在/ 1參數處的TypeError應該是字符串，字節或整數，而不是下載

Question

這裏是新的，我想從媒體文件中提供我的下載文件，並通過管理員上傳文件。我試圖做的東西，我得到這個錯誤

類型錯誤在/ 1

參數應該是字符串，字節或整數，而不是下載

下面

是我的代碼。

view.py

def download(request, download_id): 
     downloading = Download.objects.get(pk=download_id) 
     if os.path.exists(downloading): 
     with open(downloading, 'rb') as fh: 
      response = HttpResponse(fh.read(), content_type="text/pdf") 
      response['Content-Disposition'] = 'inline; filename=' + os.path.basename(downloading) 
      response['Content-Length'] = os.path.getsize(downloading) 
      return response 
     pdf.closed 
    raise Http404 

url.py

url(r'^(?P<download_id>\d+)$', views.download, name='download'), 

HTML鏈接

<a href="{% url 'peruse:download' download.id %}" class="btn btn-generic btn-sm" role="button">DOWNLOAD</a> 

model.py

class Download(models.Model): 
     pdf_name = models.CharField(max_length=500, blank=False) 
     pdf_file = models.FileField(upload_to='Downloads/%d-%m-%Y/', blank = False,) 
     created_at = models.DateTimeField(auto_now_add = True) 
     updated_at = models.DateTimeField(auto_now = True) 
     is_visible = models.BooleanField(default = True) 

     def __str__(self): 
      return self.pdf_name 

和這個視圖處理上傳。

def upload(request): 
     uploading = Download.objects.filter(is_visible = True) 
     context = { 'uploading' : uploading } 
     fillAuthContext(request, context) 
     return render(request, 'library/resources.html', context) 

請幫我瞭解如何使這項工作。謝謝

Answer 1

謝謝大家的幫助。我能夠想出一些與你的想法一致的東西。

view.py

def download(request, download_id): 
     downloading = Download.objects.get(pk=download_id) 
     path = downloading.pdf_file.name 
     file_path = os.path.join(settings.MEDIA_ROOT, path) 
     if os.path.exists(file_path): 
      with open(file_path, 'rb') as pdf: 
       response = HttpResponse(pdf.read(), content_type="text/pdf") 
       response['Content-Disposition'] = 'inline; filename=' + os.path.basename(file_path) 
       response['Content-Length'] = os.path.getsize(file_path) 
       return response 
      pdf.closed 
     raise Http404 

其現在的工作。用戶現在可以下載文件

Answer 2

你必須傳遞參數作爲download file path字符串，而不是Download對象，只是改變你的download功能：

def download(request, download_id): 
    downloading = Download.objects.get(pk=download_id) 
    file_path = downloading.pdf_file.name 
    if os.path.exists(file_path): 
     with open(file_path, 'rb') as fh: 
      response = HttpResponse(fh.read(), content_type="text/pdf") 
      response['Content-Disposition'] = 'inline; filename=' + os.path.basename(file_path) 
      response['Content-Length'] = os.path.getsize(file_path) 
      return response 
     pdf.closed 
    raise Http404 

我已經驗證你的代碼，這會爲你工作：

http://127.0.0.1:8000/peruse/download/1（download_id=1這裏）會給你的第一個文件：

更新：

確保你的根yourproject/urls.py是這樣的：

from django.conf.urls import url,include 
from django.contrib import admin 

urlpatterns = [ 
    url(r'^peruse/',include('peruse.urls')), 
    url(r'^admin/', admin.site.urls), 
] 

而且yourproject/peruse/urls.py是這樣的：

from django.conf.urls import url 

from . import views 

urlpatterns = [ 
    url(r'^download/(?P<download_id>\d+)$', views.download, name='download'), 
] 

並確保你已經上傳的文件。