Django logic deletes is_delete and triggers on_delete of associated foreign keys

class BaseModel(models.Model):
    is_delete = models.BooleanField(default=False, db_index=True)
    c_time = models.DateTimeField(auto_now_add=True, max_length=0)
    u_time = models.DateTimeField(auto_now=True, max_length=0)
    objects = NotDeletedManager()

    # 类中在定义一个类就代表是配置，约定俗成都叫Meta
    class Meta:
        # 基表必须设置abstract，基表就是给普通Model类继承使用的，设置了abstract就不会完成数据库迁移完成建表
        abstract = True

    def delete(self, using=None, keep_parents=False):
        """重写数据库删除方法实现逻辑删除"""
        # self.is_delete = True
        # self.save()
        print("-------------model-delete")
        using = using or router.db_for_write(self.__class__, instance=self)
        assert self.pk is not None, (
            "%s object can't be deleted because its %s attribute is set to None." %
            (self._meta.object_name, self._meta.pk.attname)
        )
        collector = Collector(using=using)
        collector.add_field_update(self._meta.get_field('is_delete'), True, [self])
        collector.collect([self], keep_parents=keep_parents)
        # 排除需要删除的instance 当前model,采用逻辑删除 同时执行外键的on_delete方法
        collector.data.pop(self.__class__)
        # print(collector.data)
        collector.delete()

Add the fields that need to be updated in the Collector, and delete the instance of the current model in the data

Foreign key information:

frame_id = models.ForeignKey(related_name="extend_frame_id_panel", to='BaseModel', to_field='id', on_delete=models.SET_NULL, db_constraint=False, db_column="frame_id", null=True, verbose_name="边框信息", help_text="边框信息")