Django 4.1 - implementing Bulk Update Using F Expressions on Related Fields
I've looked through the documentation and I'm still confused about I'm sure I'm missing something obvious here, but I'm attempting to set up I'm writing unit tests and I'm trying to figure out I'm currently working with an scenario with performing bulk updates on a related model using Django 4.1... I have two models, `Author` and `Book`, where each `Book` has a ForeignKey to an `Author`. I’m trying to update the `published_year` of multiple `Book` instances in a single query based on the `Author`'s `name`. My goal is to update all books by a specific author to a new published year, but it seems that the update isn't reflecting in the database. Here’s the relevant part of my code: ```python from django.db.models import F from myapp.models import Author, Book def update_books(author_name, new_year): Author.objects.filter(name=author_name).update(book__published_year=new_year) ``` When I run the `update_books` function, I get the following behavior: ``` FieldError: want to resolve keyword 'book' into field. Choices are: id, name, ... (other fields) ``` I’ve tried to directly use `Book.objects.filter(author__name=author_name).update(published_year=new_year)`, which works fine, but I want to utilize a bulk update for performance reasons since I expect a large dataset. I also considered using `F` expressions but couldn't find a proper way to apply them in this context. Is there a way to achieve this bulk update directly using the related field without running into the `FieldError`? Any insights or best practices for handling this specific scenario would be greatly appreciated. My development environment is Linux. What's the best practice here? For reference, this is a production application. Is there a simpler solution I'm overlooking?