👀 Views: 201 💬 Answers: 1 📅 Created: 2025-06-01

Flask Flask-Caching Redis Cache Python

I'm working with a strange scenario while using Flask-Caching with a Redis backend in my Flask application, running on Flask 2.1.0. I have configured caching for a specific route that fetches user data from the database. The cache works correctly for the first request but seems to return stale data on subsequent requests, even though my cache timeout is set. Here's the relevant portion of my code: ```python from flask import Flask, jsonify from flask_caching import Cache app = Flask(__name__) app.config['CACHE_TYPE'] = 'Redis' app.config['CACHE_KEY_PREFIX'] = 'myapp' app.config['CACHE_DEFAULT_TIMEOUT'] = 300 # 5 minutes cache = Cache(app) # Simulated database function def get_user_data(user_id): # Simulate a database call return {'user_id': user_id, 'name': 'User ' + str(user_id)} @app.route('/user/<int:user_id>') @cache.cached(timeout=300) def user(user_id): return jsonify(get_user_data(user_id)) ``` When I make a request to `/user/1`, it returns the expected data. However, if I change the data in the database and make the request again, I still get the old data from the cache instead of the updated data. I've tried clearing the cache manually using `cache.clear()` before the route returns, but that didn't seem to help either. I also ensured that the Redis server is running and configured correctly. Am I missing something in the cache configuration or is there a known scenario with Flask-Caching and Redis? Any help would be appreciated!