Ohm no longer has validations

app/models/link.rb

@@ -9,10 +9,6 @@ class Link < Ohm::Model
   index :url
   index :hash
 
-  def validate
-    assert_present :url
-  end
-
   protected
 
   def after_create

spec/app/application_spec.rb

@@ -2,7 +2,7 @@
 
 describe Shawtie::Application do
   context 'GET /:hash' do
-    let!(:link) { FactoryGirl.create(:link) }
+    let!(:link) { FactoryGirl.build(:link) }
 
     before do
       get "/#{link.hash}"

spec/factories.rb

@@ -4,6 +4,6 @@
       url 'http://example.com'
     end
 
-    initialize_with { Link.new(url: url) }
+    initialize_with { Link.create(url: url) }
   end
 end

spec/models/link_spec.rb

@@ -1,22 +1,14 @@
 require 'spec_helper'
 
 describe Link do
-  context 'validations' do
-    it 'requires url to be present' do
-      link = Link.new(url: nil)
-      link.validate
-      link.errors[:url].should include :not_present
-    end
-  end
-
   context 'callbacks' do
     it 'sets hash after create' do
-      link = FactoryGirl.create(:link)
+      link = FactoryGirl.build(:link)
       link.hash.should == 'b'
     end
 
     it 'persists hash after create' do
-      link = FactoryGirl.create(:link)
+      link = FactoryGirl.build(:link)
       Link.find(hash: link.hash).should_not be_empty
     end
   end