django model to dict (with related model)

m2d.py

from django.forms.models import model_to_dict

authors = []
for author in Author.objects.prefetch_related("books"):
    books = [model_to_dict(book, ["name", "price"]) for book in author.books.all()]
    author = model_to_dict(author, ["name", "age"])
    author["books"] = books
    authors.append(author)
    
# json.dumps(authors)