tag urls please help!

[sofutou...@gmail.com]

I have a problem. i cant sent a right url when clicked on a tag link. it always show 404 error pages. please help. sorry for my english.

my index.html

<section>
        <ul>
            <li>Tags:
                {% for menu in menu %}
                    {% for tag in menu.tags.all %}
                       <a href="{{ siteUrl }}tags/{{ tag }}">{{ tag }}</a>
                    {% endfor %}
                {% endfor %}
            </li>
        </ul>

</section>

when i click on a tag, it will link like .../tags/<tag>. but it shown 404 page not found.

urls.py

from django.urls import path
from . import views
from .views import TagListView, FoodListView

urlpatterns = [
    path('', views.index),
    path(r'^tags/(?P<tag>[-\w]+)/$', FoodListView.as_view(), name="menu_list"),
    path(r'^tags/(?P<slug>[a-z0-9_-]+)', TagListView.as_view(), name="tag-list",)
]

and views.py

from django.http import  HttpResponse
from django.shortcuts import render
from django.views.generic import ListView
from .models import Menu
from taggit.models import Tag
from django.shortcuts import render, get_object_or_404


def index(request):
    menu = Menu.objects.all()
    return render(request, 'index.html', {'menu': menu})


class FoodListView(ListView):
    template_name = "list.html"
    context_object_name = "food"


class TagListView(ListView):
    template_name = "list.html"

    def get_queryset(self):
        return Menu.objects.filter(tags__slug=self.kwargs.get("slug")).all()

    def get_context_data(self, **kwargs):
        context = super(TagListView, self).get_context_data(**kwargs)
        context["tag"] = self.kwargs.get("slug")
        return context