Django Queryset Caching with Redis optimization guide as Expected with Complex Queries
I'm trying to implement caching for complex queryset results in my Django application using Redis, but I'm running into issues where the cached results are not being returned as expected. I'm using Django 3.2 and `django-redis` version 4.12.0 for caching. My view function looks something like this: ```python from django.core.cache import cache from myapp.models import MyModel def expensive_query_view(request): cache_key = 'expensive_query_results' results = cache.get(cache_key) if results is None: results = MyModel.objects.filter(is_active=True).annotate(total=Count('related_model')) cache.set(cache_key, results, timeout=60 * 15) # Cache for 15 minutes return render(request, 'results.html', {'results': results}) ``` Despite caching, every time I hit this endpoint, the query seems to run anew instead of pulling from the cache. I checked Redis using `redis-cli` and can see that the cache key is being created, but when I check the contents, it appears empty. I also tried changing the cache timeout and adding a cache miss log: ```python if results is None: print('Cache miss!') ``` I see the cache miss log every time, which suggests that the results are not being cached at all. Additionally, I suspect it could be due to the queryset being a complex one and not easily serializable. When I try to cache the results directly like this: ```python results = list(MyModel.objects.filter(is_active=True).annotate(total=Count('related_model'))) ``` I still encounter the same scenario. I'm unsure if I need to serialize the queryset in a specific way before caching or if there’s something else I may be overlooking. Any guidance on how to resolve this would be greatly appreciated.