如何在以下查询中过滤 row_number ==1 ：
query = session.query(Foo, func.row_number().over(
partition_by=Foo.foo_field, order_by=desc(Foo.foo_date_time)).label("row_number"))
query = query.filter(Foo.time_key <= time_key)
# query = query.filter(row_number == 1)
result = query.all()
我找到了：
row_number_column = func.row_number().over(partition_by=Foo.foo_field, order_by=desc(Foo.foo_date_time)).label('row_number')
query = self.session.query(Foo)
query = query.filter(Foo.time_key <= time_key)
query = query.add_column(row_number_column)
query = query.from_self().filter(row_number_column == 1)
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