don't save when destroying a non persisted object

lib/acts_as_paranoid/core.rb

@@ -106,7 +106,7 @@ def destroy
         with_transaction_returning_status do
           run_callbacks :destroy do
             # Handle composite keys, otherwise we would just use `self.class.primary_key.to_sym => self.id`.
-            self.class.delete_all(Hash[[Array(self.class.primary_key), Array(self.id)].transpose])
+            self.class.delete_all(Hash[[Array(self.class.primary_key), Array(self.id)].transpose]) if persisted?
             self.paranoid_value = self.class.delete_now_value
             self
           end

test/test_core.rb

@@ -63,6 +63,10 @@ def test_real_removal
     assert_empty ParanoidTime.with_deleted.all
   end
 
+  def test_removal_not_persisted
+    assert ParanoidTime.new.destroy
+  end
+
   def test_recovery
     assert_equal 3, ParanoidBoolean.count
     ParanoidBoolean.first.destroy