>
> > > I have the following classes in my models.py:
>
> > > class Default(models.Model):
> > > name = models.CharField(max_length=50, choices =
> > > (('rental_period', 'rental_period'), ('currency', 'currency')),
> > > unique=True)
> > > value = models.CharField(max_length=50)
>
> > > class Media_biz(models.Model):
> > > name = models.CharField(max_length=50)
> > > currency = models.ForeignKey(Currency)
> > > rental_period = models.CharField(max_length=5, blank=True,
> > > null=True)
>
> > > What I want is:
> > > When I add new Media_biz in my admin page, I want to check if there is
> > > a Default object with the name "currency" or "rental_period" and take
> > > it's value as default.
>
> > You want to take its value as default for what field of Media_biz? And
> > if you have two Default instances (one for currency and another for
> > rental_period), which one provides the default value?
> Each Default instance provide default value for one of the fields:
> I want to take the default value of rental_period to rental_period and
> default value of currency to currency.
> The value of the currency should be the name of Currency object for
> foreign key.
You can override your Media_biz admin model's get_form method and
inject your initial values. It would be something like this:
def get_form(self, request, obj=None, **kwargs):
form = super(YourMedia_bizAdmin, self).get_form(request, obj,
**kwargs)
try:
currency_default = Default.objects.get(name='currency')
currency = Currency.objects.get(name=currency_default.value)
form.fields['currency'].initial = currency.pk
except Default.DoesNotExist:
pass
try:
rental_default = Default.objects.get(name='rental_period')
form.fields['rental_period'].initial = rental_default.value
except Default.DoesNotExist:
pass
return form
-RD
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