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fix: defer on_create/on_update/on_delete dispatch until outermost transaction commits (#172)

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d3vyce
2026-03-24 19:56:03 +01:00
committed by GitHub
parent 6981c33dc8
commit 6681b7ade7
1 changed files with 20 additions and 0 deletions
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20
src/fastapi_toolsets/models/watched.py
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@@ -26,6 +26,7 @@ _SESSION_PENDING_NEW = "_ft_pending_new"
_SESSION_CREATES = "_ft_creates"
_SESSION_DELETES = "_ft_deletes"
_SESSION_UPDATES = "_ft_updates"
_SESSION_SAVEPOINT_DEPTH = "_ft_sp_depth"
class ModelEvent(str, Enum):
@@ -92,6 +93,22 @@ def _upsert_changes(
pending[key] = (obj, changes)
@event.listens_for(AsyncSession.sync_session_class, "after_transaction_create")
def _after_transaction_create(session: Any, transaction: Any) -> None:
if transaction.nested:
session.info[_SESSION_SAVEPOINT_DEPTH] = (
session.info.get(_SESSION_SAVEPOINT_DEPTH, 0) + 1
)
@event.listens_for(AsyncSession.sync_session_class, "after_transaction_end")
def _after_transaction_end(session: Any, transaction: Any) -> None:
if transaction.nested:
depth = session.info.get(_SESSION_SAVEPOINT_DEPTH, 0)
if depth > 0: # pragma: no branch
session.info[_SESSION_SAVEPOINT_DEPTH] = depth - 1
@event.listens_for(AsyncSession.sync_session_class, "after_flush")
def _after_flush(session: Any, flush_context: Any) -> None:
# New objects: capture references while session.new is still populated.
@@ -189,6 +206,9 @@ def _schedule_with_snapshot(
@event.listens_for(AsyncSession.sync_session_class, "after_commit")
def _after_commit(session: Any) -> None:
if session.info.get(_SESSION_SAVEPOINT_DEPTH, 0) > 0:
return
creates: list[Any] = session.info.pop(_SESSION_CREATES, [])
deletes: list[Any] = session.info.pop(_SESSION_DELETES, [])
field_changes: dict[int, tuple[Any, dict[str, dict[str, Any]]]] = session.info.pop(