Django:向Model Class Object添加其他属性

class MyModel(models.Model):
    field1 = models.CharField(max_length=100)
    field2 = models.IntegerField()

    @property
    def custom_attribute(self):
        return f"{self.field1} - {self.field2}"

class MyModel(models.Model):
    field1 = models.CharField(max_length=100)
    field2 = models.IntegerField()

    def __getattr__(self, name):
        if name == "custom_attribute":
            return f"{self.field1} - {self.field2}"
        raise AttributeError(f"'{self.__class__.__name__}' object has no attribute '{name}'")