That would be blank = True Le 26 août 2011 11:58, "Kejun He" <[email protected]> a écrit : > Sometime, set null = true would allow a field to be empty > > On Fri, Aug 26, 2011 at 5:41 PM, Thomas Orozco <[email protected] >wrote: > >> 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. >> > >> >> -- >> 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. >> > > -- > 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. >
-- 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.
