Question

我有一个带有API的django应用程序。我创建了许多类似的查询：

class ShellMessageFilter(django_filters.FilterSet):
    created = django_filters.DateTimeFilter(name="created",lookup_type="gte")

    class Meta:
        model = Server
        fields = ['created']


class ServersDateList(ListAPIView):
    serializer_class = ServerSerializer
    queryset = Server.objects.all()
    filter_class = ShellMessageFilter

从URL获取日期戳并过滤它。但是现在我需要创建新的过滤器，显示最近两小时更新的服务器模型。我怎么能这样做？

我会尝试这样的事情，但过滤器会被破坏并显示所有项目：

class ShellMessageFilter2Hour(django_filters.FilterSet):

    import datetime

#    lastTwoHourDateTime = datetime.datetime.now() - datetime.timedelta(hours = 1)
#    last_update = django_filters.DateTimeFilter(name=str(lastTwoHourDateTime.strftime('%Y-%m-%d %H:%M')),lookup_type="gte")

#    last_update2 = datetime.datetime.now() - datetime.timedelta(minutes = 10)
#    last_update = last_update2.strftime('%Y-%m-%d+%H:%M')

    last_update = django_filters.DateTimeFilter("2016-04-23T15:31:50")
    created = django_filters.DateTimeFilter(name="last_update",lookup_type="gte")

    class Meta:
        model = Server
        fields = ['last_update']


class ServersDate2HourList(ListAPIView):
    serializer_class = ServerSerializer
    queryset = Server.objects.all()
    filter_class = ShellMessageFilter2Hour

请帮忙，我的错误在哪里？

Answer 1

在这种情况下，MethodFilter是您的朋友，并且您可以为视图使用一个过滤器类。

你可以这样实现：

class ShellMessageFilter(django_filters.FilterSet):
    def updates_in_last_two_hours(self, value):
        # You can toggle the value between True and False
        if value == 'true':
             right_now = datetime.datetime.now()
             last_two_hours = right_now - datetime.timedelta(hours=2)
             return self.filter(created__gte=last_two_hours)
        else:
            return self.filter()
    created = django_filters.DateTimeFilter(name="created",lookup_type="gte")
    updated_last_two_hours = django_filters.MethodFilter(
        action=updates_in_last_two_hours)

class Meta:
    model = Server
    fields = ['created', 'updated_last_two_hours']

然后你可以在视图中使用updated_last_two_hours吗？updated_last_two_hours = true

DateTime过滤器对django过滤器的问题

1 个答案: