fix(database): 修复 detached 对象延迟加载导致的 greenlet 错误
问题: - CRUD 返回的对象在 session 关闭后变为 detached 状态 - 访问属性时 SQLAlchemy 尝试延迟加载,但没有 session - 导致: greenlet_spawn has not been called 根本原因: - SQLAlchemy 对象在 session 外被访问 - 延迟加载机制尝试在非异步上下文中执行异步操作 修复方案: 1. CRUDBase.get_by(): 在 session 内预加载所有列 2. CRUDBase.get_multi(): 在 session 内预加载所有实例的所有列 3. PersonInfo.get_value(): 添加异常处理,防御性编程 影响: - 所有通过 CRUD 获取的对象现在都完全加载 - 避免了 detached 对象的延迟加载问题 - 可能略微增加初始查询时间,但避免了运行时错误
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@@ -113,10 +113,19 @@ class CRUDBase:
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result = await session.execute(stmt)
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instance = result.scalar_one_or_none()
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# 写入缓存
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if instance is not None and use_cache:
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cache = await get_cache()
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await cache.set(cache_key, instance)
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if instance is not None:
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# 触发所有列的加载,避免 detached 后的延迟加载问题
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# 遍历所有列属性以确保它们被加载到内存中
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for column in self.model.__table__.columns:
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try:
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getattr(instance, column.name)
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except Exception:
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pass # 忽略访问错误
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# 写入缓存
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if use_cache:
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cache = await get_cache()
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await cache.set(cache_key, instance)
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return instance
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@@ -166,6 +175,14 @@ class CRUDBase:
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result = await session.execute(stmt)
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instances = result.scalars().all()
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# 触发所有实例的列加载,避免 detached 后的延迟加载问题
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for instance in instances:
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for column in self.model.__table__.columns:
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try:
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getattr(instance, column.name)
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except Exception:
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pass # 忽略访问错误
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# 写入缓存
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if use_cache:
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cache = await get_cache()
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