Hello,
i need a mixin where i can inherit many to many like this:
mixin.py:
class RightsModelRelation(models.Model):
user_link = models.ForeignKey(User, on_delete=models.CASCADE,
blank=False, null=False, default=None,
related_name="%(class)s_rights_user")
right_to_view = models.BooleanField(default=True)
right_to_change = models.BooleanField(default=False)
right_to_delete = models.BooleanField(default=False)
class RightsModelMixin(models.Model):
owner = models.ForeignKey(User, on_delete=models.CASCADE, null=False,
default=None,
related_name="%(class)s_owner", )
rights_link = models.ManyToManyField(RightsModelRelation, default=None,
related_name="%(class)s_rights_link")
and in my normal model.py i want:
class Address(RightsModelMixin,models.Model):
lastname = models.CharField(max_length=255, default="", )
firstname = models.CharField(max_length=255, default="", blank=True,
null=True)
On migrations i get:
You are trying to add a non-nullable field 'rightsmodelmixin_ptr' to
address without a default; we can't do that (the database needs something
to populate existing rows).
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