TypeError嘗試訪問靜態媒體目錄上的任何文件

Question

我試圖從媒體目錄將JPG圖像加載到我的Django服務器。

我沒有問題從STATIC_ROOT加載CSS，但我無法從MEDIA_ROOT訪問圖像既不css。無論是從應用程序或從瀏覽器

我使用PILL庫進行縮略圖和抗鋸齒img保存之前，上傳運行良好，圖像複製到我的MEDIA_ROOT。但該應用程序仍然無法訪問它。瀏覽器中的調試工具（Firebug）聲明'圖像加載失敗'，但鏈接內的網址完全正確。

這是我在嘗試打開該文件到瀏覽器的錯誤：

Environment:

Request Method: GET 
Request URL: http://127.0.0.1:8000/media/images/django_img.jpg 

Django Version: 1.4c1 
Python Version: 2.7.0 
Installed Applications: 
('django.contrib.auth', 
'django.contrib.contenttypes', 
'django.contrib.sessions', 
'django.contrib.sites', 
'django.contrib.messages', 
'django.contrib.staticfiles', 
'django.contrib.flatpages', 
'django.contrib.admin', 
'todo', 
'blog', 
'forum') 
Installed Middleware: 
('django.middleware.common.CommonMiddleware', 
'django.contrib.sessions.middleware.SessionMiddleware', 
'django.middleware.csrf.CsrfViewMiddleware', 
'django.contrib.auth.middleware.AuthenticationMiddleware', 
'django.contrib.messages.middleware.MessageMiddleware') 

    Traceback: 

    File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in get_response 
    111.       response = callback(request, *callback_args, **callback_kwargs) 

    File "C:\Python27\lib\site-packages\django\views\static.py" in serve 
    48.  fullpath = os.path.join(document_root, newpath) 

    File "C:\Python27\lib\ntpath.py" in join 96. assert len(path) > 0 Exception Type: TypeError at /media/images/django_img.jpg Exception Value: object of type 'NoneType' has no len() 

The server tells the problem is in C:\Python27\lib\ntpath.py in join. 

At line 96 <code> 
# Join, and ensure there's a separator. 
assert len(path) > 0 

URL被存儲到img變量一個Unicode字符串。

應用程序可能會如何正確寫入模板，圖像是否存在，MEDIA_URL是否設置並正常工作，但圖像是否仍未加載到瀏覽器中？

這裏是我的「urls.py」作爲懇請：

from django.conf.urls import patterns, include, url 
from django.conf import settings 

from django.conf.urls.defaults import * 
from django.utils.translation import ugettext as _ 

import os 


# Uncomment the next two lines to enable the admin: 
from django.contrib import admin 
admin.autodiscover() 


urlpatterns = patterns('', 
    url(r'^admin/', include(admin.site.urls)), 
    (r"^forum/(\d+)/$", "forum.views.forum"), 
    (r"^thread/(\d+)/$", "forum.views.thread"), 
    (r"^post/(new_thread|reply)/(\d+)/$", "forum.views.post"), 
    (r"^reply/(\d+)/$", "forum.views.reply"), 
    (r"^new_thread/(\d+)/$", "forum.views.new_thread"), 
    (r"^profile/(\d+)/$", "forum.views.profile"), 
    (r'^media/(?P<path>.*)$', 'django.views.static.serve'), 

    (r"", "forum.views.main"), 


) 

if settings.DEBUG: 
    # serving the media files for dojango/dojo (js/css/...) 
    urlpatterns += patterns('', 
     (r'^media/(?P<path>.*)$', 'django.views.static.serve', 
      {'document_root': os.path.join(os.path.dirname(__file__), "media")}), 
    ) 

當我瀏覽這個觀點應用程序運作良好，並上傳PIC，但圖像無法加載到視圖和其他視圖也：

def profile(request, pk):

profile = UserProfile.objects.get(user=pk) 
    img = None # I tried to insert here an empty string but no result 

    if request.method == "POST": 
     pf = ProfileForm(request.POST, request.FILES, instance=profile) 
     if pf.is_valid(): 
      pf.save() 
      # resize and save image under same filename 
      imfn = pjoin(MEDIA_ROOT, profile.avatar.name) 
      im = PImage.open(imfn) 
      im.thumbnail((160,160), PImage.ANTIALIAS) 
      im.save(imfn, "JPEG") 
    else: 
     pf = ProfileForm(instance=profile) 

    if profile.avatar: 
     img = "/media/" + profile.avatar.name 

    return render_to_response("forum/profile.html", add_csrf(request, pf=pf, img=img)) 

感謝您的時間

Answer 1

你有2個呼叫在您的網址，所以它假設None第一個不具備document_root，並且提出了對os.path.join