Does South handle model mixins?

问题:

I've created a mixin and inherited from it in some models. The problem is when I create a schema migration, the mixin's fields are there.

class MyMixin(object):
    a_field = models.CharField(max_length=30, blank=True)
    another_field = models.DateTimeField(blank=True, null=True)

    class Meta:
        abstract = True


class MyModel(models.Model, myMixin):
    ...

Any ideas?

回答1:

Seem to have got it working using the following

class MyMixin(models.Model):
    a_field = models.CharField(max_length=30, blank=True)
    another_field = models.DateTimeField(blank=True, null=True)

    class Meta:
        abstract = True


class MyModel(myMixin, models.Model):
    ...

The changes are:

• MyMixin inherits Model rather than object (despite many discussions around the place saying that mixins for django should inherit object rather than Model)
• the order of inheritance for MyModel - the mixin has to come first