Django One to One - Don't want delete related model

Question

So here is the problem. I got 2 models: RefereeLevel and Referee Here is both: ``` class RefereeLevel(models.Model): level = models.PositiveSmallIntegerField(blank=False,default=1,verbose_name=_("level"),unique=True) salary = models.DecimalField(blank=False,default=0.00,decimal_places=2,max_digits=4,verbose_name=_("salary")) def __unicode__(self): # Python 2.7: def __unicode__(self): return self.level ``` And the second class: ``` class Referee(models.Model): member = models.OneToOneField(Member,related_name='member',blank=False) information = models.ForeignKey(RefereeLevel,related_name='information',blank=False,null=True,default=1) ``` What happens now is that if I delete a RefereeLevel, the Referee with that level is deleted. But I don't want that, I want the Referee's information be set to none. Is that possible? Thanks, Ara

Accepted Answer

You need to set the on_delete parameter.

In your case :

```
information = models.ForeignKey(RefereeLevel,related_name='information',blank=False,null=True,default=1, on_delete=models.SET_NULL
```

Django One to One - Don't want delete related model

Solution

Problem