many_to_many.rb in mongoid-3.0.14

- old
+ new

@@ -119,10 +119,11 @@
         # @since 2.1.0
         def delete(document)
           doc = super
           if doc && persistable?
             base.pull(foreign_key, doc.id)
+            target._unloaded = criteria
             unsynced(base, foreign_key)
           end
           doc
         end
 
@@ -167,10 +168,14 @@
         # @return [ Many ] The relation.
         #
         # @since 2.0.0.rc.1
         def substitute(replacement)
           purge
-          push(replacement.compact.uniq) unless replacement.blank?
+          unless replacement.blank?
+            push(replacement.compact.uniq)
+          else
+            reset_relation_criteria
+          end
           self
         end
 
         # Get a criteria for the documents without the default scoping
         # applied.