Question

我希望在django模型中执行一个操作，在那里我提取最后10分钟的条目并对其进行一些数据处理并返回一个值。

我已经尝试过以下代码，但没有运气。对此有任何帮助都很棒。

class Data(models.Model):
    time_measured = models.DateTimeField(help_text='Time the data was measured.')
    int_val = models.DecimalField(max_digits=10, decimal_places=2,blank=True)

    def trend(self):
        range_start = self.time_measured.minute - timedelta(minute=10)
        data = Data.objects.filter(time_measured__minute__range=(range_start, self.time_measured.minute))
    return float(data_operation(data.int_val))

Answer 1

def trend(self):
    range_start = datetime.datetime.now() - timedelta(minutes=10)
    data = Data.objects.filter(time_measured__gte=range_start)

Answer 2

我会尝试类似的事情：

def trend(self):
    range_start = self.time_measured.minute - timedelta(minute=10)
    data = Data.objects.filter(time_measured__minute__gt=range_start)
return float(data_operation(data))

django模型中的时间过滤

2 个答案: