mirror of
https://github.com/apache/superset.git
synced 2026-07-12 01:35:36 +00:00
a899e1db41
Co-authored-by: Mike Bridge <michael.bridge@ext.preset.io> Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
51 lines
1.9 KiB
Python
51 lines
1.9 KiB
Python
# Licensed to the Apache Software Foundation (ASF) under one
|
|
# or more contributor license agreements. See the NOTICE file
|
|
# distributed with this work for additional information
|
|
# regarding copyright ownership. The ASF licenses this file
|
|
# to you under the Apache License, Version 2.0 (the
|
|
# "License"); you may not use this file except in compliance
|
|
# with the License. You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing,
|
|
# software distributed under the License is distributed on an
|
|
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
|
# KIND, either express or implied. See the License for the
|
|
# specific language governing permissions and limitations
|
|
# under the License.
|
|
"""Shared session helpers used by the entity-versioning machinery."""
|
|
|
|
from __future__ import annotations
|
|
|
|
from typing import Any
|
|
|
|
import sqlalchemy as sa
|
|
from sqlalchemy.orm import Session
|
|
|
|
|
|
def read_row_outside_flush(
|
|
session: Session, table: sa.Table, entity_id: int
|
|
) -> dict[str, Any] | None:
|
|
"""Read the row with ``id == entity_id`` from *table* without triggering
|
|
an autoflush. Returns the row as a plain dict, or ``None`` when no row
|
|
matches.
|
|
|
|
A read primitive for listeners that need pre-flush state (the row as it
|
|
existed *before* the in-flight edit was staged) — without ``no_autoflush``,
|
|
the
|
|
``session.connection().execute(...)`` would itself trigger a flush of
|
|
the pending edit, leaving "pre" and "post" indistinguishable.
|
|
|
|
Returns ``dict[str, Any]`` rather than ``RowMapping`` so callers don't
|
|
accidentally hold a cursor-bound object past the listener boundary.
|
|
"""
|
|
with session.no_autoflush:
|
|
result = (
|
|
session.connection()
|
|
.execute(sa.select(table).where(table.c.id == entity_id))
|
|
.mappings()
|
|
.one_or_none()
|
|
)
|
|
return dict(result) if result else None
|