如何解除外鍵相關關系的綁定？

Question

如何刪除外鍵？

我有兩個模型：

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? 

我想取消綁定該子項，這意味着我要將特殊的Parent關聯Child實例的父字段設為None 。

Answer 1

嘗試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)