render_to_response 或重定向更改 Django 1.8 中的模板元素 [英] render_to_response or redirect changes the template elements in Django 1.8

问题描述

我正在尝试检查用户输入的电子邮件 ID 是否存在于数据库表中，如果存在 - 我想路由到prof.html"模板，否则只在 login.html 模板中显示一条消息.

I'm trying to check if email id entered by user is existing in the database table, if existing - I would like to route to 'prof.html' template otherwise just show a message in the login.html template.

两个条件都工作正常.

然而，问题是当我使用 redirect() 或 render_to_response() 时 -目标模板元素，如 div、input 等，正在自动更改(在本例中为 prof.html)?

However, the problem is when I use redirect() or render_to_response() - the destination template elements like div, input etc., are being changed automatically (prof.html in this case) ?

我们是否也可以将上下文信息发送到目标模板?(在这种情况下，响应数据或来自数据库的任何对象并通过视图重定向到 prof.html 模板)

Can we also send the context information to destination template ? (response data or any object from the database and redirect to prof.html template via view in this case)

下面是我的代码:

Views.py

def verifyme(request):
    if request.method == "POST":
        emailid4loginV = request.POST['emailid4login_Aj']
    else:
        emailid4loginV = '' 
        response_data = ''
        return HttpResponse(response_data, content_type="text/plain")
    response_data = ''
    if Employee.objects.filter(email = emailid4loginV).exists():
        response_data='Thanks for waiting - login successful'
        #return render_to_response('app/prof.html', { 'response_data':response_data}, 
        #                           context_instance = RequestContext( request ) )
        return redirect('/myprofile')
    else:
        response_data='Ouch! you are not a registered user!'
    return HttpResponse(response_data, content_type="text/plain")

urls.py

url(r'^myprofile$', 'app.views.profile', name='profile'),

仅供参考，个人资料"视图确实会从表中返回一些对象并在模板 app/prof.html 中呈现.

Just for your info, 'profile' view does return some objects from the table and renders in the template app/prof.html.

我观察到目标模板在同一个 login.html 模板中呈现(如何?:在浏览器 url 中，我没有看到 myprofile - 但用于登录的那个)但是当我通过在网站中输入手动请求 myprofileurl (localhost:xxxxx/myprofile)，它完美运行:(

I observed that the destination template is being rendered in same login.html template (How ? : In the browser url, I dont see myprofile - but the one for login) But when I request the myprofile manually by entering in the website url (localhost:xxxxx/myprofile), it works perfectly :(

在 login.html 中提交请求之前的 URL :

URL before submitting request in login.html :

在 login.html 中提交请求后的 URL - myprofile 在同一页面中呈现:

URL after submitting request in login.html - myprofile is rendered in the same page :

当我手动输入 url 时，模板完美运行..

When I manually type in the url, template just works perfectly..

你能告诉我可能是什么问题吗?

Could you please let me know what could be the problem ?

用一个小技巧解决了这个问题，贴在下面

Solved this issue with a little trick, posted in the below

https://stackoverflow.com/questions/31091938/why-is-httpresponseredirectreverse-doesnt-redirect-to-new-page

推荐答案

1) 实际上有很多方法可以将数据传递到下一个视图...sessiontorage)，它就像剪贴板……在一个视图中保存会话数据，稍后在另一个视图中获取.例如:

1) Actually there are many ways to pass data to next view ... generally in such cases like you have better way - using sessions (cookie|localstorage|sessionstorage), it is like clipboard ... save session data in one view and get it later in another one. For example:

第一次观看:

self.request.session['response_data'] = 'some text'
self.request.session.set_expiry(0)  # user’s session cookie will expire when the user’s Web browser is closed.

其他观点:

response_data = self.request.session.get('response_data', '')

但是如果您打算只在模板中使用这些数据，Django 有一些更高级的接口，在您的情况下语义上正确使用它 - 消息框架 https://docs.djangoproject.com/en/1.8/ref/contrib/messages/

But if you planning just use this data in template Django has some kind more high-level interface for it and in your case semantically right to use it - The messages framework https://docs.djangoproject.com/en/1.8/ref/contrib/messages/

2) 如果你想重定向到另一个视图，最好使用 url 命名空间和 reverse https://docs.djangoproject.com/en/1.8/ref/urlresolvers/#reverse

2) If you want redirect to another view better use url namespaces and reverse https://docs.djangoproject.com/en/1.8/ref/urlresolvers/#reverse

return HttpResponseRedirect(reverse(app.views.profile))  # here I've passed callable object because you have not show your app url namespace, but generally use namespaces

https://docs.djangoproject.com/en/1.8/topics/http/urls/#url-namespaces

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