无法将字典更新序列元素＃0转换为序列

Question

我试图存储表格字段变量Django cache，并在我的视图中添加了Django窗体。

我得到这个错误，我看不出有什么会是错误的，我的脚本：

Cannot convert dictionary update sequence element #0 to a sequence 

你有什么想法？从我的观点来看，所有这一切似乎都是对的

误差来源于此行：

return render(request, 'form.html', {'form' : form}) 

这是我的脚本功能：

def Function_Form(request) : 

    query_lastname = request.GET.get('lastname') 
    cache.set('query_lastname', query_lastname, 300) 
    print cache.get('query_lastname') 

    if request.method == 'POST': 

     form = Formulary(request.POST or None) 

     if form.is_valid() : 
      if '_save' in request.POST : 
       post = form.save() 
       return HttpResponseRedirect(reverse('treated', kwargs={'id': post.id})) 

    else: 
     form = Formulary() 

    return render(request, 'form.html', {'form' : form}) 

编辑：

我们都在做这个项目与@Valentin。我试图帮助他做这方面的工作。

完整回溯：

Environment: 


Request Method: GET 
Request URL: http://localhost:8000/BirthCertificate/formulaire 

Django Version: 1.10.3 
Python Version: 2.7.12 
Installed Applications: 
['django.contrib.admin', 
'django.contrib.auth', 
'django.contrib.contenttypes', 
'django.contrib.sessions', 
'django.contrib.messages', 
'django.contrib.staticfiles', 
'BirthCertificate', 
'Identity', 
'bootstrapform', 
'Accueil', 
'django_countries', 
'log', 
'Mairie', 
'Table', 
'Recensement', 
'Configurations', 
'debug_toolbar'] 
Installed Middleware: 
['django.contrib.sessions.middleware.SessionMiddleware', 
'django.middleware.locale.LocaleMiddleware', 
'django.middleware.common.CommonMiddleware', 
'django.middleware.csrf.CsrfViewMiddleware', 
'django.middleware.gzip.GZipMiddleware', 
'django.contrib.auth.middleware.AuthenticationMiddleware', 
'django.contrib.auth.middleware.SessionAuthenticationMiddleware', 
'django.contrib.messages.middleware.MessageMiddleware', 
'django.middleware.clickjacking.XFrameOptionsMiddleware', 
'django.middleware.security.SecurityMiddleware', 
'debug_toolbar.middleware.DebugToolbarMiddleware'] 



Traceback: 

File "/usr/local/lib/python2.7/site-packages/django/core/handlers/exception.py" in inner 
    39.    response = get_response(request) 

File "/usr/local/lib/python2.7/site-packages/django/core/handlers/base.py" in _legacy_get_response 
    249.    response = self._get_response(request) 

File "/usr/local/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response 
    187.     response = self.process_exception_by_middleware(e, request) 

File "/usr/local/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response 
    185.     response = wrapped_callback(request, *callback_args, **callback_kwargs) 

File "/usr/local/lib/python2.7/site-packages/django/contrib/auth/decorators.py" in _wrapped_view 
    23.     return view_func(request, *args, **kwargs) 

File "/Users/valentinjungbluth/Desktop/Django/Etat_civil/BirthCertificate/views.py" in BirthCertificate_Form 
    55.  return render(request, 'BC_form.html', {'Bform' : Bform}) 

File "/usr/local/lib/python2.7/site-packages/django/shortcuts.py" in render 
    30.  content = loader.render_to_string(template_name, context, request, using=using) 

File "/usr/local/lib/python2.7/site-packages/django/template/loader.py" in render_to_string 
    68.  return template.render(context, request) 

File "/usr/local/lib/python2.7/site-packages/django/template/backends/django.py" in render 
    66.    return self.template.render(context) 

File "/usr/local/lib/python2.7/site-packages/django/template/base.py" in render 
    206.     with context.bind_template(self): 

File "/usr/local/Cellar/python/2.7.12_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/contextlib.py" in __enter__ 
    17.    return self.gen.next() 

File "/usr/local/lib/python2.7/site-packages/debug_toolbar/panels/templates/panel.py" in _request_context_bind_template 
    51.   updates.update(context) 

Exception Type: TypeError at /BirthCertificate/formulaire 
Exception Value: cannot convert dictionary update sequence element #0 to a sequence 

他的剧本正是这样：

def BirthCertificate_Form(request) : 
    # Fonction permettant de créer le formulaire Acte de Naissance et le remplissage 

    query_lastname = request.GET.get('lastname') 
    cache.set('query_lastname', query_lastname, 300) 
    print cache.get('query_lastname') 

    if request.method == 'POST': 

     Bform = BirthCertificateForm(request.POST or None) 

     if Bform.is_valid() : # Vérification sur la validité des données 
      if '_save2' in request.POST : 
       post = Bform.save() 
       return HttpResponseRedirect(reverse('BC_treated', kwargs={'id': post.id})) 

    else: 
     Bform = BirthCertificateForm() 

    return render(request, 'BC_form.html', {'Bform' : Bform}) 

Answer 1

我发现的错误。在我context_processors.py文件，我有：

def cached_queries(request): 
    return {'query_lastname', cache.get('query_lastname')} 

，而不是

def cached_queries(request): 
    return {'query_lastname' : cache.get('query_lastname')} 

现在看来工作，所以我对这个愚蠢的问题道歉......