Re: How to aggregate values by month

Hi Franklin!

Thanks for you answer. Unfortunatelly I need to output my results on a JSON file. Do you have any other approach?

Cheers,

Rogério Carrasqueira

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2010/10/28 Franklin Einspruch <franklin.einspruch@gmail.com>

It may not be a complete answer, but you should know about {% regroup
%} just in case:

http://docs.djangoproject.com/en/dev/ref/templates/builtins/?from=olddocs#regroup

- Franklin

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2010/10/28 Rogério Carrasqueira <rogerio.carrasqueira@gmail.com>:

> Hello!
>
> I'm having an issue to make complex queries in django. My problem is, I have
> a model where I have the sales and I need to make a report showing the sales
> amount per month, by the way I made this query:
>
> init_date = datetime.date(datetime.now()-timedelta(days=365))
> ends_date = datetime.date(datetime.now())
> sales =
> Sale.objects.filter(date_created__range=(init_date,ends_date)).values(date_created__month).aggregate(total_sales=Sum('total_value'))
>
> At the first line I get the today's date past one year
> after this I got the today date
>
> at sales I'm trying to between a range get the sales amount grouped by
> month, but unfortunatelly I was unhappy on this, because this error
> appeared:
>
> global name 'date_created__month' is not defined
>
> At date_created is the field where I store the information about when the
> sale was done., the __moth was a tentative to group by this by month.
>
> So, my question: how to do that thing without using a raw sql query and not
> touching on database independence?
>
> Thanks so much!
>
> Rogério Carrasqueira
>
> ---
> e-mail: rogerio.carrasqueira@gmail.com
> skype: rgcarrasqueira
> MSN: rcarrasqueira@hotmail.com
> ICQ: 50525616
> Tel.: (11) 7805-0074
>

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