我有网址，而且每个人都应该没问题，但我收到错误。
这是我的网址：
url(r'^/(?P<genre>%s)$' % '|'.join([g.code for g in Genre.objects.all()]), EventListView.as_view(), name='genre'),
以下是错误消息：
Reverse for 'genre' with arguments '()' and keyword arguments '{u'genre': ''}' not found. 0 pattern(s) tried: []
在这行HTML代码中：
<a {% if genre == view.genre %} class="active" href="{% url 'events' %}" title="{% trans 'Reset Filter' %}"{% else %} href="{% url 'genre' genre=genre.code %}"{% endif %}>{{ genre.name }}</a>
我的观点：
class EventListView(PageContextMixin, ListView):
model = Booking
page_context_kwargs = {'selected': reverse_lazy('events')}
template_name = 'events/event_list.html'
def get_queryset(self):
filter_ = {'eventlist': True} # , 'season__in': settings.EVENTS_SEASONS}
self.rooms = settings.EVENTS_ROOMS
self.genres = list(settings.EVENTS_GENRES)
genre_names = dict([(g.evis_id, g.description_de) for g in Genre.objects.filter(evis_id__in=[g['evis_id'] for g in self.genres])])
for genre in self.genres:
genre['name'] = genre_names.get(genre['evis_id'], genre['name'])
if 'genre' in self.kwargs:
self.genre = [g for g in self.genres
if g['url'] == self.kwargs['genre']][0]
filter_['eventgenre__genre__evis_id'] = self.genre['evis_id']
elif 'room' in self.kwargs:
self.room = [r for r in self.rooms if r['url'] == self.kwargs['room']][0]
filter_['venue_description'] = self.room['venue_description']
return self.model.objects.filter(**filter_)
HTML模板：
<div id="eventlistcontainer">
{% if view.genres or view.rooms %}
<input type="checkbox" id="filteropener" class="hidden-input" />
<div class="filterwrap">
<label for="filteropener" class="filterlabel" title="{% trans "Toggle Filter" %}">{% trans "Filter" %}</label>
{% if view.genre or view.room %}
<span class="filtertag">
: <b>{% if view.genre %}{{ view.genre.name }}{% else %}{{ view.room.name }}{% endif %}</b>
</span>
<a class="filterreset" href="{% url 'events' %}" title="{% trans 'Reset Filter' %}">
<img src="{{ STATIC_URL }}images/icon_close.png" alt="{% trans 'Reset Filter' %}" />
</a>
{% endif %}
</div>
<div class="eventfilter">
<div>
<h2>{% trans "Genre" %}</h2>
<ul class="linklist list1">
{% for genre in view.genres %}
<li>
<a {% if genre == view.genre %} class="active" href="{% url 'events' %}" title="{% trans 'Reset Filter' %}"{% else %} href="{% url 'genre' genre=genre.code %}"{% endif %}>{{ genre.name }}</a>
</li>
{% if forloop.counter == 4 %}
</ul>
<ul class="linklist list2">
{% endif %}
{% endfor %}
</ul>
</div>
<div>
<h2>{% trans "Concert Venues" %}</h2>
<ul class="linklist list3">
{% for room in view.rooms %}
<li>
<a {% if room == view.room %} class="active" href="{% url 'events' %}" title="{% trans "Reset Filter" %}"{% else %} href="{% url "room" room=room.url %}"{% endif %}>{{ room.name }}</a>
</li>
{% if forloop.counter == 6 %}
</ul>
<ul class="linklist list4">
{% endif %}
{% endfor %}
</ul>
</div>
</div>
{% endif %}
{% with object_list|sort_by_highlight_past as events %}
<ul class="eventlist{% if events.0.past %} past{% endif %}">
{% for event in events %}
{% ifchanged event.past %}
{% if not forloop.first %}
</ul>
<h3>Vergangene Veranstaltungen</h3>
<ul class="eventlist past">
{% endif %}
{% endifchanged %}
<li class="{{ event.status|default:"" }}{% if forloop.first and not event.past %} wide{% endif %}">
{% for im in event.eventimage_set.all|slice:":1" %}
<a href="{{ event.get_absolute_url }}" class="image">
{% if forloop.parentloop.first and not event.past %}
<img src="{{ im.image.image.3.url }}" alt="{{ im.text }}" />
{% endif %}
<img src="{{ im.image.image.2.url }}" alt="{{ im.text }}" />
</a>
{% endfor %}
<div class="textbox">
<a href="{{ event.get_absolute_url }}">
<p class="date">{{ event.start|fancy_date }}</p>
<h2>{{ event.name }}</h2>
<p class="location">{{ event.venue_description }}</p>
</a>
{% if event.description_short %}
<p class="additional-info">{{ event.description_short }}</p>
{% endif %}
<a href="{{ event.get_absolute_url }}" class="button">{% trans "Details" %}</a>
{% if event.status %}
<p class="status">{% trans event.status %}!</p>
{% elif event.selling_status_code == "EF" %}
<a href="{{ event.get_absolute_url }}" class="button">{{ event.selling_status_description }}</a>
{% elif event|ticket_link %}
<a href="{{ event|ticket_link }}" class="button">{% trans "Tickets" %}</a>
{% endif %}
</div>
</li>
{% endfor %}
</ul>
{% endwith %}
</div>
流派
EVENTS_GENRES = (
{
'url': 'orchestermusik',
'evis_id': '1',
'name': 'Orchestermusik'
},
{
'url': 'vokale-musik',
'evis_id': '2',
'name': 'Vokale Musik'
},)
答案 0 :(得分：1)
尝试将所有类型的网址作为选项放入网站是一个非常糟糕的主意。除了其他任何东西，查询只会被评估一次，因此URL只接受已在服务器启动时创建的类型。
相反，这是您在视图中检查的内容，例如get_object_or_404;它具有完全相同的结果，如果该类型不存在则返回404。
但是，在这种特殊情况下，错误是因为您传递给genre.code标记的{% url %}值由于某种原因而为空。但是，如果没有看到模板或视图的其余部分，我们无法告诉您原因。