Django ORM datetime __range 字段查找未正确过滤

Question

我有一个简单的查询，我检索从当前日期的上午 12 点到当前时间的所有行。

time_now = datetime.now()
time_passed = time_now.hour * 60 + time_now.minute
a = (datetime.now() - timedelta(minutes=time_passed))
b = datetime.now()
result_inwardCount = MYmsEvents.objects.all().filter(recorded_at__range=[a, b],event='In-ward')
print(result_inwardCount.query)
print(len(result_inwardCount))

现在当我打印查询时，它给了我这个：

SELECT "m_yms_events"."id", "m_yms_events"."vin", "m_yms_events"."event", "m_yms_events"."location", "m_yms_events"."recorded_at", "m_yms_events"."sys_id", "m_yms_events"."x", "m_yms_events"."y", "m_yms_events"."last_updated" FROM "m_yms_events" WHERE ("m_yms_events"."event" = In-ward AND "m_yms_events"."recorded_at" BETWEEN 2021-05-19 00:00:37+05:30 AND 2021-05-19 16:49:37+05:30)

这给了我0 的结果。当我在pgAdmin 中运行相同的查询时，它给了我41 行。 以下是添加撇号后的查询：

SELECT "m_yms_events"."id", "m_yms_events"."vin", "m_yms_events"."event", "m_yms_events"."location", "m_yms_events"."recorded_at", "m_yms_events"."sys_id", "m_yms_events"."x", "m_yms_events"."y", "m_yms_events"."last_updated" FROM "m_yms_events" WHERE ("m_yms_events"."event" = 'In-ward' AND "m_yms_events"."recorded_at" BETWEEN '2021-05-19 00:00:37+05:30' AND '2021-05-19 16:49:37+05:30')

Postgres 中的时区是 IST，服务器上的时区也是。

Answer 1

Django __range 字段查找直接与datetimes 一起使用，如您在Django documentation 中所见。

这是一个简单的工作示例：

import datetime
start_date = datetime.date(2005, 1, 1)
end_date = datetime.date(2005, 3, 31)
Entry.objects.filter(pub_date__range=(start_date, end_date))

在您的具体情况下，只需删除将您的 datetimes 转换为 strings (.strftime('%Y-%m-%d %H:%M:%S')) 的代码部分：

a = (datetime.now() - timedelta(minutes=time_passed))
b = datetime.now()
result_inwardCount = MYmsEvents.objects.all().filter(recorded_at__range=[a, b], event='In-ward')