AttributeError: объект 'int' не имеет атрибута 'start_time'

Question

У меня есть ChapterMarks класс в моем models.py с внешним ключом, который исходит от Production класса. Я пытаюсь использовать информацию, которую я отправляю в ChapterMarks в моем views.py, чтобы пользователь мог продолжить установку эпизода. В этом разделе требуется, чтобы пользователь мог вводить время начала для каждого из своих разделов в своем подкасте, чтобы клиент мог щелкнуть и отнести их к определенным отметкам времени. Проблема в том, я получаю следующее AttributeError:

Environment: 


Request Method: GET 
Request URL: http://192.168.33.10:8000/fc/episodechaptermarks/ 

Django Version: 1.9 
Python Version: 2.7.6 
Installed Applications: 
('producer', 
'django.contrib.admin', 
'django.contrib.sites', 
'registration', 
'django.contrib.auth', 
'django.contrib.contenttypes', 
'django.contrib.sessions', 
'django.contrib.messages', 
'django.contrib.staticfiles', 
'storages', 
'django_extensions', 
'randomslugfield', 
'adminsortable2', 
'crispy_forms') 
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', 
'django.middleware.security.SecurityMiddleware') 



Traceback: 

File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response 
    149.      response = self.process_exception_by_middleware(e, request) 

File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response 
    147.      response = wrapped_callback(request, *callback_args, **callback_kwargs) 

File "/usr/local/lib/python2.7/dist-packages/django/views/generic/base.py" in view 
    68.    return self.dispatch(request, *args, **kwargs) 

File "/usr/local/lib/python2.7/dist-packages/django/contrib/auth/mixins.py" in dispatch 
    56.   return super(LoginRequiredMixin, self).dispatch(request, *args, **kwargs) 

File "/usr/local/lib/python2.7/dist-packages/django/views/generic/base.py" in dispatch 
    88.   return handler(request, *args, **kwargs) 

File "/home/vagrant/fullcast_project/producer/views/views.py" in get 
    738.    initial_values['start_time'] = chaptermark.start_time 

Exception Type: AttributeError at /fc/episodechaptermarks/ 
Exception Value: 'int' object has no attribute 'start_time' 

Ошибка находится под get метода в моем ChapterMarks классе в views.py:initial_values['start_time'] = chaptermark.start_time

Любое предложение приветствовать

Вот мой ChapterMarks класс в views.py:

class EpisodeChapterMarksView(LoginRequiredMixin, View): 
    form_class = EpisodeChapterMarksForm 
    template_name = 'fc/forms_chapter_marks.html' 

    def get(self, request, *args, **kwargs): 
     initial_values = {} 
     user = request.user 


     client, podcast = get_fc_client_and_podcast_for_user(user) 
     if client is None or podcast is None: 
      raise Http404 

     production = Production.objects.filter(podcast=podcast).first() 

     if production is None: 
      raise Http404 

     initial_values['production_id'] = production.id 
     chaptermark_id = production.id 

     if chaptermark_id is not None: 
      chaptermark = production.id 
      initial_values['chaptermark_id'] = chaptermark_id 
      initial_values['start_time'] = chaptermark.start_time 
      initial_values['title'] = chaptermark.title 

     form = self.form_class(initial=initial_values) 
     return render(request, self.template_name, {'form': form}) 

    def post(self, request, *args, **kwargs): 
     form = self.form_class(request.POST) 

     client, podcast = get_fc_client_and_podcast_for_user(request.user) 

     if form.is_valid(): 
      # lets get the data 
      production_id = form.cleaned_data.get('production_id') 
      chaptermark_id = form.cleaned_data.get('chaptermark_id') 
      start_time = form.cleaned_data.get('start_time') 
      title = form.cleaned_data.get('title') 

      # Get production 
      production = get_object_or_404(Production, id=production_id) 

      # if a chaptermark existed, we update, if not we create 
      if chaptermark_id is not None: 
       chaptermark = ChapterMark.objects.get(id=chaptermark_id) 
      else: 
       chaptermark = ChapterMark() 

      chaptermark.start_time = start_time 
      chaptermark.title = title 
      chaptermark.save() 

      production.chapter_mark = chaptermark 
      production.save() 

      # TODO: Needs to redirect to next step 
      return HttpResponseRedirect(reverse('fc:episodeshowlinks')) 

     return render(request, self.template_name, {'form': form}) 

Production и ChapterMark класс в моем models.py:

class Production(TimeStampedModel): 
    BASE_PRODUCTION = 'B' 
    SECONDARY_PRODUCTION = 'S' 

    podcast = models.ForeignKey(Podcast, on_delete=models.SET_NULL, null=True) 
    ready_for_production = models.BooleanField(default=False) 

    episode_number = models.PositiveIntegerField(null=True) 
    episode_title = models.CharField(max_length=255) 
    episode_guest_last_name = models.CharField(max_length=128, null=True, blank=True) 
    episode_guest_first_name = models.CharField(max_length=128, null=True, blank=True) 
    episode_guest_twitter_name = models.CharField(max_length=64, null=True, blank=True) 
    episode_summary = models.TextField(blank=False, null=True) 

    base_production_uuid = models.CharField(max_length=32, null=True, blank=True) 
    base_production_status = models.CharField(max_length=255, blank=True) 
    base_production_produced = models.BooleanField(default=False) 
    base_production_started = models.BooleanField(default=False) 
    base_production_cover_image = models.CharField(max_length=255, null=True) 
    square_image_file = models.FileField(null=True, blank=True) 

    secondary_production_uuid = models.CharField(max_length=32, null=True, blank=True) 
    secondary_production_status = models.CharField(max_length=255, blank=True) 
    secondary_production_produced = models.BooleanField(default=False) 
    secondary_production_started = models.BooleanField(default=False) 
    secondary_production_cover_image = models.CharField(max_length=255, null=True) 
    banner_image_file = models.FileField(null=True, blank=True) 

    auphonic_result_url = models.URLField(null=True, blank=True) 
    soundcloud_result_url = models.URLField(null=True, blank=True) 
    youtube_result_url = models.URLField(null=True, blank=True) 
    libsyn_result_url = models.URLField(null=True, blank=True) 
    spreaker_result_id = models.PositiveIntegerField(null=True) 
    spreaker_result_id_request_attempted = models.BooleanField(default=False) 

    source_file_name = models.CharField(max_length=64, null=True) 
    source_file_image = models.FileField(null=True, blank=True) 
    output_base_name = models.CharField(max_length=64, null=True) 

    scheduled_date = models.DateTimeField(null=True, blank=True) 
    fully_produced_date = models.DateTimeField(null=True, blank=True) 
    auto_email_sent = models.BooleanField(default=False) 

    post_to_wordpress = models.BooleanField(default=True) 
    wordpress_post_id = models.PositiveIntegerField(null=True) 
    wordpress_slug = models.CharField(max_length=127, null=True, blank=True) 
    wordpress_url = models.URLField(null=True, blank=True) 
    wordpress_short_url = models.URLField(null=True, blank=True) 
    wordpress_featured_image = models.CharField(max_length=255, null=True, blank=True) 
    wordpress_featured_image_upload = models.FileField(null=True, blank=True) 
    wordpress_post_unique_tags = models.TextField(null=True, blank=True) 
    wordpress_posting_failure_notified = models.BooleanField(default=False) 

    transcription_url = models.URLField(null=True, blank=True) 

    tweets_already_scheduled = models.BooleanField(default=False) 
    number_of_refresh_tweets = models.PositiveIntegerField(default=0) 
    tweets_scheduling_failure_notified = models.BooleanField(default=False) 

    def __unicode__(self): 
     return smart_text(self.base_production_episode_title()) 

    def fully_produced(self): 
     return self.base_production_produced and self.secondary_production_produced 
    fully_produced.short_description = 'Produced' 

    def status(self): 
     if not self.fully_produced(): 
      return 'Pending' 
     if self.wordpress_url: 
      return 'Published' 
     return 'Produced' 

    def episode(self): 
     return self.episode_number 

    def base_production_episode_title(self): 
     return self._title_string_for_format(self.podcast.base_production_name_format) 

    def secondary_production_episode_title(self): 
     return self._title_string_for_format(self.podcast.secondary_production_name_format) 

    def _title_string_for_format(self, title_format): 
     from producer.helpers import replace_placeholder_in_text_format_with_parameter 

     guest_name = self.episode_guest() 
     episode_number = str(self.episode_number).zfill(3) 
     episode_title = self.episode_title 

     title = replace_placeholder_in_text_format_with_parameter(title_format, 'EPISODE_GUEST_FULL_NAME', guest_name) 
     title = replace_placeholder_in_text_format_with_parameter(title, 'EPISODE_NUMBER', episode_number) 
     title = replace_placeholder_in_text_format_with_parameter(title, 'EPISODE_TITLE', episode_title) 

     return title 

    def episode_guest(self): 
     if self.episode_guest_last_name and self.episode_guest_first_name: 
      return '%s %s' % (self.episode_guest_first_name, self.episode_guest_last_name) 

     if self.episode_guest_last_name: 
      return self.episode_guest_last_name 

     if self.episode_guest_first_name: 
      return self.episode_guest_first_name 

     return '' 

--------------------------- ----------------------

class ChapterMark(TimeStampedModel): 
production = models.ForeignKey(Production) 
start_time = models.TimeField() 
title = models.CharField(max_length=200) 
url = models.URLField(blank=True) 
image_name = models.CharField(max_length=60, blank=True) 

def start_time_string(self): 
    return self.start_time.strftime('%H:%M:%S') 

def wordpress_start_time_string(self): 
    string = self.chapter_timestamp() 
    return string if string else '-:-' 

def link(self): 
    if self.url: 
     return '<a href="%s" target="_blank">%s</a>' % (self.url, self.url) 
    return 
link.allow_tags = True 

def __unicode__(self): 
    return u'' 

def chapter_timestamp(self): 
    if self.start_time: 
     if self.start_time.hour > 0: 
      return self.start_time.strftime('%H:%M:%S') 
     return self.start_time.strftime('%M:%S') 
    return 

chapter_marks.py форма:

from django import forms 

class EpisodeChapterMarksForm(forms.Form): 

    production_id = forms.IntegerField(widget=forms.Field.hidden_widget, required=False) 

    id = forms.IntegerField(widget=forms.Field.hidden_widget) 

    chaptermark_id = forms.IntegerField(widget=forms.Field.hidden_widget, required=False) 
    start_time = forms.TimeField() 
    title = forms.CharField(max_length=200) 

------------- UPDATE -------------

Новая ошибка:

Environment: 


Request Method: GET 
Request URL: http://192.168.33.10:8000/fc/episodechaptermarks/ 

Django Version: 1.9 
Python Version: 2.7.6 
Installed Applications: 
('producer', 
'django.contrib.admin', 
'django.contrib.sites', 
'registration', 
'django.contrib.auth', 
'django.contrib.contenttypes', 
'django.contrib.sessions', 
'django.contrib.messages', 
'django.contrib.staticfiles', 
'storages', 
'django_extensions', 
'randomslugfield', 
'adminsortable2', 
'crispy_forms') 
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', 
'django.middleware.security.SecurityMiddleware') 



Traceback: 

File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response 
    149.      response = self.process_exception_by_middleware(e, request) 

File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response 
    147.      response = wrapped_callback(request, *callback_args, **callback_kwargs) 

File "/usr/local/lib/python2.7/dist-packages/django/views/generic/base.py" in view 
    68.    return self.dispatch(request, *args, **kwargs) 

File "/usr/local/lib/python2.7/dist-packages/django/contrib/auth/mixins.py" in dispatch 
    56.   return super(LoginRequiredMixin, self).dispatch(request, *args, **kwargs) 

File "/usr/local/lib/python2.7/dist-packages/django/views/generic/base.py" in dispatch 
    88.   return handler(request, *args, **kwargs) 

File "/home/vagrant/fullcast_project/producer/views/views.py" in get 
    738.    chaptermark = production.chaptermark_set.get(id=chaptermark_id).id 

File "/usr/local/lib/python2.7/dist-packages/django/db/models/manager.py" in manager_method 
    122.     return getattr(self.get_queryset(), name)(*args, **kwargs) 

File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py" in get 
    387.     self.model._meta.object_name 

Exception Type: DoesNotExist at /fc/episodechaptermarks/ 
Exception Value: ChapterMark matching query does not exist. 

Answer 1

изменение

chaptermark = production.chapter_mark 

в

chaptermark = production.chaptermark_set.get(id=chaptermark_id) 

Answer 2

в версии doniyor вам необходимо сделать

chaptermark = production.chaptermark_set.get(id=chaptermark_id) 
chaptermark.start_time 

и вы получите это значение. Если вы хотите, чтобы получить значение в одном шаге start_time вы можете попробовать

chaptermark = production.chaptermark_set.values('start_time')[0]['start_time'] 

Пожалуйста, обратите внимание, что у вас есть такая же проблема со вторым атрибутом - «заголовка»

Answer 3

Давайте попробуем понять код:

def get(self, request, *args, **kwargs): 
    initial_values = {} 
    user = request.user 

    client, podcast = get_fc_client_and_podcast_for_user(user) 
    if client is None or podcast is None: 
     raise Http404 

до сих пор так хорошо ...

production = Production.objects.filter(podcast=podcast).first() 

это странно, почему вы выбрали первый Production для конкретного подкаста ...если у вас есть 1-к-1, то используйте OneToOneField, если у вас есть 1-ко-многим - должно быть что-то, чтобы ограничить выбор Production или вы должны вернуть список всех Production, прикрепленных к подкасту - так вот что-то шаткое

if production is None: 
     raise Http404 

нормально, но есть "магия" get_object_or_404 ярлык ...

initial_values['production_id'] = production.id 
    chaptermark_id = production.id 

    if chaptermark_id is not None: 
     chaptermark = production.id 

ок ... вы назначив int значение chaptermark

 initial_values['chaptermark_id'] = chaptermark_id 
     initial_values['start_time'] = chaptermark.start_time 
     initial_values['title'] = chaptermark.title 

эти две линии пытаются получить свойства chaptermark, но chaptermark - не ваш объект модели, а int - у него нет этих свойств!

так это выглядит, как вы должны назначить (ранее), чтобы chaptermark экземпляр ChapterMark, однако ... Production может иметь кратна ChapterMark сек ... так, который ChapterMark вы хотите увидеть?

Это выглядит как еще один серьезный поток, потому что у вас здесь 1-ко-многим, и это может быть представлено в Form, но в качестве зависимого FormSet - со списком знаков главы.

Таким образом, существуют фундаментальные ошибки в вашем подходе!