Grails: Forget objects in IntegrationSpec setup

Question

So I am working with Grails. My application involves an object coming in, and being updated in the db and returned. It's this behavior I am trying to test in a Spock IntegrationSpec.

Essentially, my test looks like this (pseudo-code)

setUp
{
  Session sess = sessionFactory.openSession();
  Transaction tx = null;
  try{
  ...
  //These loaded fixtures include the shop
  //that I want to update
  fixtures = fixtureLoader.load(fixtureLocationsArray)
  ...
  tx.commit()
  ...
  sessionFactory.currentSession.flush()
  sessionFactory.currentSession.clear()
}

void testUpdate()
{
    Shop shop = fixtures.shop
    shop.discard()

    //Pure, unadulterated desperation below
    sessionFactory.currentSession.flush()
    sessionFactory.currentSession.clear()
    sessionFactory.getCache().evictEntityRegion(Shop)

    ShopDTO shopDto = convertToDTO(shop)
    shopDto.name = "Updated Shop"     

    //Chokes while in the controller
    returnedShopDTO = dtoController.update(shopDto)
}

I have tried everything, including wrapping my fixture creation in a transaction, evicting, discarding and doing whatever I can to make the session "forget" the object. No matter what I do, I always get an error like

org.hibernate.StaleObjectStateException: 
Row was updated or deleted by another transaction 
(or unsaved-value mapping was incorrect)

or it will complain that something with that id already exists in the session. From what I can tell, the entire test occurs in one fat daddy session. So when I go to "update" it inserts the fixture, and then calls "select last_row_id" or something. It then assigns the next id to my updated shop. So in the end, I get two inserts if it doesn't crash, the first from the fixture, the second from my save/merge call.

Any help on creating fixtures, and then making them disappear from the session/transaction/doo-hickey is greatly appreciated.

Answer 1

Turns out I had to disable versioning on my project. I did this by adding the following code to my domain class. I'm not sure if this is the correct solution, but it made the various errors go away.

static mapping = {
    ...
    version false
    ...
}