Your invoice items have no invoice attribute, as the error says. By the way, although I'm not sure of what you're trying to achieve, let me point out that there is not really a need for a sum field in your invoice as you can just sum all the invoice items' amount (and respect the DRY principle - you use a few other similar issues). Le 26 août 2011 11:35, "Torsten" <[email protected]> a écrit : > Hi > > I have the following model: > > class Invoice(models.Model): > customer = models.ForeignKey(Customer) > project = models.ForeignKey(Project, blank=True, null=True) > sum = models.FloatField(default=0) > tax = models.IntegerField(default=16) > payed_at = models.DateField(blank=True, null=True) > payable_at = models.DateField('payable at') > created_at = models.DateTimeField(auto_now_add=True) > > def invoice_number(self): > invoice_number = str(self.created_at.year) + '/' + > str(self.id) > return invoice_number > > def __unicode__(self): > return unicode(str(self.created_at.year) + '/' + str(self.id)) > > class InvoiceItem(models.Model): > invoice = models.ForeignKey(Invoice) > text = models.TextField() > unit = models.CharField(max_length=255) > amount = models.IntegerField() > sum = models.FloatField() > > and try to run this test > > def test_save_invoice(self): > InvoiceItem.objects.create(sum=12, unit='Stunde', amount=100) > InvoiceItem.objects.create(sum=10, unit='Stunde', amount=120) > invoice = Invoice.objects.create(created_at="2011-07-28", > customer_id=1, payable_at='2012-12-12') > invoice.invoiceitem_set.all() > self.assertEqual(240, invoice.sum) > > with this error: > IntegrityError: invoice_invoiceitem.invoice_id may not be NULL > > since it is the relation id Django should take care for the > invoice_invoiceitem.invoice_id > > Or is there anything wrong with the code ? > > Torsten > > -- > You received this message because you are subscribed to the Google Groups "Django users" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to [email protected]. > For more options, visit this group at http://groups.google.com/group/django-users?hl=en. >
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