are there any conditions where signals are sent twice?
i have these models (among others)
#sales.models.py
class Sale(models.Model):
customer = models.ForeignKey(Customer)
stock = models.ForeignKey(Stock)
quantity = models.IntegerField()
price = models.DecimalField(max_digits=10,decimal_places=2)
date_of_sale = models.DateField()
#other models fields
#summary.models.py
class Summary(models.Model):
stock = models.ForeignKey(Stock)
sales = models.IntegerField()
date = models.DateField()
#other model fields
def update_on_sale(instance):
summary =
Summary.objects.get(stock=instance.stock,date=instance.date_of_sale)
summary.sales += instance.quantity
summary.save()
dispatcher.connect(update_on_sale,signal=signals.post_save,sender=Sale)
I am using the admin site.
i have tests which pass, however when i add a new sale via the admin site,
i noticed that the summary.sales will be twice the sale.quantity
e.g.
after i add a sale with quantity = 5, the summary.sale is incremented by 10
instead of 5
I also use the post_save signal of the Sale model to update
Customer.account_balance
Is there any condition that will make the signal be sent twice?
--
Bayo
Qrapht Software Dev. Co.
http://boyombo.blogspot.com
http://www.qrapht.com
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