Django Channels：有人可以提供一个非常简单的数据绑定工作示例吗？

Question

我正在学习如何在我的网站中实现 Django 频道，但我无法理解文档 (http://channels.readthedocs.io/en/latest/binding.html)。互联网上的例子并不多。有人可以为我提供一个有效的数据绑定源代码并附上不错的评论吗？

Answer 1

对于 django 频道 1 - https://bitbucket.org/voron-raven/chat/src/aec8536dba2cc5f0faa42305dcd7a49d330a8b54/core/models.py?at=master&fileviewer=file-view-default#models.py-242 这是一个带有聊天机器人的简单聊天网站 - http://chat.mkeda.me

数据绑定示例：

class MessageBinding(WebsocketBinding):
    model = Message
    stream = 'messages'
    fields = ['__all__']

    @classmethod
    def group_names(cls, instance):
        """
        Returns the iterable of group names to send the object to based on the
        instance and action performed on it.
        """
        return ['thread-{}'.format(instance.thread.pk)]

    def has_permission(self, user, action, pk):
        """
        Return True if the user can do action to the pk, False if not.
        User may be AnonymousUser if no auth hooked up/they're not logged in.
        Action is one of "create", "delete", "update".
        """
        if action == 'create':
            return True

        return user.is_superuser

在 django-channels 中删除了 2 绑定 - http://channels.readthedocs.io/en/latest/one-to-two.html?highlight=binding#removed-components 您可以使用信号向您的群组发送更新。