如何在django视图中调用model方法？

from django.db import models

class Book(models.Model):
    title = models.CharField(max_length=100)
    author = models.CharField(max_length=100)

    def get_author_name(self):
        return self.author

from django.shortcuts import render
from .models import Book

def book_detail(request, book_id):
    book = Book.objects.get(id=book_id)
    author_name = book.get_author_name()
    return render(request, 'book_detail.html', {'author_name': author_name})

<h1>Book Details</h1>
<p>Author: {{ author_name }}</p>