如何在不删除现有对象的情况下将模型管理器添加到Django模型？

Question

the question is pretty explanatory I believe. I want to add 2 new managers to a django model. However, if I add these two managers, the objects I currently have in my database are deleted. Is there any way to get around this? Or do I need to simply remake all the objects again?

Answer 1

Don't worry about it. When you add a new manager, it's a class that extends from models.Manager so, this new class already has all the manager's default methods.

Remember you can create a custom manager by doing:

class MyManager(models.Manager):

    ...

And the add to your models class

class MyModel(models.Model):

    ...
    objects = MyManager()

As you can see, MyManager class extends from models.Manager . You can see docs here