See the following set of models:
class Mom(models.Model):
name = models.CharField(max_length=80)
def __unicode__(self):
return self.name
class Dad(models.Model):
name = models.CharField(max_length=80)
def __unicode__(self):
return self.name
class Child(models.Model):
name = models.CharField(blank=True, max_length=100)
mom = models.ForeignKey(Mom)
dad = models.ForeignKey(Dad, null=True, blank=True)
def __unicode__(self):
return self.name
In admin if you create a Child with a Mom and a Dad, and then attempt
to delete the Mom, it works as expected (prompt to make sure you're
okay deleting the children, click okay, Mom and Child objects are
deleted). However, if you attempt to delete the, Dad, you'll get a
prompt asking if it's okay to delete the Child but upon clicking Okay,
you get an integrity error.
I'm using MySQL and innoDB. Here's a link to the traceback:
http://dpaste.com/83431/
Is this a bug I'm seeing or am I missing something in either my models
or configuration? Or do I not understand how ForeignKeys where
null=True are supposed to work?
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