Touch record on paranoia-destroy. Fixes #296

Touch record on destroy by leveraging the paranoia_destroy_attributes.
Applied the same to the restore-method as this eliminates the extra query.

lib/paranoia.rb

@@ -110,7 +110,6 @@ def restore!(opts = {})
         if (noop_if_frozen && !@attributes.frozen?) || !noop_if_frozen
           write_attribute paranoia_column, paranoia_sentinel_value
           update_columns(paranoia_restore_attributes)
-          touch
         end
         restore_associated_records if opts[:recursive]
       end
@@ -154,13 +153,17 @@ def really_destroy!
   def paranoia_restore_attributes
     {
       paranoia_column => paranoia_sentinel_value
-    }
+    }.merge(timestamp_attributes_with_current_time)
   end
 
   def paranoia_destroy_attributes
     {
       paranoia_column => current_time_from_proper_timezone
-    }
+    }.merge(timestamp_attributes_with_current_time)
+  end
+
+  def timestamp_attributes_with_current_time
+    timestamp_attributes_for_update_in_model.each_with_object({}) { |attr,hash| hash[attr] = current_time_from_proper_timezone }
   end
 
   # restore associated records that have been soft deleted when

test/paranoia_test.rb

@@ -774,6 +774,13 @@ def test_validates_uniqueness_still_works_on_non_deleted_records
     refute b.valid?
   end
 
+  def test_updated_at_modification_on_destroy
+    paranoid_model = ParanoidModelWithTimestamp.create(:parent_model => ParentModel.create, :updated_at => 1.day.ago)
+    assert paranoid_model.updated_at < 10.minutes.ago
+    paranoid_model.destroy
+    assert paranoid_model.updated_at > 10.minutes.ago
+  end
+
   def test_updated_at_modification_on_restore
     parent1 = ParentModel.create
     pt1 = ParanoidModelWithTimestamp.create(:parent_model => parent1)