添加和编辑两个视图函数只写了get请求渲染的页面。提交数据是post请求，所以要修改view.py。

book_add.py

1 def book_add(request): 2     if request.method == "POST": 3         title = request.POST.get('title') 4         price = request.POST.get('price') 5         pub_date = request.POST.get('pub_date') 6         publish_id = request.POST.get('pubs') 7         author_id_list = request.POST.getlist('authors')  # 多选用getlist取 8         book_obj = Book.objects.create(title=title, price=price, pub_date=pub_date, publish_id=publish_id) 9         book_obj.author.add(*author_id_list)10         return redirect('index')11 12     pub_lt = Publish.objects.all()13     author_lt = Author.objects.all()14     return render(request, 'book_add.html', {
   "pub_list": pub_lt, "author_list": author_lt})

说明：

• 增加了post请求分支，如果是post请求，就走post里面的代码
• 获取前端form传来的数据，request.POST.get()，因为author是多选，有多个值所以用getlist
• 在数据库中创建一条书籍记录。绑定多对多关系，book_obj.author.add(*author_id_list)
• 重定向到inex页面。因为添加了别名，所以可以这样使用

book_edit.py

1 def book_edit(request, book_id): 2     book = Book.objects.filter(pk=book_id).first() 3     if request.method == "POST": 4         title = request.POST.get('title') 5         price = request.POST.get('price') 6         pub_date = request.POST.get('pub_date') 7         publish_id = request.POST.get('pubs') 8         Book.objects.filter(pk=book_id).update(title=title, price=price, pub_date=pub_date, publish_id=publish_id) 9         author_id_list = request.POST.getlist('authors')  # 多选用getlist取10         11         # 多对多更新12         book.author.set(author_id_list)13         return redirect('index')14     pub_lt = Publish.objects.all()15     authors = Author.objects.all()16 17     return render(request, 'book_edit.html', {
   "book": book, "pub_list": pub_lt, "author_list": authors})

说明：

• 基本和添加的逻辑一样，只是入库的时候不一样。

更改完，我们的添加和编辑就能生效了。但是代码一样的多啊，，，好多重复的，还有更高级的用法：

你看看就行了，这有就入库了。

 

1 def book_add(request): 2     if request.method == 'POST': 3         form = BookForm(request.POST) 4         if form.is_valid(): 5             form.save() 6             return redirect('/books/') 7     form = BookForm() 8     return render(request, 'book_add.html', locals()) 9 10 11 def book_edit(request, edit_book_id):12     book_obj = Book.objects.filter(pk=edit_book_id).first()13     if request.method == 'POST':14         form = BookForm(request.POST, instance=book_obj)15         if form.is_valid():16             form.save()17             return redirect('/books/')18     form = BookForm(instance=book_obj)19     return render(request, 'book_edit.html', locals())