async def test_concurrency_create(self):
all_write = await asyncio.gather(
*[Tournament.create(name='Test') for _ in range(100)])
all_read = await Tournament.all()
self.assertEqual(set(all_write), set(all_read))
async def create_trans_concurrent(self):
async with in_transaction():
await asyncio.gather(*[Tournament.create(name="Test") for _ in range(100)])
