Question

Helllo大家，我没有解决方案来获取拥有Django内容对象的用户。所以我发帖给你们帮忙！

我正在构建2个模型：反应和通知。如果用户React，将自动创建一个对象Notification。这是我的代码：模型反应：

class Reaction(models.Model):
    user = models.ForeignKey(User)
    react_type = models.CharField(max_length=100, choices=REACT_TYPES, default='NO')
    timestamp = models.DateTimeField(auto_now_add=True, null=True)
    content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE, null=True)
    object_id = models.PositiveIntegerField(null=True)
    content_object = GenericForeignKey('content_type', 'object_id')

    def save(self, force_insert=False, force_update=False, *args, **kwargs):
       Notification(from_user = self.user, to_user = ???, notification_type = Notification.LIKED, target_content_type = self.content_type, target_object_id = self.object_id).save()
       super(Reaction, self).save(*args, **kwargs)

模型通知

class Notification(models.Model):    
    from_user = models.ForeignKey(User, related_name='from_user_noti')
    to_user = models.ForeignKey(User, related_name='to_user_noti')
    date = models.DateTimeField(auto_now_add=True, null=True)
    is_read = models.BooleanField(default=False)
    target_content_type = models.ForeignKey(ContentType, related_name='notify_target', blank=True, null=True)
    target_object_id = models.PositiveIntegerField(null=True)
    target = GenericForeignKey('target_content_type', 'target_object_id')

如您所见，我对获取to_user字段有疑问。这个字段我想得到拥有Django内容对象的用户示例：发布，评论，... 请帮我处理这个案子！

Answer 1

假设content_object具有用户关系，可以尝试这个：

class Reaction(models.Model):
    user = models.ForeignKey(User)
    react_type = models.CharField(max_length=100, choices=REACT_TYPES, default='NO')
    timestamp = models.DateTimeField(auto_now_add=True, null=True)
    content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE, null=True)
    object_id = models.PositiveIntegerField(null=True)
    content_object = GenericForeignKey('content_type', 'object_id')

    def save(self, force_insert=False, force_update=False, *args, **kwargs):
       super(Reaction, self).save(*args, **kwargs)
       Notification(from_user = self.user, to_user = self.content_object.user, notification_type = Notification.LIKED, target_content_type = self.content_type, target_object_id = self.object_id).save()

Django：ContentType对象访问，从content_object获取用户

1 个答案: