如何在多对多字段django中获取最新id

# 假设有两个模型，一个是Book，一个是Author，它们之间是多对多关系
class Book(models.Model):
    title = models.CharField(max_length=100)
    authors = models.ManyToManyField(Author)

class Author(models.Model):
    name = models.CharField(max_length=100)

# 获取最新的id
latest_id = None

# 获取Book模型的最新id
latest_book = Book.objects.order_by('-id').first()
if latest_book:
    latest_id = latest_book.id

# 输出最新id
print(latest_id)