django - 设置 django 相关模型集并删除集合中不再存在的模型

Question

在 Django 文档中，它提到当您直接指定新的相关集合时，不再在集合中的任何模型都只是解除关联而不是删除。

换句话说，如果你有这样的情况：

#author.books contains [book1, book2, book3]
author.books = [book1, book2]
author.save()

book 3 模型不再与作者关联，但并未删除。有没有办法解除和删除模型？

Answer 1

If book3 is an model object, you would just run

book3.delete()

And it will disassociate it from the Author's books (if that is a Key or many-to-many key for example) because it is deleted. And the record is also deleted from the Book model.