Python django：如何下载模板

我在django应用程序中有一个表单，其中自动提取用户的数据，以及供用户在模板内部填写的可写字段

我构建了另一个html页面，其中包含pdf文档的形状，我正在尝试（未成功）获取用户在pdf中呈现的模板中输入的数据

我只能渲染pdf，但没有填充任何字段

老实说，我对这个项目的这一部分感到非常困惑，我无法弄清楚到底是什么导致了这个bug。我希望有人能帮助我

以下是用户编辑pdf的视图：

def invoice_generator_assembly(request):
    challan_number = ChallanNumber.objects.get(id=1)
    works = Work.objects.all().order_by('code')
    hsc   = HSCNumber.objects.all()
    company = MyCompany.objects.get(id=1)
    context = {
        'works'         : works, 
        'hsc'           : hsc,
        'challan_number': challan_number,
        'a' : company,
    }
    return render(request, 'invoice_assembly.html', context)

下面是呈现pdf的视图的外观：

def generate_pdf_assembly(request):
    '''
        Helper function to generate pdf in case of ajax request
    '''
    context = request.GET.copy()
    context['works'] = json.loads(context['works'])
    #context['amount_in_words'] = num2words.number_to_words(round(float(context.get('grand_total')), 2)) + ' only'
    challan_number        = context.get('challan_number')
    date                  = context.get('date')
    client_name           = context.get('client_name')
    client_address = context.get('client_address')
    total_weight          = context.get('total_weight')
    total_amount          = context.get('grand_total')

    # If user enters the same challan number then the previous record for that paricular challan number
    # is deleted and new record is overriden onto the old one
    try:
        report = Report.objects.create(
                    challan_number=challan_number,
                    
                    date=date,
                    client_name = client_name,
                    client_address = client_address,
                    total_weight = total_weight, 
                    total_amount=total_amount
                )
        report.save()

        challan = ChallanNumber.objects.first()
        challan.challan_number += 1
        challan.save()
    except:
        QuantityRate.objects.filter(report__challan_number=challan_number).delete()
        Report.objects.filter(challan_number=challan_number).delete()
        report = Report.objects.create(
                    challan_number=challan_number,
                    client_name = client_name, 
                    client_address = client_address,
                    date=date,
                    total_weight = total_weight,
                    total_amount=total_amount
                )
        report.save()

        challan = ChallanNumber.objects.first()
        challan.challan_number += 1
        challan.save()

    # Sometime user might delete a row dynamically and hence an empty dict is passed to server
    # Hence we will check if amount is present in the dict else we delete that particular dic record
    for index, work in enumerate(context.get('works')):
        if work.get('amount'):
            quant = QuantityRate.objects.create(
                        quantity=work.get('quantity'),
                        rate=work.get('rate'),
                        amount=work.get('amount')
                    )
            quant.save()
            quant.report.add(report)
        else:
            del context.get('works')[index]
    context['date'] = datetime.datetime.strptime(date, '%Y-%m-%d').strftime('%d-%m-%Y')
    context['dated'] = datetime.datetime.strptime(context.get('dated'), '%Y-%m-%d').strftime('%d-%m-%Y')
    request.session['context'] = context
    return redirect('get_pdf_assembly')

要获取pdf，请执行以下操作：

def get_pdf_assembly(request):
    #context = request.GET.copy()
    #request.session['context'] = context
    pdf = render_to_pdf('pdf/invoice_generator_assembly.html', request.session['context'])
    if pdf:
        response = HttpResponse(pdf, content_type='application/pdf')
        filename = "Assembly_Invoice_{}.pdf".format(request.session.get('context').get('challan_number'))
        content = "inline; filename={}".format(filename)
        content = "attachment; filename={}".format(filename)
        response['Content-Disposition'] = content
        return response
    return HttpResponse("Not found")