self.url.gsub!(/http(s?):\/\//i, '')
+      self.url.gsub!(/(\/)+$/, '') # trim trailing slashes
+    end
   end
 
   def self.watch(url, domain, opts={})

spec/models/screened_url_spec.rb

@@ -21,6 +21,14 @@ describe ScreenedUrl do
         described_class.create(valid_params.merge(url: url.gsub('http://', prefix))).url.should == url.gsub('http://', '')
       end
     end
+
+    it "strips trailing slash" do
+      described_class.create(valid_params.merge(url: 'silverbullet.in/')).url.should == 'silverbullet.in'
+    end
+
+    it "strips trailing slashes" do
+      described_class.create(valid_params.merge(url: 'silverbullet.in/buy///')).url.should == 'silverbullet.in/buy'
+    end
   end
 
   describe '#watch' do