I need to send an e-mail when new instance of Entry
model is created via admin panel. So in models.py
I have:
class Entry(models.Model):
attachments = models.ManyToManyField(to=Attachment, blank=True)
#some other fields
#...
sent = models.BooleanField(editable=False, default=False)
Then I'm registring post_save handler function:
def send_message(sender, instance, **kwargs):
if not instance.sent:
#sending an e-mail message containing details about related attachments
#...
instance.sent = True
instance.save()
post_save.connect(send_message, sender=Entry)
It works, but as I mentioned before, I also need to access related attachments to include their details in the message. Unfortunatelly instance.attachments.all()
returns empty list inside send_message
function even if attachments were actually added.
As I figured out, when the post_save signal is sent, related data of saved model isn't saved yet, so I can't get related attachments from that place.
Мне было интересно, однако, как Clojure подходит для графических баз данных, таких как Neo4j?