Django 工作流程从一个视图重定向到另一个视图并显示带有 url 参数的页面

Question

我正在尝试创建一个网络应用程序，用户将选择一个文件，处理数据，然后重定向到带有 url 参数的确认页面（？status=1）我如何从处理视图移动到确认视图然后显示确认页面？
我把我的代码放在下面，在我的视图和 urls py 文件中不起作用

# views.py
def marketdata_processing(request):
    if request.method == 'POST':
        uploadform = forms.MyUploadForm(request.POST, request.FILES)
        if uploadform.is_valid():
            newdoc = models.UploadDocument(docfile=request.FILES['uploadfile'])
            filename = request.FILES['uploadfile'].name
            newdoc.save()
            selecteddate = newdoc.getselecteddate()  # Model method calculated
            fileid = newdoc.pk
            request.session['fileid'] = fileid
            request.session['selecteddate'] = selecteddate
            return redirect(reverse('views.confirm_input_details'))
    else:
        uploadform = forms.MyUploadForm()
   # Render list page with the documents and the form
    return render_to_response(
        'mytemplate.html',
        {'uploadform': uploadform},
        context_instance=RequestContext(request)
    )


def confirm_input_details(request):
    fileid = request.session['fileid']
    selecteddate = request.session['selecteddate']
    msg = 'Proceed to import data for %s? \nFileID Being Imported is %s ' % (
        selecteddate, fileid,)
    url = reverse('views.confirm_input_details', kwargs={'status': 1})
    return HttpResponseRedirect(url)

# urls.py
urlpatterns = [
    url(r'', views.marketdata_processing, name='myapp/mytemplate.html'),
    url(r'^\?status=(?P<status>[0-9]+)$',
        views.confirm_input_details, name='myapp/myconfirmpage.html'),
]

Answer 1

我觉得您的代码中存在几个问题：

• 缩进是python代码中非常重要的事情。请确保“marketdata_processing”视图中 if-else 语句的缩进顺序正确。请注意，在您的代码中：

  return render_to_response('mytemplate.html',
                           {'uploadform': uploadform},
                           context_instance=RequestContext(request)) 
  

  总是会被执行，因为它在 else 语句之外。你可能想在 else 下缩进（如果有意义的话）——像这样：

  else:
      uploadform = forms.MyUploadForm()
      return render_to_response('mytemplate.html',
                               {'uploadform': uploadform},
                               context_instance=RequestContext(request))
  

• 而不是 'redirect(reverse())' 在处理视图中尝试 'HttpResponseRedirect()' 来调用确认页面视图，如下所示：

  from django.http import HttpResponseRedirect
  
  return HttpResponseRedirect('/?status=1')       --> relative URL shown
  

  将相对/绝对网址（两者都可以）放在上面。

• 最后，使用上下文参数在“confirm_input_details”视图中呈现您的确认页面模板，如下所示：

     def confirm_input_details(request):
         fileid = request.session['fileid']
         selecteddate = request.session['selecteddate']
         msg = 'Proceed to import data for %s? \nFileID Being Imported is %s ' % (selecteddate, fileid)
  
         return render_to_response('confirmpage_template.html'),
                                  {'fileid': fileid,
                                   'selecteddate': selecteddate,
                                   'msg': msg}, context_instance=RequestContext(request)) 
  

** PS：坚持简洁的基础知识，它会起作用。您碰巧从同一视图本身中调用了您的 confirm_input_details 视图。据我所知，这可能会让你陷入无限循环。任何视图的简单概念是：

    take input:request, parameters 
     --> process logic with parameters 
      --> render a specific template or call another url where a template is being rendered. 

如果没有渲染模板，您不能期望页面显示出来。