Re: Error: 'NoneType' object has no attribute 'strip'

this is stacktrace when I use: slug = AutoSlugField(populate_from='name') in my model

Environment:

Request Method: POST

Request URL: http://127.0.0.1:8000/admin/product/shop/add/

Django Version: 1.7.1

Python Version: 3.4.2

Installed Applications:

('django.contrib.admin',

 'django.contrib.auth',

 'django.contrib.contenttypes',

 'django.contrib.sessions',

 'django.contrib.messages',

 'django.contrib.staticfiles',

 'product')

Installed Middleware:

('django.contrib.sessions.middleware.SessionMiddleware',

 'django.middleware.common.CommonMiddleware',

 'django.middleware.csrf.CsrfViewMiddleware',

 'django.contrib.auth.middleware.AuthenticationMiddleware',

 'django.contrib.auth.middleware.SessionAuthenticationMiddleware',

 'django.contrib.messages.middleware.MessageMiddleware',

 'django.middleware.clickjacking.XFrameOptionsMiddleware')

Traceback:

File "e:\python\lib\site-packages\django\core\handlers\base.py" in get_response

  111.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "e:\python\lib\site-packages\django\contrib\admin\options.py" in wrapper

  584.                 return self.admin_site.admin_view(view)(*args, **kwargs)

File "e:\python\lib\site-packages\django\utils\decorators.py" in _wrapped_view

  105.                     response = view_func(request, *args, **kwargs)

File "e:\python\lib\site-packages\django\views\decorators\cache.py" in _wrapped_view_func

  52.         response = view_func(request, *args, **kwargs)

File "e:\python\lib\site-packages\django\contrib\admin\sites.py" in inner

  204.             return view(request, *args, **kwargs)

File "e:\python\lib\site-packages\django\contrib\admin\options.py" in add_view

  1454.         return self.changeform_view(request, None, form_url, extra_context)

File "e:\python\lib\site-packages\django\utils\decorators.py" in _wrapper

  29.             return bound_func(*args, **kwargs)

File "e:\python\lib\site-packages\django\utils\decorators.py" in _wrapped_view

  105.                     response = view_func(request, *args, **kwargs)

File "e:\python\lib\site-packages\django\utils\decorators.py" in bound_func

  25.                 return func.__get__(self, type(self))(*args2, **kwargs2)

File "e:\python\lib\site-packages\django\db\transaction.py" in inner

  394.                 return func(*args, **kwargs)

File "e:\python\lib\site-packages\django\contrib\admin\options.py" in changeform_view

  1405.                 self.save_model(request, new_object, form, not add)

File "e:\python\lib\site-packages\django\contrib\admin\options.py" in save_model

  1046.         obj.save()

File "e:\python\lib\site-packages\django\db\models\base.py" in save

  591.                        force_update=force_update, update_fields=update_fields)

File "e:\python\lib\site-packages\django\db\models\base.py" in save_base

  619.             updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)

File "e:\python\lib\site-packages\django\db\models\base.py" in _save_table

  700.             result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)

File "e:\python\lib\site-packages\django\db\models\base.py" in _do_insert

  733.                                using=using, raw=raw)

File "e:\python\lib\site-packages\django\db\models\manager.py" in manager_method

  92.                 return getattr(self.get_queryset(), name)(*args, **kwargs)

File "e:\python\lib\site-packages\django\db\models\query.py" in _insert

  921.         return query.get_compiler(using=using).execute_sql(return_id)

File "e:\python\lib\site-packages\django\db\models\sql\compiler.py" in execute_sql

  920.                 cursor.execute(sql, params)

File "e:\python\lib\site-packages\django\db\backends\utils.py" in execute

  85.             sql = self.db.ops.last_executed_query(self.cursor, sql, params)

File "e:\python\lib\site-packages\mysql\connector\django\base.py" in last_executed_query

  371.         return cursor.statement

File "e:\python\lib\site-packages\mysql\connector\django\base.py" in __getattr__

  147.         return getattr(self.cursor, attr)

File "e:\python\lib\site-packages\mysql\connector\cursor.py" in statement

  858.             return self._executed.strip()

Exception Type: AttributeError at /admin/product/shop/add/

Exception Value: 'NoneType' object has no attribute 'strip'

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