def _recursive_delete(
self,
reference: Union[CollectionReference, DocumentReference],
*,
bulk_writer: Optional["BulkWriter"] = None,
chunk_size: Optional[int] = 5000,
depth: Optional[int] = 0,
) -> int:
"""Recursion helper for `recursive_delete."""
from google.cloud.firestore_v1.bulk_writer import BulkWriter
bulk_writer = bulk_writer or BulkWriter()
num_deleted: int = 0
if isinstance(reference, CollectionReference):
chunk: List[DocumentSnapshot]
for chunk in (reference.recursive().select(
[FieldPath.document_id()])._chunkify(chunk_size)):
doc_snap: DocumentSnapshot
for doc_snap in chunk:
num_deleted += 1
bulk_writer.delete(doc_snap.reference)
elif isinstance(reference, DocumentReference):
col_ref: CollectionReference
for col_ref in reference.collections():
num_deleted += self._recursive_delete(
col_ref,
bulk_writer=bulk_writer,
chunk_size=chunk_size,
depth=depth + 1,
)
num_deleted += 1
bulk_writer.delete(reference)
else:
raise TypeError(
f"Unexpected type for reference: {reference.__class__.__name__}"
)
if depth == 0:
bulk_writer.close()
return num_deleted
async def _recursive_delete(
self,
reference: Union[AsyncCollectionReference, AsyncDocumentReference],
bulk_writer: "BulkWriter",
*,
chunk_size: Optional[int] = 5000,
depth: Optional[int] = 0,
) -> int:
"""Recursion helper for `recursive_delete."""
num_deleted: int = 0
if isinstance(reference, AsyncCollectionReference):
chunk: List[DocumentSnapshot]
async for chunk in reference.recursive().select(
[FieldPath.document_id()])._chunkify(chunk_size):
doc_snap: DocumentSnapshot
for doc_snap in chunk:
num_deleted += 1
bulk_writer.delete(doc_snap.reference)
elif isinstance(reference, AsyncDocumentReference):
col_ref: AsyncCollectionReference
async for col_ref in reference.collections():
num_deleted += await self._recursive_delete(
col_ref,
bulk_writer=bulk_writer,
depth=depth + 1,
chunk_size=chunk_size,
)
num_deleted += 1
bulk_writer.delete(reference)
else:
raise TypeError(
f"Unexpected type for reference: {reference.__class__.__name__}"
)
if depth == 0:
bulk_writer.close()
return num_deleted