我似乎用一种相当圆滑的方式解决了这个问题。我会在这里发布它,以防其他人遇到类似的问题。
首先,我必须将存储后端设置为使用会话,而不是默认设置。我认为默认是会话,但从检查数据库,我没有看到它。
# settings.py
MESSAGE_STORAGE = 'django.contrib.messages.storage.session.SessionStorage'
接下来,我添加了一个处理程序的user.is_logged_in信号:
def kick_my_other_sessions(sender, request=None, user=None, **kwargs):
from django.contrib.messages import constants
from django.contrib.messages.storage.base import Message
from django.contrib.sessions.backends.db import SessionStore
from django.contrib.sessions.models import Session
from tracking.models import Visitor
keys = [v.session_key for v in Visitor.objects.filter(user=request.user).exclude(session_key=request.session.session_key)]
for session in Session.objects.filter(session_key__in=keys):
s = SessionStore(session.session_key)
# Hack to log the user out without expiring the session immediately,
# otherwise they'll never see their message
s["_auth_user_id"] = 0
# The _messages property is a list of Message objects
s["_messages"] = [Message(constants.ERROR, "You've been logged out because someone else has logged into your account from another computer.")]
s.save()
就是这样。最初,我刚刚删除了会话,但是这种(诚然是hackish)的方式,我可以注销用户并让他们保留会话,以便他们可以看到他们的消息。