Hi, @Vijay you suggestion not working no increment the field_count :/ any
other idea
Cheers
On Thu, Oct 16, 2014 at 2:44 PM, Vijay Khemlani <vkhem...@gmail.com> wrote:
> I think the argument to the F object should be just the name of the field
> on ModelA:
>
> product.field_count = F('field_count') + 1
>
> Other than that, there are a few weird things about the code, for example:
>
> product = ModelA.objects.get(id=self.fk_name.id)
>
> Why not just use
>
> product = self.fk_name ?
>
> On Thu, Oct 16, 2014 at 5:09 PM, carlos <crocha09...@gmail.com> wrote:
>
>> Hi, i need update a fields the other model i have FK relation
>> ok this is my code
>>
>> ModelA(models.Model):
>> name=charfield(...)
>> field_count = integerfield()
>> .....
>>
>> ModelB(models.Model):
>> fk_name = FK(ModelA, related_name='models_a')
>> # other fields
>> ....
>> def save(self, *args, **kwargs):
>> super(ModelB, self).save(*args, **kwargs)
>> if ModelB.objects.filter(fk_name=self.fk_name):
>> product = ModelA.objects.get(id=self.fk_name.id)
>> print product #this good retrieve this information ModelA
>> product.field_count = F('self.fk_name.field_count') + 1
>> product.save(update_fields=['field_count'])
>>
>> but not working not increment data in my field ModelA fiels_count :(
>>
>> any help?
>>
>> i read this doc
>> https://docs.djangoproject.com/en/1.6/ref/models/instances/#updating-attributes-based-on-existing-fields
>>
>> Cheers
>>
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