Django: NoReverseMatch Fehler production_id: None

Question

Mit einem Problem, wo ich das Formular ausfüllen würde und wenn ich zum Speichern der Eingabe klicken, würde es die Informationen in die query übergeben würde aber meineWert würde als None zurückgeben. Hier

ist der Fehler:

Environment: 


Request Method: POST 
Request URL: http://192.168.33.10:8000/podfunnel/episodeinfo/ 

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/pod_funnel.py" in post 
    601.    return HttpResponseRedirect(reverse('podfunnel:episodeimagefiles', kwargs={'production_id':production_id})) 

File "/usr/local/lib/python2.7/dist-packages/django/core/urlresolvers.py" in reverse 
    600.  return force_text(iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))) 

File "/usr/local/lib/python2.7/dist-packages/django/core/urlresolvers.py" in _reverse_with_prefix 
    508.        (lookup_view_s, args, kwargs, len(patterns), patterns)) 

Exception Type: NoReverseMatch at /podfunnel/episodeinfo/ 
Exception Value: Reverse for 'episodeimagefiles' with arguments '()' and keyword arguments '{'production_id': None}' not found. 1 pattern(s) tried: [u'podfunnel/episodeimagefiles/(?P<production_id>[0-9]+)/$'] 

Hier ist meine pod_funnel.py Ansicht:

from django.http import HttpResponseRedirect, Http404, HttpResponseForbidden 
from django.shortcuts import render, get_object_or_404 
from django.views.generic import View, RedirectView, TemplateView 
from django.contrib.auth.decorators import login_required 
from django.contrib.auth.mixins import LoginRequiredMixin 

from .forms.client_setup import ClientSetupForm 
from .forms.podcast_setup import PodcastSetupForm 
from .forms.episode_info import EpisodeInfoForm 
from .forms.image_files import EpisodeImageFilesForm 
from .forms.wordpress_info import EpisodeWordpressInfoForm 
from .forms.chapter_marks import EpisodeChapterMarksForm 
from .forms.show_links import ShowLinksForm 
from .forms.tweetables import TweetablesForm 
from .forms.clicktotweet import ClickToTweetForm 
from .forms.schedule import ScheduleForm 
from .forms.wordpress_account import WordpressAccountForm 
from .forms.wordpress_account_setup import WordpressAccountSetupForm 
from .forms.wordpress_account_sortable import WordpressAccountSortableForm 
from .forms.soundcloud_account import SoundcloudAccountForm 
from .forms.twitter_account import TwitterAccountForm 
from producer.helpers import get_podfunnel_client_and_podcast_for_user 
from producer.helpers.soundcloud_api import SoundcloudAPI 
from producer.helpers.twitter import TwitterAPI 

from django.conf import settings 
from producer.models import Client, Production, ChapterMark, ProductionLink, ProductionTweet, Podcast, WordpressConfig, Credentials, WordPressSortableSection, \ 
    TwitterConfig, SoundcloudConfig 

from django.core.urlresolvers import reverse 
from producer.tasks.auphonic import update_or_create_preset_for_podcast 

class EpisodeInfoView(LoginRequiredMixin, View): 
    form_class = EpisodeInfoForm 
    template_name = 'pod_funnel/forms_episode_info.html' 

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

     # Lets get client and podcast for the user already. if not existent raise 404 
     client, podcast = get_podfunnel_client_and_podcast_for_user(user) 
     if client is None or podcast is None: 
      raise Http404 

     # See if a production_id is passed on the kwargs, if so, retrieve and fill current data. 
     # if not just provide empty form since will be new. 
     production_id = kwargs.get('production_id', None) 

     if production_id: 
      production = get_object_or_404(Production, id=production_id) 

      # Ensure this production belongs to this user, if not Unauthorized, 403 
      if production.podcast_id != podcast.id: 
       return HttpResponseForbidden() 

      initial_values['production_id'] = production.id 
      initial_values['episode_number'] = production.episode_number 
      initial_values['episode_title'] = production.episode_title 
      initial_values['episode_guest_first_name'] = production.episode_guest_first_name 
      initial_values['episode_guest_last_name'] = production.episode_guest_last_name 
      initial_values['episode_guest_twitter_name'] = production.episode_guest_twitter_name 
      initial_values['episode_summary'] = production.episode_summary 

     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_podfunnel_client_and_podcast_for_user(request.user) 

     if form.is_valid(): 
      # lets get the data 
      production_id = form.cleaned_data.get('production_id') 
      episode_number = form.cleaned_data.get('episode_number') 
      episode_title = form.cleaned_data.get('episode_title') 
      episode_guest_first_name = form.cleaned_data.get('episode_guest_first_name') 
      episode_guest_last_name = form.cleaned_data.get('episode_guest_last_name') 
      episode_guest_twitter_name = form.cleaned_data.get('episode_guest_twitter_name') 
      episode_summary = form.cleaned_data.get('episode_summary') 

      #if a production existed, we update, if not we create 
      if production_id is not None: 
       production = Production.objects.get(id=production_id) 
      else: 
       production = Production(podcast=podcast) 

      production.episode_number = episode_number 
      production.episode_title = episode_title 
      production.episode_guest_first_name = episode_guest_first_name 
      production.episode_guest_last_name = episode_guest_last_name 
      production.episode_guest_twitter_name = episode_guest_twitter_name 
      production.episode_summary = episode_summary 
      production.save() 

      return HttpResponseRedirect(reverse('podfunnel:episodeimagefiles', kwargs={'production_id':production_id})) 

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

episode_info.py Form:

from django import forms 

class EpisodeInfoForm(forms.Form): 

    production_id = forms.IntegerField(widget=forms.Field.hidden_widget, required=False) 
    episode_number = forms.IntegerField(widget=forms.NumberInput, required=True) 
    episode_title = forms.CharField(max_length=255, required=True) 
    episode_guest_first_name = forms.CharField(max_length=128) 
    episode_guest_last_name = forms.CharField(max_length=128) 
    episode_guest_twitter_name = forms.CharField(max_length=64) 
    episode_summary = forms.CharField(widget=forms.Textarea) 

Und url.py:

from django.conf.urls import url 
from django.views.generic import TemplateView 

import producer.views.pod_funnel as views 

urlpatterns = [ 
    url(r'^dashboard/', views.dashboard, name="dashboard"), 
    url(r'^clientsetup/', views.ClientSetupView.as_view(), name="clientsetup"), 
    url(r'^podcastsetup/', views.PodcastSetupView.as_view(), name="podcastsetup"), 
    url(r'^episodeinfo/$', views.EpisodeInfoView.as_view(), name="episodeinfo"), 
    url(r'^episodeinfo/(?P<production_id>[0-9]+)/$', views.EpisodeInfoView.as_view(), name="episodeinfo_edit"), 
    url(r'^episodeimagefiles/(?P<production_id>[0-9]+)/$', views.EpisodeImageFilesView.as_view(), name="episodeimagefiles"), 

Jeder Vorschlag würde geschätzt.

Answer 1

sehen

Es sieht aus wie production_id kann None in Ihrer Ansicht sein, in diesem Fall können Sie es nicht verwenden, wenn Sie umgekehrt aufrufen. Es wäre besser, stattdessen production.id zu verwenden. Sie haben gerade die Produktion in Ihrer Ansicht gespeichert, so dass production.id gesetzt wird.

return HttpResponseRedirect(reverse('podfunnel:episodeimagefiles', kwargs={'production_id':production.id})) 

Beachten Sie, dass diese Zeile unter Verwendung der redirect Verknüpfung vereinfachen kann. Fügen Sie den Import,

from django.shortcuts import redirect 

dann die Zeile zu

return redirect('podfunnel:episodeimagefiles', production_id=production.id) 

Answer 2

Sie können nicht immer auf episodeimagefiles umleiten, wenn Sie nicht geeigneten Anfangswert für production_id vorsah:

# See if a production_id is passed on the kwargs, if so, retrieve and fill current data. 
    # if not just provide empty form since will be new. 
    production_id = kwargs.get('production_id', None) <-- here you set production_id variable to None if no `production_id` in kwargs 

Blick auf Ihre Ausnahme:

Exception Value: Reverse for 'episodeimagefiles' with arguments '()' and keyword arguments '{'production_id': None}' not found. 1 pattern(s) tried: [u'podfunnel/episodeimagefiles/(?P<production_id>[0-9]+)/$'] 

Es heißt, Sie None Wert übergeben für production_id Variable, aber episodeimagefiles Muster benötigt einige int-Wert zum Auflösen von URL, so dass es NoReverseMatch Ausnahme auslöst.

Ihre Form ist gültig in EpisodeInfoView.post weil Sie required=False für production_id Attribut in dem Formular gesetzt:

class EpisodeInfoForm(forms.Form): 

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

Ich denke, wenn Sie Ihre generierten Formular debuggen, bevor sie senden, können Sie so etwas wie <input type="hidden" name="production_id" value="None" />