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How to implement guide with custom django model manager returning incorrect queryset type

👀 Views: 2 đŸ’Ŧ Answers: 1 📅 Created: 2025-05-31
django queryset custom-manager Python

I'm getting frustrated with I'm not sure how to approach I'm getting frustrated with I'm relatively new to this, so bear with me..... I'm working with an scenario with a custom model manager in Django that's returning the wrong type of QuerySet. I have a model `Book` with a custom manager `PublishedBooksManager` that should only return books published after a certain date. However, when I call this manager's method, it appears to return a list instead of a `QuerySet`, which is causing a type behavior later in my code. Here's the code for the model and manager: ```python from django.db import models class PublishedBooksManager(models.Manager): def published_after(self, date): return self.filter(publish_date__gt=date) class Book(models.Model): title = models.CharField(max_length=255) publish_date = models.DateField() objects = models.Manager() # The default manager published_books = PublishedBooksManager() # Custom manager ``` When I try to use the custom manager like this: ```python from datetime import date books = Book.published_books.published_after(date(2020, 1, 1)) print(type(books)) # Expected: <class 'django.db.models.query.QuerySet'> ``` Instead, I get: ``` <class 'list'> ``` I've tried checking if the method is accidentally returning a list by adding `list()` at various points, but the scenario continues. I also confirmed that I have not overridden any other methods that might affect the return type. Could it be that I need to use `get_queryset()` in my manager or is there something else I may have overlooked? I'm using Django 3.2.5. Any help would be appreciated! This is part of a larger CLI tool I'm building. Am I missing something obvious? This is my first time working with Python LTS. Hoping someone can shed some light on this. Any examples would be super helpful. I'm using Python 3.9 in this project. Is there a simpler solution I'm overlooking?