👀 Views: 33 💬 Answers: 1 📅 Created: 2025-09-06

flask redis session-management Python

I'm a bit lost with I'm trying to implement I'm relatively new to this, so bear with me... I'm sure I'm missing something obvious here, but I tried several approaches but none seem to work... While developing a web application using Flask 2.x, I aim to enhance user experience by managing session state efficiently. I’m utilizing Redis as the session backend, but I’ve encountered inconsistent session persistence. Sometimes, users seem to lose their session state unexpectedly, especially during high-load scenarios. Here is a snippet of how I set up the session management in my Flask app: ```python from flask import Flask, session from flask_session import Session import redis app = Flask(__name__) app.config['SESSION_TYPE'] = 'redis' app.config['SESSION_PERMANENT'] = False app.config['SESSION_USE_SIGNER'] = True app.config['SESSION_KEY_PREFIX'] = 'myapp:' app.config['SESSION_REDIS'] = redis.StrictRedis(host='localhost', port=6379, db=0) Session(app) ``` The issue arises particularly when multiple tabs are opened by the same user. The first tab maintains its session, but subsequent tabs occasionally produce the following error in the console: ``` TypeError: 'NoneType' object is not subscriptable ``` I’ve tried setting `SESSION_PERMANENT` to True, but that didn’t solve the problem. Additionally, I’ve confirmed that the Redis server is running smoothly and is capable of handling multiple connections. I’m also using Flask-CORS to manage cross-origin requests, and I wonder if that might be conflicting somehow with session handling. If I disable CORS, the session behavior seems more stable, but that’s not a viable solution for my app. Does anyone have insights into how to ensure session state is consistently managed across multiple tabs while utilizing Flask and Redis? Any suggestions for debugging this issue would be greatly appreciated. Any ideas what could be causing this? This is part of a larger application I'm building. Any help would be greatly appreciated! This is part of a larger web app I'm building. Is there a better approach? Thanks for taking the time to read this!