👀 Views: 57 💬 Answers: 1 📅 Created: 2025-06-05

django queryset filtering Python

This might be a silly question, but I'm attempting to set up I'm following best practices but I'm working on a personal project and I've been struggling with this for a few days now and could really use some help... I'm working with unexpected behavior with Django's QuerySet caching. After applying a filter on a QuerySet, the results are not what I expect. Here's the situation: I have a model `Product` with fields `name` and `price`. When I filter the products based on price, I sometimes get stale data that doesn't match the expected filter results. For example, if I filter for products with a price less than 100, I occasionally see products priced above 100 in the result set. I've tried using the `distinct()` method, but it hasn't resolved the scenario. My code looks like this: ```python from myapp.models import Product # Initial QuerySet products = Product.objects.all() # Filtering products filtered_products = products.filter(price__lt=100).distinct() for product in filtered_products: print(product.name, product.price) ``` Additionally, I've confirmed that there are no products with a price of 100 or above in the database during my tests. I also checked if there are any signals or middleware that might be affecting the QuerySet after filtering, but I couldn't find anything. I’m using Django 3.2.8 and PostgreSQL as my database backend. Has anyone else experienced this scenario or have any suggestions on how to ensure I get fresh data from the database after filtering? Any insights or debugging tips would be appreciated! For context: I'm using Python on Ubuntu. Has anyone else encountered this? My development environment is Windows. Has anyone else encountered this? Thanks in advance! Am I approaching this the right way? Am I approaching this the right way?