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
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