Hey guys, I'm having a problem that I don't know if there is any
feature that I can use to filter a list in django.
What I'm trying to do is to use a manual get_or_create. I have the
following models:
class STREAM(models.Model):
stream_inds = models.ManyToManyField('STREAM_Ind')
Type = models.CharField(max_length = 5)
Throughput = models.DecimalField(max_digits = 15,
decimal_places = 3)
class STREAM_Ind(models.Model):
Port = models.IntegerField()
Throughput = models.DecimalField(max_digits = 15,
decimal_places = 3)
What I've tried to do so far is this:
try:
qset = (
Q(stream_inds__pk__iexact = ids) &
Q(Type__iexact = type) &
Q(Throughput__iexact = throughput)
)
streams =
STREAM.objects.select_related().filter(qset).distinct().get()
except
STREAM.DoesNotExist:
fields = {
'Type': type,
'Throughput': throughput,
}
form =
STREAMForm(fields)
streams =
form.save()
The third line is where I think the problem is, ids is a variable that
contains a list of id that are supposed to match with all the primary
keys of the STREAM_Ind model. So I can be sure that the data is
already in the database, but the first Q object i think always return
false. Is there some way to do it? (I thought about using the "in"
feature, but I need to make sure all pk are matched in order to
retrieve the object, not just one of them). Is there a feature that
allow me to do that? If not can you guys give me a hint of what am I
supposed to do?
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