Enter code here...
Hi,
I have a model
class XyzModel (models.Model):
name = models.CharField(max_length=NAME_LENGTH)
unique_id = models.CharField(max_length=NAME_LENGTH)
info = models.CharField(max_length=NAME_LENGTH, blank=True)
violation_time = models.DateTimeField()
I have many rows in the database. So I want to group by the results for
every two hours or for every four hours.
I want the result something like
name violation_date
interval counts
abc 2017-07-01
06:00 - 08:00 20
xyz 2017-07-01
08:00 - 10:00 30
My query is
XyzModel.objects
.extra({"day": "date_trunc('hour',violation_time)"}
.values("day")
.order_by("day")
.annotate(count=Count("id"))
But using this query I can only group the result by one hour interval. I
want to group by more than one hour interval.
Thanks
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