我正在开发一个网络应用程序, 我在一个特性中遇到一个问题。 您可以在这里查看 < a href=> http://qlimp.com' rel=" nofollow" > http://qlimp.com 。 您也可以用这个来使用用户名/ password: supple/ dummy

登录后, 请单击链接 < 坚固> 。 移动以覆盖设置 。 您将看到可以上传图像的调色板, 输入一些文本 。

当您上传图像时, 我在 jQuery 中写了 ajax 请求, 该请求将图像上传到服务器, 并显示该图像的完整背景预览 。

J 查询

$( #id_tmpbg ).live( change , function()
    {
    $("#ajax-loader").show();
    $("#uploadform").ajaxForm({success: showResponse}).submit();
    });

function showResponse(responseText, statusText, xhr, $form)  { 
    $.backstretch(responseText)
    $("#ajax-loader").hide();
}

所以这里的问题是 当我上传图像时 它显示

ValueError at /cover/ 
The view cover.views.backgroundview didn t return an HttpResponse object. 
Request Method: POST Request URL: http://qlimp.com/cover/ 

我实际上是在视图中返回 HttpResponse 对象 。

视图. py :

@login_required
def backgroundview(request):
    if request.is_ajax():
        form = BackgroundModelForm(request.POST, request.FILES)
        if form.is_valid():
            try:
                g = BackgroundModel.objects.get(user=request.user)
            except BackgroundModel.DoesNotExist:
                data = form.save(commit=False)
                data.user = request.user
                data.save()
            else:
                if g.tmpbg !=    and g.tmpbg != g.background:
                    image_path = os.path.join(settings.MEDIA_ROOT, str(g.tmpbg))
                    try:
                        os.unlink(image_path)
                    except:
                        pass
                data = BackgroundModelForm(request.POST, request.FILES, instance=g).save()
            return HttpResponse(data.tmpbg.url)
    else:
        form = BackgroundModelForm()
        return render_to_response("cover.html", { form : form}, context_instance=RequestContext(request))

模型. py :

class BackgroundModel(models.Model):
    user = models.OneToOneField(User)
    background = models.ImageField(upload_to= backgrounds , null=True, blank=True)
    tmpbg = models.ImageField(upload_to= backgrounds , null=True, blank=True)

class BackgroundModelForm(ModelForm):
    class Meta:
        model = BackgroundModel
        exclude = ( user , background )

But these things are working on my computer(save the image and shows the background preview) but not in the production server. Why is it so? I ve uploaded the same code to the server.

有人能帮我吗?