/1 参数处的 TypeError 应该是字符串、字节或整数，而不是下载

Question

我想从媒体文件中提供我的下载文件，并且这些文件正在通过管理员上传。我尝试了一些东西，但我收到了这个错误

TypeError at /1

argument should be string, bytes or integer, not Download

以下是我的代码。

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 链接

    <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

这个视图处理上传。

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

Answer 1

您必须将参数作为download file path 字符串而不是Download 对象传递，只需将download 函数更改为：

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

我已经验证了你的代码，这对你有用：

http://127.0.0.1:8000/peruse/download/1（此处为download_id=1）会给你第一个文件：

更新：

确保您的根yourproject/urls.py 是这样的：

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yourproject/peruse/urls.py是这样的：

from django.conf.urls import url

from . import views

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

并确保您已经上传了文件。

Answer 2

感谢大家的帮助。我能够想出一些适合你的想法的东西。

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

它现在正在工作。用户现在可以下载文件了