Have been reluctant to post on this one as have come across many many
discussion during the 3 days of lack of success on resolving this
issue, but none has left me with a solution.
I have a form with a dropdown generated from a query.
This is in the form:
carmake = forms.ChoiceField(choices=Carmake.get_makelist(),
label='Make')
This is in the model:
class Carmake(models.Model):
name = models.CharField('Make', max_length=20)
def __unicode__(self):
return self.name
@classmethod
def get_makelist(a):
return [('Any', 'Any Make')] + [(item, item) for item in
Car.objects.all().values_list('model__make__name',
flat=True).select_related().distinct()]
Predictably, the dropdown doesn't update when new makes are added
unless I restart the apache server. I have tried everything suggested
by other posts and the example above is a close as I can get to the
example in the documentation that suggests these two queries will both
be evaluated.
>>> print [e.headline for e in Entry.objects.all()]
>>> print [e.pub_date for e in Entry.objects.all()]
I understand this has been discussed to death, but can someone please
enlighten me on a solution which will ALWAYS re-evaluate this query??
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