34 lines
1.0 KiB
Python
34 lines
1.0 KiB
Python
"""修复已撤回 migration 写入的 alembic_version（跨环境一次性兼容）。"""
|
||
|
||
from __future__ import annotations
|
||
|
||
from sqlalchemy import Connection, text
|
||
|
||
_WITHDRAWN_0020_REVISIONS = frozenset(
|
||
{
|
||
"0020_add_tts_audio_urls_column",
|
||
"0020_backfill_missing_schema",
|
||
"0020_backfill_all_missing_columns",
|
||
}
|
||
)
|
||
_REPAIR_TARGET_REVISION = "0018_users_language_preference"
|
||
|
||
|
||
def try_repair_withdrawn_0020_revision(conn: Connection) -> bool:
|
||
"""
|
||
若当前 stamp 为已撤回的 0020_*，回退到 0018 以便重新执行 0019_align_legacy_schema。
|
||
|
||
返回 True 表示已执行 UPDATE；调用方负责 commit。
|
||
"""
|
||
row = conn.execute(text("SELECT version_num FROM alembic_version")).fetchone()
|
||
if row is None:
|
||
return False
|
||
current = row[0]
|
||
if current not in _WITHDRAWN_0020_REVISIONS:
|
||
return False
|
||
conn.execute(
|
||
text("UPDATE alembic_version SET version_num = :target"),
|
||
{"target": _REPAIR_TARGET_REVISION},
|
||
)
|
||
return True
|