def METHOD_NAME(self, source, mapped, Model):
    for field in Model._meta.fields:
        column = field.column
        if hasattr(source, column):
            if Model in self.overrides and column in self.overrides[Model]:
                self.assertEqual(self.overrides[Model][column], getattr(mapped, column))
            else:
                self.assertEqual(getattr(source, column), getattr(mapped, column))