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python - 'SessionStore' 对象没有属性 'GET'

问题描述

这段代码有什么问题，它会产生以下错误：

>   'SessionStore' object has no attribute 'GET'

这是代码：

def blog_detail(request, blog_slug):
    blog = get_object_or_404(Blog, slug=blog_slug)
    session_key = 'blog_views_{}'.format(blog.slug)
    if not request.session.GET.get('session_key', False)
        blog.blog_views += 1
        blog.save()
        request.session['session_key'] = True

    return render(request, 'blogs/blog-detail.html', {'blog':blog})

我认为我使用request.session. 你能帮我吗，谢谢。

编辑：追溯

Environment:


Request Method: GET
Request URL: http://localhost:8000/dramatically-productivate-global-functionalities-whereas-reliable-internal-or-organic-sources

Django Version: 2.2.1
Python Version: 3.7.2
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'blogs',
 'users',
 'crispy_forms']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']



Traceback:

File "E:\Practice\new-blog\lib\site-packages\django\core\handlers\exception.py" in inner
  34.             response = get_response(request)

File "E:\Practice\new-blog\lib\site-packages\django\core\handlers\base.py" in _get_response
  115.                 response = self.process_exception_by_middleware(e, request)

File "E:\Practice\new-blog\lib\site-packages\django\core\handlers\base.py" in _get_response
  113.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "E:\Practice\new-blog\src\blogs\views.py" in blog_detail
  53.     if not request.session.GET.get('session_key', False):

Exception Type: AttributeError at /dramatically-productivate-global-functionalities-whereas-reliable-internal-or-organic-sources
Exception Value: 'SessionStore' object has no attribute 'GET'

标签： pythondjango

解决方案

这里有两个错误：

  • 您不能使用request.session.GET.get(..)，因为SessionBase对象没有 GET属性；和
  • 您使用了字符串文字 'session_key'而不是标识符。

你可能想写：

def blog_detail(request, blog_slug):
    blog = get_object_or_404(Blog, slug=blog_slug)
    session_key = 'blog_views_{}'.format(blog.slug)
    if not request.session.get(session_key, False):
        blog.blog_views += 1
        blog.save()
        request.session[session_key] = True

    return render(request, 'blogs/blog-detail.html', {'blog':blog})

我们可以使if语句更短一些，因为.get(..)默认情况下返回None也具有真实性False：

def blog_detail(request, blog_slug):
    blog = get_object_or_404(Blog, slug=blog_slug)
    session_key = 'blog_views_{}'.format(blog.slug)
    if not request.session.get(session_key):
        blog.blog_views += 1
        blog.save()
        request.session[session_key] = True

    return render(request, 'blogs/blog-detail.html', {'blog':blog})

所以这里我们使用request.session.get(..)并使用session_key标识符，而不是文字。如果我们要使用'session_key'，我们只需询问会话是否有密钥'session_key'，而不是'blog_views_some-title'.

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