added #convert_url to add http:// when user forgot to put

app/models/channel_partner.rb

@@ -6,4 +6,12 @@ class ChannelPartner < ActiveRecord::Base
   validates_presence_of :channel_id, :url, :image
 
   scope :ordered, -> { order('id desc') }
+
+  before_save :convert_url
+
+  def convert_url
+    unless self.url.starts_with?('http://', 'https://')
+      self.url = ['http://', self.url] * ''
+    end
+  end
 end

spec/factories.rb

@@ -15,6 +15,12 @@ FactoryGirl.define do
     "foo_page_#{n}"
   end
 
+  factory :channel_partner do |f|
+    f.url "http://google.com"
+    f.image File.open("#{Rails.root}/spec/support/testimg.png")
+    f.association :channel
+  end
+
   factory :user do |f|
     f.name "Foo bar"
     f.password "123456"

spec/models/channel_partner_spec.rb

@@ -10,4 +10,24 @@ describe ChannelPartner do
       it{ should validate_presence_of field }
     end
   end
+
+  describe '#convert_url' do
+    context "with invalid url" do
+      let(:partner) { create(:channel_partner, url: 'www.google.com.br') }
+      before do
+        partner.convert_url
+      end
+
+      it { expect(partner.url).to eq('http://www.google.com.br') }
+    end
+
+    context "with https url" do
+      let(:partner) { create(:channel_partner, url: 'https://www.google.com.br') }
+      before do
+        partner.convert_url
+      end
+
+      it { expect(partner.url).to eq('https://www.google.com.br') }
+    end
+  end
 end