尝试访问登录页面时出现上述错误。

我想念什么？

追踪

NoReverseMatch at /
Reverse for 'fleet' not found. 'fleet' is not a valid view function or pattern name.
Request Method: GET
Request URL:    http://127.0.0.1:8000/
Django Version: 2.2.6
Exception Type: NoReverseMatch
Exception Value:    
Reverse for 'fleet' not found. 'fleet' is not a valid view function or pattern name.

这是base.html代码

<button>
  `<a href="{% url 'trucks:fleet' %}"> Fleet Admin </a>
</button>

及以下是应用程序的urls.py文件

from django.urls import path

from .admin import fleet_admin_site

app_name = 'trucks'

urlpatterns = [
  path('fleet/',fleet_admin_site.urls,name="fleet"),]

和主要的urls.py文件

from django.contrib import admin
from django.urls import path,include,reverse

from django.views.generic import TemplateView


urlpatterns = [
  path('admin/',include('workers.urls')),path('admin/',include('trucks.urls')),path('',TemplateView.as_view(template_name='base.html')),]

admin.py文件

class FleetadminSite(admin.AdminSite):
  site_header = ''
  site_title = ''
  index_title = ''


fleet_admin_site = FleetadminSite(name='fleet_admin')