python之Django，NoReverse 匹配

所以我完成了我的应用程序并且有几个模型。此特定错误仅针对某些值出现。示例:每个用户都注册了一个类(class)和一年。因此，在一个页面中，我试图显示所选年份属于该类(class)的所有模块。当用户在 year 3 学习时，它可以工作。当它是 第 2 年 时，它会抛出该错误。

Reverse for 'module_details_upcoming' with arguments '(10L,)' and keyword arguments '{}' not found. 1 pattern(s) tried: ['studies/module/(?P<module_id>\\d)/upcoming/$'] 

在错误页面中它提示 {% url "module_details_upcoming"module.id %} 我猜也是 {% url "module_details_previous"module.id %} .

下面你可以看到我的代码:

View .py

def modules(request): 
    if request.user.is_authenticated(): 
        user_id = request.user.id 
 
        try: 
            studying_course = Student.objects.get(user__id=user_id).course 
            studying_year = Student.objects.get(user__id=user_id).year 
        except Student.DoesNotExist: 
            return HttpResponseRedirect(reverse('step2')) 
 
        try: 
            modules_list = Module.objects.filter(course=studying_course,year=studying_year).exclude(name="school") 
        except Module.DoesNotExist: 
            modules_list = None 
        # import pdb; pdb.set_trace() 
        return render_to_response("studies/modules.html", {'course': studying_course, 'year': studying_year, 'modules': modules_list,},  RequestContext(request)) 
 
    else: 
        return HttpResponseRedirect(reverse('home')) 
 
def module_details_upcoming(request, module_id): 
    if request.user.is_authenticated(): 
        user_id = request.user.id 
        dated = True 
 
        try: 
            studying_course = Student.objects.get(user__id=user_id).course 
            studying_year = Student.objects.get(user__id=user_id).year 
        except Student.DoesNotExist: 
            return HttpResponseRedirect(reverse('step2')) 
 
        try: 
            module = Module.objects.get(id=module_id) 
        except Module.DoesNotExist: 
            module = None 
 
        now = datetime.datetime.now() 
        events = Event.objects.filter(module__in=module_id,date__gte=now).order_by('date') 
 
        paginator = Paginator(events, 5) 
        try: 
            page = int(request.GET.get("page", '1')) 
        except ValueError: 
            page = 1 
 
        try: 
            posts = paginator.page(page) 
        except (InvalidPage, EmptyPage): 
            posts = paginator.page(paginator.num_pages) 
 
        return render_to_response("studies/module.html", {'module': module, 'events': events, 'posts': posts, 'dated': 'dated'},  RequestContext(request)) 
    else: 
        return HttpResponseRedirect(reverse('home')) 

网址.py

urlpatterns = patterns('', 
    url(r'^modules/$', 'studies.views.modules', name="modules"), 
    url(r'^module/(?P<module_id>\d)/upcoming/$', 'studies.views.module_details_upcoming', name="module_details_upcoming"), 
    url(r'^module/(?P<module_id>\d)/previous/$', 'studies.views.module_details_previous', name="module_details_previous"), 
) 

模板文件:

            {% if modules %} 
                <p>Below you can find all your modules for this year.</p> 
                <table class="table table-hover"> 
                    <th>Code</th> 
                    <th>Name</th> 
                    <th>Tasks/Events</th> 
                {% for module in modules %} 
                    <tbody> 
                        <td>{{ module.code }}</td> 
                        <td>{{ module.name }}</td> 
                        <td><a href="{% url "module_details_upcoming" module.id %}">Upcoming</a> / <a href="{% url "module_details_previous" module.id %}">Previous</a></td> 
                    </tbody> 
                {% endfor %} 
                </table> 
            {% else %} 
                <p>Oops! It seems that there are no modules for {{ course.name }} in our records. Please contact your school office.</p> 
            {% endif %} 

请您参考如下方法:

您需要在 url 标签中传递关键字参数 module_id:

{% url "module_details_upcoming" module_id=module.id %} 

也看到这个类似的问题:NoReverseMatch with {% url ... %} and keyword args

UPD:您实际上是在 url 中捕获单个数字。由于 第 3 年 module_id 是 10(两位数)，因此无法完成反向操作。

替换:

url(r'^module/(?P<module_id>\d)/upcoming/$', 'studies.views.module_details_upcoming', name="module_details_upcoming"), 
url(r'^module/(?P<module_id>\d)/previous/$', 'studies.views.module_details_previous', name="module_details_previous"), 

with(观看 \d+ 而不是 \d):

url(r'^module/(?P<module_id>\d+)/upcoming/$', 'studies.views.module_details_upcoming', name="module_details_upcoming"), 
url(r'^module/(?P<module_id>\d+)/previous/$', 'studies.views.module_details_previous', name="module_details_previous"),