Thanks for that, but I still get the error message:
Exception Type: IntegrityError
Exception Value: invoice_invoice.payed_at may not be NULL
here my models.py:
from django.db import models
class Customer(models.Model):
company = models.CharField(max_length=255)
branch = models.CharField(max_length=255)
firstname = models.CharField(max_length=255)
lastname = models.CharField(max_length=255)
street = models.CharField(max_length=255)
zip = models.CharField(max_length=6)
country = models.CharField(max_length=255)
email = models.CharField(max_length=255)
created_at = models.DateTimeField('date created')
def __unicode__(self):
return self.company
class Project(models.Model):
title = models.CharField(max_length=255);
created_at = models.DateTimeField('date created')
def __unicode__(self):
return self.title
class Invoice(models.Model):
customer = models.ForeignKey(Customer)
project = models.ForeignKey(Project, null=True)
sum = models.FloatField(default=0)
tax = models.IntegerField(default=16)
payed_at = models.DateTimeField(default=None)
payable_at = models.DateField('payable at')
created_at = models.DateTimeField(False, True)
class InvoiceItem(models.Model):
invoice = models.ForeignKey(Invoice)
text = models.TextField()
unit = models.CharField(max_length=255)
amount = models.IntegerField()
sum = models.FloatField()
On 21 Aug., 15:19, dm03514 <dm03...@gmail.com> wrote:
> you can set default=None, that way you don't have to explicityly save
> that value as none every time you save an object.
>
> On Aug 21, 7:33 am, Torsten <torstenzan...@googlemail.com> wrote:
>
>
>
>
>
>
>
> > Hi
>
> > I simply want the DateTime to be set to null.
>
> > payed_at = models.DateTimeField(null=True)
>
> > but always get this as an error:
>
> > IntegrityError at /admin/invoice/invoice/add/
> > invoice_invoice.payed_at may not be NULL
>
> > Thanks for help.
>
> > Torsten
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