Django 表单提交简单运用

在表单提交中会出现 CSRF 验证，先在 settings.py 将验证关闭。

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    # 'django.middleware.csrf.CsrfViewMiddleware', # 先关闭 CSRF 验证，提交就可以通过了
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

html文件

<form action="/add_book/" accept-charset="utf-8" method="post">
    书名：<input type="text" name="booktitle"/> <Br/><br/>
    出版社：<select name="publisher" id="">
                {% for publisherItem in publishers %}
                <option value="{{ publisherItem.name }}">{{ publisherItem.name }}</option>
                {% endfor %}
            </select><br/><br/>
    <input type="submit" value="提交"/>
</form>

 views.py文件

# 向数据库添加数据
def add_book(request):
    if request.method == 'POST':
        # request.POST.get(表单name属性的值) request.GET.get(url的key)
        bookTitle = request.POST.get('booktitle',None) # 没有数据返回 None
        publisherId = request.POST.get('publisher',None)
        if bookTitle :
            # 创建一条新的数据
            newbook = models.Book.objects.create(title = bookTitle,publisher_id=publisherId)
            newbook.save() # 把新创建的数据写入数据库中
            return redirect('/book_list/')
    # 获取到全部的出版社信息
    publishers = models.Publisher.objects.all() 
    return render(request,'add_book.html',{'publishers':publishers})

# 删除一条数据库数据
def delete_book(request):
    # 利用 GET 获取到指定的值
    bookId = request.GET.get('id',None)
    if bookId:
        book_item = models.Book.objects.get(id = bookId) # 通过 GET 获取到ID值进行数据查询
        book_item.delete() # 删除数据
    return redirect('/book_list/')