如何覆盖父类中的字段 [英] How to override a field in the parent class

问题描述

我在Django模型中有父类和子类。我想在初始化子类时在父类中填充一个字段。或在子类中覆盖此字段。

I have parent and child classes in Django model. And I want to fill a field in parent class when initialize child class. Or override this field in child class.

    class Parent(models.Model):
        type = models.CharField()

    class Child(Parent):
        type = models.CharField()  //Doesn't work

也尝试重写init方法，但它不工作。

Also trying override init method, but it doesn't work too. How can I accomplish this?

推荐答案

在正常的Python类继承中，允许子类重写父类的任何属性。在Django中，对于属于字段实例的属性（至少，目前不允许），不允许这样做。如果基类有一个名为author的字段，则不能在从该基类继承的任何类中创建另一个名为author的模型字段。

In normal Python class inheritance, it is permissible for a child class to override any attribute from the parent class. In Django, this is not permitted for attributes that are Field instances (at least, not at the moment). If a base class has a field called author, you cannot create another model field called author in any class that inherits from that base class.

你不能。 参考

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