如何解绑外键相关关系？

Question

如何删除外键？我有两个模型：class Child(models.Model):    name = models.CharField(max_length=256, null=True, blank=True)    parent = models.ForeignKey(to=Parent, null=True, related_name="children", on_delete=models.DO_NOTHING)class Parent(models.Model):    name = models.CharField(max_length=256, null=True, blank=True)    def unbind_children(self):  # there I want to unbind all children        # how to realize this? 我想解除孩子的绑定，我的意思是我想让特殊的 Parent 相关Child实例的 parent 字段为None.

Answer 1

尝试 self.children.update(parent=None)

class Parent(models.Model):

    name = models.CharField(max_length=256, null=True, blank=True)

    def unbind_child(self):

        self.children.update(parent=None)