Fix for banner link

app/models/ad_image.rb

@@ -27,7 +27,7 @@ class AdImage
   attr_reader :parse_post_date,:parse_unpost_date
 
   before_validation :add_http
-  validates :out_link, :presence => true, :format => /^(http|https):\/\/[a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,5}(([0-9]{1,5})?\/.*)?$/ix
+  validates :out_link, :format => /^(http|https):\/\/[a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,5}(([0-9]{1,5})?\/.*)?$/ix, :allow_blank => true
 
   def parse_post_date=(att)
     self.post_date = (Date.parse att.gsub(/\s+/, "") rescue nil)
@@ -59,7 +59,7 @@ class AdImage
   protected
 
   def add_http
-    unless self.out_link[/^http:\/\//] || self.out_link[/^https:\/\//]
+    unless self.out_link[/^http:\/\//] || self.out_link[/^https:\/\//] || self.out_link.blank?
       self.out_link = 'http://' + self.out_link
     end
   end