How to save image to user folder in django?

Question

I would like to save the downloaded images in separate folders. For example, custom photos should be saved in / media / images / 4 /

Here is the function and model and views that I came across:

Model:

def get_uplaod_file_name(user,filename):
    return 'photos/%s/%s_%s' %  str(user.id),  (str(time()).replace('.','_'), filename)



class UserPic(models.Model):
    user = models.ForeignKey(User, unique=False)
    picfile = ImageWithThumbsField(upload_to= get_uplaod_file_name, sizes=((200,200),(1200,1200)))
    caption = models.CharField(max_length=200 , blank=True, null=True)
    created_at = models.DateTimeField(auto_now_add=True)


    @models.permalink
    def get_absolute_url(self):
        return ('view_pirate', None, {'user': self.account.user})    

    def __unicode__(self):
        return unicode(self.picfile.name) 

Views:

@login_required
def upload(request):
    # Handle file upload
    thisuser =User.objects.get(username = request.user.username)
    # Load pics of this user

    if request.method == 'POST':
        picform = PicForm(request.POST, request.FILES)
        if picform.is_valid():
            newpic = UserPic(picfile = request.FILES['picfile'])
            newpic = picform.save(commit=False)
            newpic.user_id = request.user.id
            newpic.save()
            message = "file %s is uploaded" % newpic

    else:
        picform = PicForm() # A empty, unbound form

    args= {}
    args['picform'] = picform

    return render_to_response('userpics/upload.html',args,
        context_instance=RequestContext(request))        

However, after many tricks, get_uplaod_file_nameit still doesn't work. I get errors like:

TypeError at /pics/upload/
not enough arguments for format string

Appreciate your help to solve this problem.

Answer 1

You must pass the tuple to the string format operator:

def get_uplaod_file_name(userpic, filename):
    return u'photos/%s/%s_%s' % (str(userpic.user.id),
                                 str(time()).replace('.', '_'),
                                 filename)

Pay attention to the brackets of the first and last round.

unicode u', , -ascii .