[django]按小时分组统计数据

假设有以下 model:

class Foobar(models.Model):
    name = models.CharField(max_length=100)
    date_created = models.DateField(auto_now_add=True)

    def __unicode__(self):
        return self.name

按小时统计数量的代码如下：

from collections import defaultdict
from django.db import connection
from django.db.models import Count

select = {'hour': connection.ops.date_trunc_sql('hour', 'date_created')}
result = Foobar.objects.extra(select ...
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[django]按月分组统计数据

假设有以下 model:

class Foobar(models.Model):
    name = models.CharField(max_length=100)
    date_created = models.DateField(auto_now_add=True)

    def __unicode__(self):
        return self.name

按月统计数量的代码如下：

from django.db import connection
from django.db.models import Count

select = {'month': connection.ops.date_trunc_sql('month', 'date_created')}
Foobar.objects.extra(select=select).values('month').annotate(number ...
more ...