Hi. I don't need a total counter for all related activities. I need a
counter for each related Activity:
Invoice instance:
activity A -> counter: 3
activity B -> counter: 5
...
...
is this possible?
thanks,
Luke
Il giorno martedì 13 novembre 2012 23:25:28 UTC+1, Nikolas Stevenson-Molnar
ha scritto:
>
> With an Invoice instance, you can easily get the number of related
> Activity objects:
>
> i = Invoice.objects.get(pk=1)
> num_activities = i.activities.all().count()
>
> _Nik
>
> On 11/13/2012 12:49 PM, luke lukes wrote:
>
> Hi everyone. hi have these models:
>
> #models.py
>
> class Subject(models.Model):
> name = models.CharField("Name",max_length=50, blank=True)
> ...
> ...
>
> class Activity(models.Model):
> label = models.CharField("Act. name",max_length=150)
> price = models.DecimalField("price", max_digits=10,
> decimal_places=2,default=0)
> count = models.IntegerField("Count", default=0)
>
> def __unicode__(self):
> return u"%s" % (self.label)
> class Meta:
> verbose_name_plural = "Activities"
>
>
> class Invoice(models.Model):
> subject = models.ForeignKey(Subject)
> date = models.DateField(default=date.today())
> activities = models.ManyToManyField(Activity)
> ....
> ....
>
>
> while creating a new Invoice instance on admin, i can select the many to
> many fields 'activities', but i'd like to have an additional counter (eg.
> an IntegerField) as an Invoice field to count and save the quantity of each
> activity added to my Invoice instance. Is this possible?
>
> I mean: for each 'Activity' added to an Invoice instance, i need to count
> the amount of that activity.
>
>
> thanks,
>
> LuKe
>
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