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18 lines
505 B
Python
18 lines
505 B
Python
"""数据库技术边界的连通性探测实现。"""
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from sqlalchemy import text
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from app.db.session import SessionFactory
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def probe_database() -> str | None:
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"""执行最小数据库查询，成功返回空值，失败返回错误文本。"""
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session = SessionFactory()
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try:
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session.execute(text("SELECT 1"))
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except Exception as err: # noqa: BLE001 探测需要把驱动错误转为诊断文本
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return str(err)
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finally:
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session.close()
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return None
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