I'm working on my project for a course and I'm totally stuck right now. I'm creating a website to sell products through paypal and the paypal return/cancel pages are not rendering properly. I've followed the examples in my lessons and checked the code a hundred times but obviously there is something I'm missing.
I'm getting an error when I go to products, click buy now, login to paypal and then either cancel the purchase or buy the product and return to merchant's page. paypal_return.html and paypal_cancel.html are 2 templates saved under templates/paypal/
Can anybody see what I'm missing?
Here you can see the full code https://github.com/IreneG5/spss_online
Traceback
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.
In my case, this error occurred due to a mismatched url name. e.g,
<form action="{% url 'test-view' %}" method="POST">
urls.py
path("test/", views.test, name='test-view'),
In my case, I don't put namespace_name in the url tag ex: {% url 'url_name or pattern name' %}.
you have to specify the namespace_name like: {% url 'namespace_name:url_name or pattern name' %}.
Explanation: In project urls.py path('', include('blog.urls',namespace='blog')), and in app's urls.py you have to specify the app_name. like app_name = 'blog'. namespace_name is the app_name.
The common error that I have find is when you forget to define
your url in yourapp/urls.py
we don't want any suggetion!! solution plz..
In my case, what I did was a mistake in the url tag in the respective template. So, in my url tag I had something like
{% url 'polls:details' question.id %}
while in the views, I had written something like:
def details(request, question_id): code here
So, the first thing you might wanna check is whether things are spelled as they shoould be. The next thing then you can do is as the people above have suggested.
{% url namespace:url_name %}. So, check if you have added the app_name in urls.py.path('<int:question_id>/', views.detail, name='question_detail') whereas the index.html file had the following entry <li><a href="{% url 'polls:detail' question.id %}">{{ question.question_text }}</a></li>. Notice the incorrect name.Give the same name in urls.py
path('detail/<int:id>', views.detail, name="detail"),
Fix urlpatterns in urls.py file
For example, my app name is "simulator",
My URL pattern for login and logout looks like
urlpatterns = [
...
...
url(r'^login/$', simulator.views.login_view, name="login"),
url(r'^logout/$', simulator.views.logout_view, name="logout"),
...
...
]
I was receiving the same error when not specifying the app name before pattern name.
In my case:
app-name : Blog
pattern-name : post-delete
reverse_lazy('Blog:post-delete') worked.
Add store name to template like {% url 'app_name:url_name' %}
App_name = store
In urls.py,
path('search', views.searched, name="searched"),
<form action="{% url 'store:searched' %}" method="POST">
If you dont define name in the path field, usually the error will come.
e.g.: path('crud/',ABC.as_view(),name="crud")
On line 10 there's a space between s and t. It should be one word: stylesheet.
Source: Stackoverflow.com