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Message from discussion How to build this query
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Nikolas Stevenson-Molnar  
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 More options Nov 9 2012, 12:14 pm
From: Nikolas Stevenson-Molnar <nik.mol...@consbio.org>
Date: Fri, 09 Nov 2012 09:13:36 -0800
Local: Fri, Nov 9 2012 12:13 pm
Subject: Re: How to build this query
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That looks correct, though you don't need distinct('id'), since
presumably id is your primary key and will already be unique.

_Nik

On 11/9/2012 1:01 AM, ozgur yilmaz wrote:

> Maybe:
> paris_discounts = Discount.objects.filter( brand__shop__city__name =
> 'Paris' ).distinct('id')

> What do you think?

> 2012/11/9 ozgur yilmaz <yelb...@gmail.com>:
>> But Brand doesnt have a city field. Shop class has a city field.

>> 2012/11/9 Jirka Vejrazka <jirka.vejra...@gmail.com>:
>>> paris_discounts = Discount.objects.filter(brand__city__name='Paris')  ?

>>>   Note that these are always *double* underscores and I had to make a guess
>>> that your City has an attribute "name".

>>>   HTH

>>>     Jirka

>>> On Fri, Nov 9, 2012 at 9:12 AM, ozgur yilmaz <yelb...@gmail.com> wrote:
>>>> Hi all,

>>>> I hope i can explain my query problem well. Think you have 3 classes:

>>>> class City( models.Model ):
>>>> ...
>>>> ...

>>>> class Brand( models.Model ):
>>>> ...
>>>> ...

>>>> class Shop( models.Model ):
>>>>    brand = models.ForeignKey( Brand )
>>>>    city = models.ForeignKey( City )
>>>> ...
>>>> ...

>>>> class Discount( models.Model ):
>>>>    brand = models.ForeignKey( Brand )
>>>> ...
>>>> ...

>>>> Think a Shop sell products of a single Brand. I have lots of Discount
>>>> records. But i'm interested in Discounts at Shops in Paris. Is there
>>>> any?

>>>> Can you help me?

>>>> Thanks,

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