Django Model Manager Returning Unexpected Query Results with Custom `get_queryset` Method
I'm collaborating on a project where I've spent hours debugging this and Quick question that's been bugging me - I've tried everything I can think of but I'm working with an scenario with a custom model manager in Django that returns unexpected results... I have a `Book` model with a custom manager that filters books based on their publication year. The expected behavior is to return only the books published in the specified year, but instead, I'm getting an empty queryset even when I know there are matching records. Here’s the code for my model and custom manager: ```python from django.db import models class BookManager(models.Manager): def published_in_year(self, year): return self.get_queryset().filter(publication_year=year) class Book(models.Model): title = models.CharField(max_length=200) publication_year = models.IntegerField() objects = BookManager() ``` I used the manager in my view like this: ```python from django.shortcuts import render from .models import Book def book_list(request, year): books = Book.objects.published_in_year(year) return render(request, 'books/book_list.html', {'books': books}) ``` When I call `book_list(request, 2020)`, it returns an empty list, even though I have entries for 2020 in the database. I've verified that the database contains records where `publication_year` is indeed 2020. I've also checked for typos in the field name and ensured I'm passing the correct year as an integer. Could there be something wrong with how the queryset is executed, or is there another aspect of the Django ORM that I might be missing? Any insights would be appreciated! Any pointers in the right direction? The project is a REST API built with Python. I'd really appreciate any guidance on this. I'm working in a Linux environment. I'd really appreciate any guidance on this.