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from django.db import models
from django.test import SimpleTestCase
from django.test.utils import isolate_apps
@isolate_apps('invalid_models_tests')
class CustomFieldTest(SimpleTestCase):
def test_none_column(self):
class NoColumnField(models.AutoField):
def db_type(self, connection):
# None indicates not to create a column in the database.
return None
class Model(models.Model):
field = NoColumnField(primary_key=True, db_column="other_field")
other_field = models.IntegerField()
field = Model._meta.get_field('field')
errors = field.check()
self.assertEqual(errors, [])
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