def METHOD_NAME(self):
    field = fields.Field(
        column_name="name", attribute="name", saves_null_values=False
    )
    row = {
        "name": None,
    }
    field.save(self.obj, row)
    self.assertEqual(self.obj.name, "Foo")
    self.field.save(self.obj, row)
    self.assertIsNone(self.obj.name)