On Friday, August 12, 2016 at 1:19:17 PM UTC-6, Todor Velichkov wrote:
>
> Some more code will be helpful, for example the model structure, how do
> you define the the `ForeignKey`? How do you subscribe for the signal?
> You are saying that with sleep(1) the code works fine, is this mean that
> you can reproduce the problem at any time?
> However test it without fetching the blob object, this would probably fix
> the problem:
>
> if widget.blob_id is not None and Widget.objects.filter(blob_id=widget.
> blob_id).count() == 0:
> Blob.objects.filter(id=widget.blob_id).delete()
>
>
Hello Todor,
Your solution worked like a charm. It was fetching the blob object causing
the failure, thank you very much! For the sake of completion, here is the
code you asked for:
class Widget(models.Model):
client = models.ForeignKey(Client, related_name="layers")
label = models.TextField()
blob = models.ForeignKey(Blob, blank=True, null=True)
date_created = models.DateTimeField(auto_now_add=True, blank=True, null=
True)
And the connection is made using
signals.post_delete.connect(postDeleteWidget, sender=Widget).
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