fix batchsampler does not work correctly

src/lightning/pytorch/utilities/data.py

@@ -349,7 +349,14 @@ def _is_dataloader_shuffled(dataloader: object) -> bool:
  if not hasattr(dataloader, "sampler"):
  # shuffling is enabled via a sampler. No sampler, no shuffling
  return False
- sampler = dataloader.sampler
+
+ batch_sampler = dataloader.batch_sampler
+ if batch_sampler is not None:
+ # batchsize == 1 case:
+ sampler = batch_sampler.sampler
+ else:
+ sampler = dataloader.sampler
+
  if isinstance(sampler, SequentialSampler):
  return False
  return isinstance(sampler, RandomSampler)