Question

I have model containing “caller_name” and “call_datetime” field.

I was able to get number of calls occurred on each day in particular month:

while start_date <= end_date:
    calls = CDR.objects.filter(start_time__year=str(start_date.year), start_time__month=str(start_date.month), 
                                    start_time__day=str(start_date.day))
    print "Number of calls:", len(calls)
    start_date = start_date + datetime.timedelta(days=1)

Similarlly, I tried to get number of calls on each hour in particular date.

for i in range(24):
    calls = CDR.objects.filter(start_time__year=str(start_date.year), start_time__month=str(start_date.month),start_time__day=str(start_date.day), start_time__hour=str(i))

Found out that “start_time__hour” is not implemented, but in their any way to achieve this?

Answer 1

Try this workaround:

day_calls = CDR.objects.filter(start_time__year=str(start_date.year), start_time__month=str(start_date.month),start_time__day=str(start_date.day))

hour_calls = day_calls.extra(select={'hours': 'DATE_FORMAT(start_date, "%%H")'})\
                      .values_list('hours', flat=True)\
                      .distinct()\
                      .order_by('hours')