Update attributes for single linked associated objects

lib/associations/has-many-single-linked.js

@@ -33,7 +33,10 @@ module.exports = (function() {
 
     if (obsoleteAssociations.length > 0) {
       // clear the old associations
-      var obsoleteIds = obsoleteAssociations.map(function(associatedObject) { return associatedObject.id })
+      var obsoleteIds = obsoleteAssociations.map(function(associatedObject) { 
+        associatedObject[self.__factory.identifier] = null
+        return associatedObject.id
+      })
 
       update = {} 
       update[self.__factory.identifier] = null
@@ -42,7 +45,10 @@ module.exports = (function() {
 
     if (unassociatedObjects.length > 0) {
       // set the new associations
-      var unassociatedIds = unassociatedObjects.map(function(associatedObject) { return associatedObject.id })
+      var unassociatedIds = unassociatedObjects.map(function(associatedObject) { 
+        associatedObject[self.__factory.identifier] = self.instance.id
+        return associatedObject.id 
+      })
 
       update = {}
       update[self.__factory.identifier] = self.instance.id