Django Model Manager Not Returning Expected QuerySet When Using Q Objects for Complex Queries
I'm trying to debug I'm deploying to production and I've searched everywhere and can't find a clear answer... I tried several approaches but none seem to work. I'm working with an scenario with a Django model manager that doesn't seem to return the expected `QuerySet` when I'm trying to filter using `Q` objects for complex queries. I'm using Django 3.2.8, and I have a model called `Product` that includes fields like `category`, `price`, and `is_active`. My goal is to retrieve all active products that belong to specific categories or have prices above a certain threshold. Here’s the model definition: ```python from django.db import models class Product(models.Model): category = models.CharField(max_length=100) price = models.DecimalField(max_digits=10, decimal_places=2) is_active = models.BooleanField(default=True) ``` I wrote a custom manager method to perform this query: ```python from django.db.models import Q class ProductManager(models.Manager): def active_in_categories_or_above_price(self, categories, min_price): return self.filter( Q(category__in=categories) | Q(price__gt=min_price), is_active=True ) ``` However, when I call this method: ```python active_products = Product.objects.active_in_categories_or_above_price(['Electronics', 'Clothing'], 50.00) ``` I expected to retrieve all active products in the 'Electronics' and 'Clothing' categories or those with a price greater than $50.00. Instead, it seems to return an empty `QuerySet`, and I am not seeing any errors in the console. I've verified that there are indeed active products that meet these criteria in the database. To troubleshoot, I tried running the equivalent SQL query directly in the database, which works fine. I also double-checked that the `categories` list is not empty and the `min_price` is set correctly. I even added some debug print statements in the manager method to check the generated SQL: ```python from django.db import connection print(connection.queries[-1]) # prints the last executed query ``` Still, the output doesn't seem to reflect the conditions I applied. What could be causing this discrepancy in the query results? Are there any common pitfalls with using `Q` objects in Django that I should be aware of? I'm working on a CLI tool that needs to handle this. Any ideas what could be causing this? I'm working on a service that needs to handle this. I'm working on a CLI tool that needs to handle this. What's the best practice here? Am I missing something obvious?