Django没有与参数反向匹配

Question

从我的模板:

<a href="{% url 'tracker:othermonth' year next_month %}">July</a>

网址格式:

url(r'^ocal/$', views.calendar, name = "othermonth"),

视图:

def calendar(request, year, month):
    my_year = int(year)
    my_month = int(month)
    my_calendar_from_month = datetime(my_year, my_month, 1)
    my_calendar_to_month = datetime(my_year, my_month, monthrange(my_year, my_month)[1])

    my_tickets = Event.objects.filter(on_sale__gte=my_calendar_from_month).filter(on_sale__lte=my_calendar_to_month)

    my_previous_year = my_year
    my_previous_month = my_month - 1
    if my_previous_month == 0:
        my_previous_year = my_year - 1
        my_previous_month = 12
    my_next_year = my_year
    my_next_month = my_month + 1
    if my_next_month == 13:
        my_next_year = my_year + 1
        my_next_month = 1
    my_year_after_this = my_year + 1
    my_year_before_this = my_year - 1

    cal = TicketCalendar(my_tickets).formatmonth(year, month)

    return render_to_response('calendar.html', {'events_list': my_tickets,
                                                'calendar': mark_safe(cal),
                                                'month': my_month,
                                                'month_name': named_month(my_month),
                                                'year': my_year,
                                                'previous_month': my_previous_month,
                                                'previous_month_name': named_month(my_previous_month),
                                                'previous_year': my_previous_year,
                                                'next_month': my_next_month,
                                                'next_month_name': named_month(my_next_month),
                                                'next_year': my_next_year,
                                                'year_before_this': my_year_before_this,
                                                'year_after_this': my_year_after_this,
    }, context_instance=RequestContext(request))

错误:

Reverse for 'othermonth' with arguments '(2013, 7)' and keyword arguments '{}' not found.

我搜索了stackoverflow和django文档,但我似乎无法弄清楚为什么我收到此NoReverseMatch错误.我确信这对我来说是一个非常简单的疏忽,因为我正在盯着前一个项目的代码,这个代码与此几乎相同,并且工作正常.任何帮助将不胜感激,谢谢.

更新:我尝试删除我尝试使用URL发送的参数,并修复了NoReverseMatch但是调用的视图需要这些参数,因此链接失败.

Answer 1

您如何计划将这些参数嵌入到您的URL中？什么都没有捕获它们,并且没有办法进行反向查找来构建它.您需要一个接受这些参数的URL模式.就像是:

url(r'^ocal/(?P<year>\d{4})/(?P<month>(0|1)?\d)/$', views.calendar, name = "othermonth_bymonth"),

在这里使用关键字而不是位置参数是可选的,但我认为它使事情变得更容易 - 并且允许设置可以触发行为的默认值,例如在没有指定任何内容时显示当天的日历.

此外,您的查询集mytickets也可以这样构造:

mytickets = Event.objects.filter(on_sale__year=year, onsale__month=month)

我认为阅读起来有点清洁.

实际上,仔细看看 - Django内置的基于日期的视图可以为你做很多事情.如果你还没有调查过它们,我建议这样做:

https://docs.djangoproject.com/en/dev/ref/class-based-views/generic-date-based/

对于此特定视图,您需要做的就是MonthArchiveView创建TicketCalendar实例并将其添加到上下文中的子类.

编辑:好的,你仍然遇到问题.这就是我要解决这个问题的方法:

views.py
class TicketMonthArchiveView(MonthArchiveView):
    allow_empty = True # show months even in which no tickets exist
    allow_future = True # show future months
    model = Event

    def get_context_data(self, **kwargs):
        base_context = super(TicketMonthArchiveView, self).get_context_data(**kwargs)
        my_tickets = kwargs['object_list']
        base_context['calendar'] = mark_safe(TicketCalendar(my_tickets).formatmonth(self.get_year(), self.get_month()))
        # the above could be a little off because I don't know exactly how your formatmonth method works
        return base_context

urls.py
    from somewhere.views import TicketMonthArchiveView
    # other patterns, plus:
    url(r'^ocal/(?P<year>\d{4})/(?P<month>(0|1)?\d)/$', TicketMonthArchiveView.as_view(), name='calendar_by_month'),

template event_archive_month.html
    <a href="{% url 'tracker:calendar_by_month' next_month|date:'%Y' next_month|date:'%m' %}">{{ next_month|date:'%f' }}</a>

显然,你可以在这里看到更多年岁和日视图,但这应该展示一般概念.