Consider the following:
class OrderForm(models.Model):
title = models.CharField(max_length=100)
desc = models.TextField()
class OrderFormLine(models.Model):
order = models.ForeignKey(OrderForm)
lagel = models.CharField(max_length=100)
qty = models.IntegerField(...)
price = models.FloatField(...)
Now I want to send an email with the orderform details whenever someone creates one or modify one.
No rocket science so far .. let's just use a post_save signal;
post_save.connect(email_notify, sender=OrderForm)
But there's one tiny problem, the OrderForm object passed to email_notify is updated with the new data as expected, but not the related OrderFormLine items.
I've tried to override the save methods in the admin AND in the model, I've tried to save the object, the form and its relation before passing it to my notification handler, nothing works.
I'm aware that I could attach the post_save signal to the OrderItem model, but then the email would be sent for each items.
Help I'm on the brink of madness.
UPDATE:
Found a simple and reliable solution
Short story:
def email_notify_orderform(sender, **kwargs):
instance = kwargs['instance']
ct = ContentType.objects.get_for_model(OrderForm)
if ct.id == instance.content_type.id:
print instance.is_addition()
print instance.is_change()
print instance.is_deletion()
print instance.change_message
print instance.action_time
print instance.get_edited_object().total() # BINGO !
post_save.connect(email_notify_orderform, sender=LogEntry)
