javascript之Django:随机函数调用导致管道中断

我的 View 中有“document_delete”，它调用“is_draft owner”:

这是“is_draft_owner”:

def is_draft_owner(id = None, user = None): 
    if id and user: 
        return user.pk is Draft.objects.get(id = id).user_id 
    else: 
        return False 
 
def document_delete(request): 
    if is_draft_owner(request.POST['id'], request.user): 
        draft = Draft.objects.get(id = request.POST['id']) 
        draft.delete() 
        return HttpResponse("done") 

这是页面的 View :

@login_required 
def posting_draft(request): 
    user = request.user 
    user_drafts = Draft.objects.filter(user = user) # Order by date last oppened 
    drafts = dict() 
    for d in user_drafts: 
        drafts[d.title] = d.id 
    alertnum = get_alertnum(user) 
    return render_to_response('Posting/Pages/posting_draft.html', {'STATIC_URL':STATIC_URL, 'draft_l' : drafts, 'selected':"dr", 'alertnum': alertnum}) 

不知何故，当我不调用“is_draft_owner”时，一切正常。当我调用它时，我得到这个:

    [12/Aug/2012 00:53:45] "GET /posting/drafts HTTP/1.1" 200 2783 
Traceback (most recent call last): 
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/handlers.py", line 86, in run 
    self.finish_response() 
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/handlers.py", line 127, in finish_response 
    self.write(data) 
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/handlers.py", line 210, in write 
    self.send_headers() 
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/handlers.py", line 268, in send_headers 
    self.send_preamble() 
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/handlers.py", line 192, in send_preamble 
    'Date: %s\r\n' % format_date_time(time.time()) 
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 324, in write 
    self.flush() 
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 303, in flush 
    self._sock.sendall(view[write_offset:write_offset+buffer_size]) 
error: [Errno 32] Broken pipe 
---------------------------------------- 
Exception happened during processing of request from ('127.0.0.1', 49948) 
Traceback (most recent call last): 
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py", line 582, in process_request_thread 
    self.finish_request(request, client_address) 
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py", line 323, in finish_request 
    self.RequestHandlerClass(request, client_address, self) 
  File "/Library/Python/2.7/site-packages/Django-1.4-py2.7.egg/django/core/servers/basehttp.py", line 139, in __init__ 
    super(WSGIRequestHandler, self).__init__(*args, **kwargs) 
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py", line 640, in __init__ 
    self.finish() 
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py", line 693, in finish 
    self.wfile.flush() 
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 303, in flush 
    self._sock.sendall(view[write_offset:write_offset+buffer_size]) 
error: [Errno 32] Broken pipe 
---------------------------------------- 

为了以防万一，使用此代码的 javascript 文件:

function delete_draft(id, name) { 
    var text = 'Are you sure you want to delete "' + name + '"?'; 
    var confirm = noty({ 
        text: text, 
        layout: 'center', 
        type: 'confirm', 
        modal: true, 
        buttons: [ 
 
        {addClass: 'btn btn-danger', text: 'Cancel', onClick: function($noty) { 
            $noty.close(); 
        } 
        }, 
            {addClass: 'btn btn-primary', text: 'Delete', onClick: function($noty) { 
                $.post('/ajax/drafts/delete', {id:id}, function(data) { 
                    document.location.reload(true); 
                }); 
                document.location.reload(true); 
            } 
            } 
    ]}); 
} 

我认为，但不知道，该页面正在调用删除文档，但随后在重新加载时中断。当我使用 google chrome 时，这从日志中似乎是有意义的(因为当我再次重新加载时，它已被删除)，但对于 Firefox 来说似乎并非如此。我正在运行开发服务器，但这些问题仍然存在，我不能拖延(有人说这是开发服务器的问题，但这样我什至无法开发)。

请您参考如下方法:

我将对您的代码发表一些评论；但我认为您应该修改问题并发送确切的错误；正如我在评论中提到的。

我将编辑您的代码 - 希望评论足够了:

# Here you mean to check for equality, `is` checks for identity 
# Also, you want the return of the comparison; so you don't need 
# an else. 
 
def is_draft_owner(id = None, user = None): 
    if id and user: 
        return user.pk == Draft.objects.get(id = id).user_id 
 
# You are POST-ing to this view, but 
# you need to exempt it from csrf checks 
# or edit your javascript to make sure it 
# sends the csrf cookie. 
def document_delete(request): 
    if request.method == 'POST': 
        if is_draft_owner(request.POST['id'], request.user): 
            # Get raises an exception that you are not catching: 
            try: 
                 draft = Draft.objects.get(id = request.POST['id']) 
            except Draft.DoesNotExist: 
                 # Do something 
 
            # OR you can do this 
            draft = get_object_or_404(Draft,id=request.POST['id']) 
            draft.delete() 
            return HttpResponse("done") 
    else: 
         return HttpResponse('Not Allowed')