ユーザーフォルダへのDjango - ImageFieldの保存に失敗する

Question

ファイルを正常にアップロードできますが、ログインしたユーザー名としてフォルダを指定することはできません。私は、次のことを試してみました：

def user_directory_path(instance, filename): 
    # file will be uploaded to MEDIA_ROOT/user_<id>/<filename> 
    return 'user_{0}/{1}'.format(instance.user.id, filename) 

class Document(models.Model): 
    user = models.OneToOneField(User) 
    document = models.ImageField(upload_to=user_directory_path) 
    uploaded_at = models.DateTimeField(auto_now_add=True) 

が、次のエラーが表示さ：次のようにフォームがある

Django Version: 1.9.6 
Exception Type: RelatedObjectDoesNotExist 
Exception Value: Document has no user. 

を：

class DocumentForm(forms.ModelForm): 
    class Meta: 
     model = Document 
     fields = ('document',) 

ビューでは、次のように：

@login_required 
def profile(request, extra_context={}): 
    if request.method == 'POST': 
     form = DocumentForm(request.POST, request.FILES) 
     if form.is_valid(): 
      form.save() 
      return redirect('profile') 
    else: 
     form = DocumentForm() 
    return render(request, 'meta/profile.html', { 
        'form': form 
        }) 

アドバイスありがとうございますd、アラン。以下

全トレース：あなたは

from datetime import datetime 

を持っているよう

Environment: 


Request Method: POST 
Request URL: http://127.0.0.1:8000/profile/ 

Django Version: 1.9.6 
Python Version: 2.7.10 
Installed Applications: 
('django.contrib.auth', 
'django.contrib.sites', 
'django.contrib.contenttypes', 
'django.contrib.sessions', 
'django.contrib.messages', 
'django.contrib.staticfiles', 
'django.contrib.admin', 
'django.contrib.humanize', 
'avatar', 
'mathfilters', 
'smart_selects', 
'tinymce', 
'dbbackup', 
'django_ical', 
'crispy_forms', 
'meta') 
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', 
'django.middleware.clickjacking.XFrameOptionsMiddleware', 
'fbf.middleware.QueryCountDebugMiddleware') 



Traceback: 

    File "/Users/alantingey/virtualenv/fbf/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response 
     149.      response = self.process_exception_by_middleware(e, request) 

    File "/Users/alantingey/virtualenv/fbf/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response 
     147.      response = wrapped_callback(request, *callback_args, **callback_kwargs) 

    File "/Users/alantingey/virtualenv/fbf/lib/python2.7/site-packages/django/contrib/auth/decorators.py" in _wrapped_view 
     23.     return view_func(request, *args, **kwargs) 

    File "/Users/alantingey/freebetfriend.com/meta/views.py" in profile 
     71.    form.save() 

    File "/Users/alantingey/virtualenv/fbf/lib/python2.7/site-packages/django/forms/models.py" in save 
     451.    self.instance.save() 

    File "/Users/alantingey/virtualenv/fbf/lib/python2.7/site-packages/django/db/models/base.py" in save 
     708.      force_update=force_update, update_fields=update_fields) 

    File "/Users/alantingey/virtualenv/fbf/lib/python2.7/site-packages/django/db/models/base.py" in save_base 
     736.    updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields) 

    File "/Users/alantingey/virtualenv/fbf/lib/python2.7/site-packages/django/db/models/base.py" in _save_table 
     820.    result = self._do_insert(cls._base_manager, using, fields, update_pk, raw) 

    File "/Users/alantingey/virtualenv/fbf/lib/python2.7/site-packages/django/db/models/base.py" in _do_insert 
     859.        using=using, raw=raw) 

    File "/Users/alantingey/virtualenv/fbf/lib/python2.7/site-packages/django/db/models/manager.py" in manager_method 
     122.     return getattr(self.get_queryset(), name)(*args, **kwargs) 

    File "/Users/alantingey/virtualenv/fbf/lib/python2.7/site-packages/django/db/models/query.py" in _insert 
     1039.   return query.get_compiler(using=using).execute_sql(return_id) 

    File "/Users/alantingey/virtualenv/fbf/lib/python2.7/site-packages/django/db/models/sql/compiler.py" in execute_sql 
     1059.    for sql, params in self.as_sql(): 

    File "/Users/alantingey/virtualenv/fbf/lib/python2.7/site-packages/django/db/models/sql/compiler.py" in as_sql 
     1019.     for obj in self.query.objs 

    File "/Users/alantingey/virtualenv/fbf/lib/python2.7/site-packages/django/db/models/sql/compiler.py" in pre_save_val 
     968.   return field.pre_save(obj, add=True) 

    File "/Users/alantingey/virtualenv/fbf/lib/python2.7/site-packages/django/db/models/fields/files.py" in pre_save 
     311.    file.save(file.name, file, save=False) 

    File "/Users/alantingey/virtualenv/fbf/lib/python2.7/site-packages/django/db/models/fields/files.py" in save 
     90.   name = self.field.generate_filename(self.instance, name) 

    File "/Users/alantingey/virtualenv/fbf/lib/python2.7/site-packages/django/db/models/fields/files.py" in generate_filename 
     328.    directory_name, filename = os.path.split(self.upload_to(instance, filename)) 

    File "/Users/alantingey/freebetfriend.com/meta/models.py" in user_directory_path 
     22.  today_date = datetime.datetime.today().date() 

    Exception Type: AttributeError at /profile/ 
    Exception Value: type object 'datetime.datetime' has no attribute 'datetime' 

Answer 1

あなたはログインしたユーザーをどこにも集めていません！フォームは文書フィールドのみを収集します。

class DocumentForm(forms.ModelForm): 
    class Meta: 
     model = Document 
     fields = ('document',) 

だから、あなたが完全なエラートレースバックを追加することができ、次のコードは、

obj = form.save(commit=False) 
obj.user = request.user 
obj.save() 

Answer 2

ので、あなたのコマンドのいずれかが

today_date = datetime.today().date() 

か、単に

にご importに関する記述を更新する必要がありますようです