sqlalchemy 自动过滤逻辑删除（软删除）记录

class SoftDeleteModel:
    '''逻辑删除基类
    用来实现逻辑删除。
    继承这个基类的子类需要在数据库的列中存在deleted_at列，类型为varchar。
    '''
    deleted_at: Mapped[str] = mapped_column(String(50), default=None)

class User(Base,SoftDeleteModel): 
    
    __tablename__ = "user"
    
    id:Mapped[int]=mapped_column(autoincrement=True,primary_key=True)
    phone_number:Mapped[str]=mapped_column(String(11))
　　...

@event.listens_for(Session, "do_orm_execute")
def _add_filtering_deleted_at(execute_state):
    """
    自动过滤掉被软删除的数据。
    deleted_at不为null即为被软删除。
    使用以下方法可以获得被软删除的数据。
    query(...).filter(...).execution_options(include_deleted=True)
    """
    if (
        execute_state.is_select
        and not execute_state.is_column_load
        and not execute_state.is_relationship_load
        and not execute_state.execution_options.get("include_deleted", False)
    ):
        execute_state.statement = execute_state.statement.options(
            with_loader_criteria(
                SoftDeleteModel,
                lambda cls: cls.deleted_at.is_(None), # deleted_at列为空则为未被软删除
                include_aliases=True,
            )
        )