Django-找不到“”的反向不是有效的视图函数或模式nam

Environment: Request Method: GET Request URL: http://127.0.0.1:8000/paypal-cancel/ Django Version: 1.11.4 Python Version: 2.7.12 Installed Applications: ['django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'django_forms_bootstrap', 'paypal.standard.ipn', 'home', 'accounts', 'paypal_store', 'products'] Installed Middleware: ['django.middleware.security.SecurityMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.common.CommonMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.clickjacking.XFrameOptionsMiddleware'] Template error: In template C:\Users\irene\Documents\Full-Stack-Developer\Stream3\Project\spss_online\templates\base.html, error at line 10 Reverse for '' not found. '' is not a valid view function or pattern name. 1 : {% load staticfiles %} 2 : <!DOCTYPE html> 3 : <html lang="en"> 4 : <head> 5 : <meta charset="UTF-8"> 6 : <title>Buy SPSS Online</title> 7 : <meta name="viewport" content="width=device-width, initial-scale=1.0"> 8 : <meta name="description" content=""> 9 : <meta name="author" content=""> 10 : <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootswatch/3.3.7/cerulean/bootstrap.min.css"> 11 : <link rel="stylesheet" href="{% static 'css/style.css' %}"> 12 : 13 : 14 : </head> 15 : <body> 16 : <div class="container"> 17 : <div class='container-fluid'> 18 : <nav id="menu" class="navbar navbar-inverse"> 19 : <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar"> 20 : <span class="icon-bar"></span> Traceback: File "C:\Users\irene\virtualenv\spss_online_env\lib\site-packages\django\core\handlers\exception.py" in inner 41. response = get_response(request) File "C:\Users\irene\virtualenv\spss_online_env\lib\site-packages\django\core\handlers\base.py" in _get_response 187. response = self.process_exception_by_middleware(e, request) File "C:\Users\irene\virtualenv\spss_online_env\lib\site-packages\django\core\handlers\base.py" in _get_response 185. response = wrapped_callback(request, *callback_args, **callback_kwargs) File "C:\Users\irene\Documents\Full-Stack-Developer\Stream3\Project\spss_online\paypal_store\views.py" in paypal_cancel 15. return render(request, 'paypal/paypal_cancel.html', args) File "C:\Users\irene\virtualenv\spss_online_env\lib\site-packages\django\shortcuts.py" in render 30. content = loader.render_to_string(template_name, context, request, using=using) File "C:\Users\irene\virtualenv\spss_online_env\lib\site-packages\django\template\loader.py" in render_to_string 68. return template.render(context, request) File "C:\Users\irene\virtualenv\spss_online_env\lib\site-packages\django\template\backends\django.py" in render 66. return self.template.render(context) File "C:\Users\irene\virtualenv\spss_online_env\lib\site-packages\django\template\base.py" in render 207. return self._render(context) File "C:\Users\irene\virtualenv\spss_online_env\lib\site-packages\django\template\base.py" in _render 199. return self.nodelist.render(context) File "C:\Users\irene\virtualenv\spss_online_env\lib\site-packages\django\template\base.py" in render 990. bit = node.render_annotated(context) File "C:\Users\irene\virtualenv\spss_online_env\lib\site-packages\django\template\base.py" in render_annotated 957. return self.render(context) File "C:\Users\irene\virtualenv\spss_online_env\lib\site-packages\django\template\loader_tags.py" in render 177. return compiled_parent._render(context) File "C:\Users\irene\virtualenv\spss_online_env\lib\site-packages\django\template\base.py" in _render 199. return self.nodelist.render(context) File "C:\Users\irene\virtualenv\spss_online_env\lib\site-packages\django\template\base.py" in render 990. bit = node.render_annotated(context) File "C:\Users\irene\virtualenv\spss_online_env\lib\site-packages\django\template\base.py" in render_annotated 957. return self.render(context) File "C:\Users\irene\virtualenv\spss_online_env\lib\site-packages\django\template\loader_tags.py" in render 72. result = block.nodelist.render(context) File "C:\Users\irene\virtualenv\spss_online_env\lib\site-packages\django\template\base.py" in render 990. bit = node.render_annotated(context) File "C:\Users\irene\virtualenv\spss_online_env\lib\site-packages\django\template\base.py" in render_annotated 957. return self.render(context) File "C:\Users\irene\virtualenv\spss_online_env\lib\site-packages\django\template\defaulttags.py" in render 458. url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app) File "C:\Users\irene\virtualenv\spss_online_env\lib\site-packages\django\urls\base.py" in reverse 91. return force_text(iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))) File "C:\Users\irene\virtualenv\spss_online_env\lib\site-packages\django\urls\resolvers.py" in _reverse_with_prefix 497. raise NoReverseMatch(msg) Exception Type: NoReverseMatch at /paypal-cancel/ Exception Value: Reverse for '' not found. '' is not a valid view function or pattern name.

3条回答

网友

1楼 · 编辑于 2024-04-19 23:18:56

修复url.py文件中的urlpatterns

例如，我的应用程序名是“模拟器”

我的login和logout的URL模式看起来像

urlpatterns = [
    ...
    ...
    url(r'^login/$', simulator.views.login_view, name="login"),
    url(r'^logout/$', simulator.views.logout_view, name="logout"),
    ...
    ...

]

网友

2楼 · 编辑于 2024-04-19 23:18:56

当您使用url标记时，应该对字符串文本使用引号，例如：

{% url 'products' %}

此时product被视为一个变量，并在错误消息中计算为''。

网友

3楼 · 编辑于 2024-04-19 23:18:56

指定url的语法是{% url namespace:url_name %}。所以，检查是否在urls.py中添加了app_name。
在我的例子中，我拼错了网址。py具有以下内容path('<int:question_id>/', views.detail, name='question_detail')，而index.html文件具有以下条目<li><a href="{% url 'polls:detail' question.id %}">{{ question.question_text }}</a></li>。注意不正确的名字。

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