Updating all tests. All tests are passing

app/models/spree/digital_link.rb

@@ -3,7 +3,10 @@ module Spree
     
     belongs_to :digital
     belongs_to :line_item
-  
+    
+    validates_length_of :secret, :is => 30
+    validates :digital, :presence => true
+    
     before_validation :set_defaults, :on => :create
     
     # Can this link stil be used? It is valid if it's less than 24 hours old and was not accessed more than 3 times

app/models/spree/line_item_decorator.rb

@@ -1,6 +1,6 @@
 Spree::LineItem.class_eval do
   
-  has_many :digital_links
+  has_many :digital_links, :dependent => :destroy
   
   after_save :create_digital_links, :if => :digital?
   
@@ -14,6 +14,7 @@ Spree::LineItem.class_eval do
   # Create the download link for this item if it is digital.
   def create_digital_links
     digital_links.delete_all
+
     self.quantity.times do
       digital_links.create!(:digital => variant.digital)
     end