Django中使用默认查询集的动态过滤

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

    objects = models.Manager()  # 默认查询集

from django.shortcuts import render
from .models import Book

def filter_books(request):
    title = request.GET.get('title')  # 获取用户输入的书名
    author = request.GET.get('author')  # 获取用户输入的作者名

    books = Book.objects.all()  # 获取所有书籍

    if title:
        books = books.filter(title__icontains=title)  # 根据书名过滤

    if author:
        books = books.filter(author__icontains=author)  # 根据作者名过滤

    return render(request, 'books.html', {'books': books})