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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