如何在Django中使用上下文

Question

我正在尝试创建一个确认页面。 User可以在一页上创建订单，然后create_order视图验证forms并将带有上下文的请求发送到另一个名为confirm_order view 。 我认为我会正确工作，但是有一个问题。 首次confirm_order获取包含forms数据的request和context 。 但是，当User在此页面上单击确认时，在没有此上下文的情况下调用了confirm_view因此出现错误：

 > ValidationError at /create-job/ [u'ManagementForm data is missing or > has been tampered with'] 

你们知道如何第二次发送上下文吗？

这是这两个视图：

def create_order(request):
    LanguageLevelFormSet = formset_factory(LanguageLevelForm, extra=5, max_num=5)
    language_level_formset = LanguageLevelFormSet(request.POST or None)
    job_creation_form = JobCreationForm(request.POST or None, request.FILES or None)

    context = {'job_creation_form': job_creation_form,
               'formset': language_level_formset}

    if request.method == 'POST':
        if job_creation_form.is_valid() and language_level_formset.is_valid():
            cleaned_data_job_creation_form = job_creation_form.cleaned_data
            cleaned_data_language_level_formset = language_level_formset.cleaned_data

            context = {
                'cleaned_data_job_creation_form': cleaned_data_job_creation_form,
                "cleaned_data_language_level_formset": cleaned_data_language_level_formset,
            }
            mutable = request.POST._mutable # I'm adding parameter 'review' to be able to differ between two different posts in confirm_order view
            request.POST._mutable = True
            request.POST['review'] = True
            request.POST._mutable = mutable
            return confirm_order(request, context)
        else:
            return render(request, 'auth/jobs/create-job.html', context=context)
    return render(request, 'auth/jobs/create-job.html', context=context)


def confirm_order(request, context):
    print context
    cleaned_data_job_creation_form = context['cleaned_data_job_creation_form']
    cleaned_data_language_level_formset = context['cleaned_data_language_level_formset']
    print request.POST['review']
    if request.method == 'POST' and request.POST['review'] == True:

        file = cleaned_data_job_creation_form['file']
        count = 5 #simplified multiple rows
        jobs = []
        for language_level_form in [d for d in cleaned_data_language_level_formset if d]:
            language = language_level_form['language']
            level = language_level_form['level']
            d = {}
            d['language_from'] = cleaned_data_job_creation_form['language_from'].name
            d['language_to'] = language
            d['number_of_characters'] = count
            d['price_per_sign'] = 1
            d['estimated_price'] = count * d['price_per_sign']
            jobs.append(d)

        table = CreatedOrdersTable(jobs)
        context = {'table': table,
                   'cleaned_data_job_creation_form': cleaned_data_job_creation_form,
                   'cleaned_data_language_level_formset': cleaned_data_language_level_formset}
        return render(request, 'auth/jobs/confirm-order.html', context=context)
    else:
        for language_level_form in [d for d in cleaned_data_language_level_formset if d]:
            language = language_level_form['language']
            level = language_level_form['level']

            Job.objects.create(
                    customer=request.user,
                    text_to_translate=cleaned_data_job_creation_form['text_to_translate'],
                    file=cleaned_data_job_creation_form['file'],
                    short_description=cleaned_data_job_creation_form['short_description'],
                    notes=cleaned_data_job_creation_form['notes'],
                    language_from=cleaned_data_job_creation_form['language_from'],
                    language_to=language,
                    level=level,
            )
        return HttpResponseRedirect('/order-success')

Answer 1

您将在第一个视图上返回模板渲染。 因此，请求不会在您的Confirm_order视图上结束。

如果需要，可以重定向到reverse（'confirm_order'）并在会话中添加数据。

在confirm_order视图中，您将从会话中弹出数据并继续执行流程。