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POReverse for '''' with arguments '()' and keyword arguments '{}' not found
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copied!<p>Please help. I'm getting this error: </p> <blockquote> <p>Reverse for ''ev_toggle_attendance'' with arguments '()' and keyword arguments '{}' not found.</p> </blockquote> <p>Here's my html file:</p> <pre><code> {% extends "base.html" %} {% block title %}Tonight - {{ block.super }}{% endblock %} {% block main_content %} <a href ="{% url ev_create %}">Create an Event</a> {% if events %} {% for event, attending in events %} <p>{{event.creator.username}}: {{event.description}}</p> {% if attending %} <p> You are attending this event.</p> {% else %} <p> You are not attending this event. </p> {% endif %} <form method="POST" class="toggle_attendance_form" action="{% url ev_toggle_attendance %}"> <input type="hidden" name="event_id" value="{{event.id}}"/> {% if attending %} <input class="attendance unattend" type="submit" value="Unattend"/> {% else %} <input class="attendance attend" type="submit" value="Attend"/> {% endif %} </form> {% endfor %} {% else %} <p>No events for today.</p> {% endif %} {% endblock %} </code></pre> <p>It says the error is here: </p> <pre><code><form method="POST" class="toggle_attendance_form" action="{% url ev_toggle_attendance %}"> </code></pre> <p>urls.py file:</p> <pre><code>from django.conf.urls import patterns, include, url from events import views urlpatterns = patterns('', url(r'^create/$', views.create, name='ev_create'), url(r'^tonight/$', views.tonight, name='ev_tonight'), #ev_tonight is the name of the url pattern; good for templates url(r'^toggle-attendance/$', views.toggle_attendance, name='ev_toggle_attendance'), ) </code></pre> <p>views.py snippet:</p> <pre><code>from events.models import Event, Attendance from django.shortcuts import render_to_response, get_object_or_404 from django.template import RequestContext from events.forms import EventForm from dateutil.parser import parse from django.core.urlresolvers import reverse from django.http import HttpResponseRedirect, Http404 from django.contrib import messages from django.contrib.auth.decorators import login_required # Create your views here. def tonight(request): events = Event.objects.today().filter(latest=True) #loop thru all the events and check to see if the currently logged in user is attending the event attending=[] for event in events: #for every event in all the events, query for an attendance objects that matches event for the user try: Attendance.objects.get(event=event, user=request.user) attending.append(True) except Attendance.DoesNotExist: #if can't find it attending.append(False) context = { 'events':zip(events, attending), #zip function to merge event and attending } return render_to_response('events/tonight.html', context, context_instance=RequestContext(request) ) #context_instance: context processors: things that get run on request and add context to it; does things like adding the user variable to the template. def create(request): form = EventForm(request.POST or None) if form.is_valid():#check if there's data as well as within the 340 characters limit event = form.save(commit = False) #won't save to database coz creator isn't yet known event.creator = request.user guessed_date = None for word in event.description.split(): #split on every space - guess the date based on things inside the description try: guessed_date = parse(word) break#if found, break except ValueError: continue event.start_date = guessed_date event.save() #saves to the database messages.add_message(request, messages.INFO, 'Your event was posted.') #redirect user to another url if 'next' in request.POST: #if somewhere in the post value, there's a next next = request.POST['next'] else: next = reverse('ev_tonight') #otherwise, next will be the url with ev_tonight return HttpResponseRedirect(next) #if the form isn't valid return render_to_response( 'events/create.html', {'form':form}, context_instance = RequestContext(request)) create = login_required(create) #ensuring that the user logged in or can do @login_required before the create model(python >= 2.4) def toggle_attendance(request): try: event_id = int(request.POST['event_id'])#assuming there are values in the post parameter; cast into an it except (KeyError, ValueError): #raise an exception when: no event id in the post parameter or a value that could not be cast to an int raise Http404 event = get_object_or_404(Event, id=event_id) attendance, created = Attendance.objects.get_or_create(user=request.user, event=event)#calling for the user that is logged in and for the event that has already been queried for if created: messages.add_message(request, messages.INFO, 'You are now attending "%s"' %event) else: attendance.delete() messages.add_message(request, messages.INFO, 'You are no longer attending "%s"' %event) #checking to see if there's a next variable in the post parameter; if it isn't assign an empty string next=request.POST.get('next', '') if not next: #if it's the empty string next=reverse('ev_tonight') return HttpResponseRedirect(next) toggle_attendance = login_required(toggle_attendance) </code></pre> <p>main url file:</p> <pre><code>from django.conf.urls import patterns, include, url # Uncomment the next two lines to enable the admin: from django.contrib import admin admin.autodiscover() urlpatterns = patterns('', url(r'^events/', include('events.urls')), # Uncomment the next line to enable the admin: url(r'^admin/', include(admin.site.urls)), ) </code></pre> <p>Any assistance that can be rendered is much appreciated.</p> <p>thanks.</p>

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