Django issue - NoReverseMatch

Question

我正在努力扩展 Horizon 以包含自定义应用程序。在该应用程序中，我有一个数据表：

class WorkloadsTable(tables.DataTable):
    name = tables.Column("name", verbose_name=_("Name"))
    description = tables.Column("description", verbose_name=_("Description"))
    image = tables.Column("image", verbose_name=_("Image"))
    flavor = tables.Column("flavor", verbose_name=_("Flavor"))
    class Meta:
        name = "workloads_table"
        verbose_name = _("Workloads Table")
        table_actions = (CreateNewWorkload, DeleteWorkload)
        row_actions = (UpdateWorkload, DeleteWorkload)

它有一个链接操作：

class UpdateWorkload(tables.LinkAction):
    name = "update"
    verbose_name = _("Edit Workload")
    url = "horizon:mydashboard:workloads_panel:update"
    classes = ("ajax-modal",)
    icon = "pencil"
    def get_link_url(self, datum):
        base_url = super(UpdateWorkload, self).get_link_url(datum)
        workload_id = self.table.get_object_id(datum)
        reversed = urlresolvers.reverse(self.url, args=[workload_id])
        print reversed
        return urlresolvers.reverse(self.url, args=[workload_id])

这个链接操作指出了我 urls.py 中的一个溃败：

WORKLOADS = r'(?P<workload_id>[^/]+)/%s$'
urlpatterns = patterns('',
    url(r'^create/$', views.CreateView.as_view(), name='create'),
    url(WORKLOADS % 'update', views.UpdateView.as_view(), name='update'),
    url(r'^$', views.IndexView.as_view(), name='index'),
)

问题是：当我输入以下网址时：

http://localhost:9000/mydashboard/workloads_panel/3/update
I get:  NoReverseMatch: Reverse for 'update' with arguments '()' and keyword arguments '{}' not found. 1 pattern(s) tried: [u'mydashboard/workloads_panel/(?P<workload_id>[^/]+)/update$']

我哪里出错了？

Answer 1

我想您的问题的解决方案在于您必须将URL包含在_update.html中，

{% block form_action %}
{% url 'horizon:mydashboard:workloads_panel:update' workload.id  %}
{% endblock %}

虽然 workload.id 是你在函数 views.py get_context_data中得到的对象 ID：

def get_context_data(self, **kwargs):
    context = super(## the class name ##, self).get_context_data(**kwargs)
    try:
        context['workload'] = ##your API call ##(self.request,
                                                self.kwargs['id'])
    except Exception:
        exceptions.handle(self.request)
    return context

也许这将帮助您解决错误。

Answer 2

现在答案很简单。此反向调用没有匹配的 URL：

{% url 'horizon:mydashboard:workloads_panel:update' %}

update命名的 URL 模式需要与您的正则表达式[^/]+匹配的有效workload_id参数