Fix link in structure

app/models/link.rb

@@ -1,6 +1,8 @@
 class Link < Item
   
   field :url, localize: true
+
+  validates :url, at_least_one: true
   
   # validates :url, :presence => true, :format => /^(http|https):\/\/(([a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,5})|((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?))|localhost(:[0-9]{1,5})?(\/.*)?/i
 
@@ -11,20 +13,27 @@ class Link < Item
   end
 
   def urls
-  	self.url_translations.inject({}) do |result, (key, value)|
-  		result["url-#{key}"] = value
-  		result
-  	end
+    if self.url_translations.present?
+    	self.url_translations.inject({}) do |result, (key, value)|
+    		result["url-#{key}"] = value
+    		result
+    	end
+    else
+      {}
+    end
   end
 
   protected
 
 	def add_http
 		if self.url_translations.present?
-			self.url_translations.each_value do |u|
-				unless u[/^(http|https):\/\//] || u.blank?
-		    	u = 'http://' + u
+      self.url_translations = self.url_translations.inject({}) do |translations, (key, value)|
+				if value.blank? || value[/^(http|https):\/\//]
+          translations[key] = value
+		    else
+          translations[key] = 'http://' + value
 		  	end
+        translations
 		  end
 		end
 	end