TypeError en Django con python 2.7

Question

Hola, nuevo en Django y necesito ayuda, cuando agrego mi modelo a la interfaz de administración en Django me parece bien, pero cuando intento agregar o eliminar una entrada en la base de datos obtengo:

TypeError at /admin/Users/user/add/  
    coercing to Unicode: need string or buffer, tuple found 

he hecho una búsqueda en Google y ha añadido:

def __str__(self): 
    return "" 

Para el final de mi clase de modelo de usuario, pero sin éxito. ¿No estoy seguro si tengo que ingresar algo en mi admin.py? Tampoco tengo ningún método de "agregar" en mi clase de usuario, también devuelve nada más que el método anterior.

¡Gracias por cualquier ayuda!

la clase de usuario:

class User(models.Model): 
GENDER_CHOICES = (
     ('M', 'Male'), 
     ('F', 'Female'), 
    ) 

username = models.CharField(max_length=30) 
email = models.EmailField() 
password = models.CharField(max_length=30) 

birth_date = models.DateField() 
description = models.CharField(max_length=200) 
gender = models.CharField(max_length = 1, choices = GENDER_CHOICES, default = "M") 
image = models.ImageField(upload_to="media/photos/") 
signupIP = models.IPAddressField() 
privateOrPublic = models.BooleanField(default=1) 

def __str__(self): 
    return "" 

y el simple admin.py en/Usuarios/

from Users.models import User 
from django.contrib import admin 

admin.site.register(User) 

Rastreo:

Environment: 

Request Method: POST 
Request URL: http://127.0.0.1/admin/Users/user/add/ 
Django Version: 1.2.3 
Python Version: 2.7.0 
Installed Applications: 
['django.contrib.auth', 
    'django.contrib.contenttypes', 
    'django.contrib.sessions', 
    'django.contrib.sites', 
    'django.contrib.messages', 
    'django.contrib.admin', 
    'Users'] 
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 
    100.      response = callback(request, *callback_args, **callback_kwargs) 
File "C:\Python27\lib\site-packages\django\contrib\admin\options.py" in wrapper 
    239.     return self.admin_site.admin_view(view)(*args, **kwargs) 
File "C:\Python27\lib\site-packages\django\utils\decorators.py" in _wrapped_view 
    76.      response = view_func(request, *args, **kwargs) 
File "C:\Python27\lib\site-packages\django\views\decorators\cache.py" in _wrapped_view_func 
    69.   response = view_func(request, *args, **kwargs) 
File "C:\Python27\lib\site-packages\django\contrib\admin\sites.py" in inner 
    190.    return view(request, *args, **kwargs) 
File "C:\Python27\lib\site-packages\django\utils\decorators.py" in _wrapper 
    21.    return decorator(bound_func)(*args, **kwargs) 
File "C:\Python27\lib\site-packages\django\utils\decorators.py" in _wrapped_view 
    76.      response = view_func(request, *args, **kwargs) 
File "C:\Python27\lib\site-packages\django\utils\decorators.py" in bound_func 
    17.     return func(self, *args2, **kwargs2) 
File "C:\Python27\lib\site-packages\django\db\transaction.py" in _commit_on_success 
    299.      res = func(*args, **kw) 
File "C:\Python27\lib\site-packages\django\contrib\admin\options.py" in add_view 
    795.     self.save_model(request, new_object, form, change=False) 
File "C:\Python27\lib\site-packages\django\contrib\admin\options.py" in save_model 
    597.   obj.save() 
File "C:\Python27\lib\site-packages\django\db\models\base.py" in save 
    434.   self.save_base(using=using, force_insert=force_insert, force_update=force_update) 
File "C:\Python27\lib\site-packages\django\db\models\base.py" in save_base 
    517.       for f in meta.local_fields if not isinstance(f, AutoField)] 
File "C:\Python27\lib\site-packages\django\db\models\fields\files.py" in pre_save 
    255.    file.save(file.name, file, save=False) 
File "C:\Python27\lib\site-packages\django\db\models\fields\files.py" in save 
    91.   name = self.field.generate_filename(self.instance, name) 
File "C:\Python27\lib\site-packages\django\db\models\fields\files.py" in generate_filename 
    282.   return os.path.join(self.get_directory_name(), self.get_filename(filename)) 
File "C:\Python27\lib\site-packages\django\db\models\fields\files.py" in get_filename 
    279.   return os.path.normpath(self.storage.get_valid_name(os.path.basename(filename))) 
File "C:\Python27\lib\site-packages\django\utils\functional.py" in __getattr__ 
    276.    self._setup() 
File "C:\Python27\lib\site-packages\django\core\files\storage.py" in _setup 
    242.   self._wrapped = get_storage_class()() 
File "C:\Python27\lib\site-packages\django\core\files\storage.py" in __init__ 
    133.   self.location = os.path.abspath(location) 
File "C:\Python27\lib\ntpath.py" in abspath 
    465.     path = _getfullpathname(path) 

Exception Type: TypeError at /admin/Users/user/add/ 
Exception Value: coercing to Unicode: need string or buffer, tuple found 

Answer 1

En su definición MEDIA_ROOT, cambia de sustituir a tener una cadena sin formato, ya que de lo contrario reemplazarás una sola barra invertida literal en lugar de las dos que quisiste decir.

MEDIA_ROOT = os.path.join(os.path.dirname(file), "media").replace(r"\\", "//")