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因此，我的目标是让用户点击发票的链接，然后打开一个窗口，其中显示该发票的PDF。目前，我收到以下错误：

NoReverseMatch at /laptops/invoices/
Reverse for 'pdfview' with keyword arguments '{'invoice': 'uploads/wordpress-pdf-invoice-plugin-sample.pdf'}' not found. 1 pattern(s) tried: ['laptops\\/invoices\\/(?P<invoice>[^/]+)\\/$'] 

糟糕的编程习惯，我知道。我只是想在我清理它之前让它工作，但我不知道我做错了什么。

urls.py

urlpatterns = [
    path('',views.laptop_list, name ="list"),
    path('add/',views.laptop_add,name="add"),
    path('invoices/', views.invoice_list,name="invoices"),
    path('invoices/<str:invoice>/', views.pdf_view, name ="pdfview")
]

views.py

def pdf_view(request, invoice):
    invoicename=Laptop.objects.get(invoicename=invoice)
    pdfpath = settings.MEDIA_ROOT
    with open(pdfpath+'/'+invoicename, encoding="latin-1") as pdf:
        response = HttpResponse(pdf.read(), content_type='application/pdf')
        return response

laptop_invoices.html

<h2>View invoices</h2>
{%for i in invoices%}
<ul>
   <li>
       <a href = "{%url 'laptops:pdfview' invoice=i.invoice%}"> {{i.invoice}} </a>
   </li>
</ul>
{%endfor%}

Answer 1

我明白了。 invoicename=Laptop.objects.get(invoicename=invoice)正在返回QuerySet而不是string，因此PDF的路径永远不会起作用。谢谢你的帮助。