在django中为会话预过滤查询

from django.utils.cache import patch_vary_headers
from django.shortcuts import redirect

class SessionPreFilterMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        # 示例：只加载当前用户的会话数据
        if request.user.is_authenticated:
            request.session = request.session.filter(user=request.user)
        
        response = self.get_response(request)
        patch_vary_headers(response, ['Cookie'])
        return response

from django.contrib.sessions.models import Session
from django.db import models

class CustomSessionManager(models.Manager):
    def get_queryset(self):
        qs = super().get_queryset()
        if hasattr(self.model, 'user') and self.model.user.is_authenticated:
            qs = qs.filter(user=self.model.user)
        return qs

class CustomSession(Session):
    objects = CustomSessionManager()

    class Meta:
        proxy = True