IndexError at /

[Tayo Akinnayajo]

PLS IM WORKING ON THIS CAN ANYONE HELP FIX THE ERROR

Environment: Request Method: GET Request URL: http://127.0.0.1:8000/ Django Version: 3.1.4 Python Version: 3.9.0 Installed Applications: ['django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'django.contrib.sites', 'allauth', 'allauth.account', 'allauth.socialaccount', 'core', 'crispy_forms', 'django_countries'] 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\GEMINI INNOVATIONS\Documents\WEB DEV TUTOR FULL STACK\django_project_boilerplate-master\ECOMMERCE\templates\navbar.html, error at line 41 list index out of range 31 : <li class="nav-item"> 32 : <a class="nav-link waves-effect" href="/checkout" target="_blank">Checkout</a> 33 : </li> --> 34 : </ul> 35 : 36 : <!-- Right --> 37 : <ul class="navbar-nav nav-flex-icons"> 38 : {% if request.user.is_authenticated %} 39 : <li class="nav-item"> 40 : <a href="{% url 'core:order-summary' %}" class="nav-link waves-effect"> 41 : <!-- <span class="badge red z-depth-1 mr-1"> {{ request.user | cart_item_count }} </span> --> 42 : <i class="fas fa-shopping-cart"></i> 43 : <span class="clearfix d-none d-sm-inline-block"> Cart </span> 44 : </a> 45 : </li> 46 : <li class="nav-item"> 47 : <a class="nav-link waves-effect" href="{% url 'account_logout' %}"> 48 : <span class="clearfix d-none d-sm-inline-block"> Logout </span> 49 : </a> 50 : </li> 51 : {% else %} Traceback (most recent call last): File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\handlers\exception.py", line 47, in inner response = get_response(request) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\handlers\base.py", line 202, in _get_response response = response.render() File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\response.py", line 105, in render self.content = self.rendered_content File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\response.py", line 83, in rendered_content return template.render(context, self._request) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\backends\django.py", line 61, in render return self.template.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 170, in render return self._render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 162, in _render return self.nodelist.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 938, in render bit = node.render_annotated(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 905, in render_annotated return self.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\loader_tags.py", line 150, in render return compiled_parent._render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 162, in _render return self.nodelist.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 938, in render bit = node.render_annotated(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 905, in render_annotated return self.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\loader_tags.py", line 192, in render return template.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 172, in render return self._render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 162, in _render return self.nodelist.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 938, in render bit = node.render_annotated(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 905, in render_annotated return self.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\loader_tags.py", line 53, in render result = self.nodelist.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 938, in render bit = node.render_annotated(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 905, in render_annotated return self.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\defaulttags.py", line 312, in render return nodelist.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 938, in render bit = node.render_annotated(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 905, in render_annotated return self.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 988, in render output = self.filter_expression.resolve(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 698, in resolve new_obj = func(obj, *arg_vals) File "C:\Users\GEMINI INNOVATIONS\Documents\WEB DEV TUTOR FULL STACK\django_project_boilerplate-master\ECOMMERCE\core\templatetags\cart_template_tags.py", line 13, in cart_item_count return qs[0].items.count() File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\query.py", line 325, in __getitem__ return qs._result_cache[0] Exception Type: IndexError at / Exception Value: list index out of range

[Jacob Greene]

The backtrace is pretty clear..

Here's the import part: 

 File "C:\Users\GEMINI INNOVATIONS\Documents\WEB DEV TUTOR FULL STACK\django_project_boilerplate-master\ECOMMERCE\core\templatetags\cart_template_tags.py", line 13, in cart_item_count return qs[0].items.count() 

"qs" is probably an empty list and you are trying access the 1st item via qs[0]

I'd consider posting future questions not in all caps. Really weird post dude. 

On Fri, Jun 11, 2021 at 2:14 PM Tayo Akinnayajo <tayoaki...@gmail.com> wrote:

PLS IM WORKING ON THIS CAN ANYONE HELP FIX THE ERROR

Environment: Request Method: GET Request URL: http://127.0.0.1:8000/ Django Version: 3.1.4 Python Version: 3.9.0 Installed Applications: ['django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'django.contrib.sites', 'allauth', 'allauth.account', 'allauth.socialaccount', 'core', 'crispy_forms', 'django_countries'] 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\GEMINI INNOVATIONS\Documents\WEB DEV TUTOR FULL STACK\django_project_boilerplate-master\ECOMMERCE\templates\navbar.html, error at line 41 list index out of range 31 : <li class="nav-item"> 32 : <a class="nav-link waves-effect" href="/checkout" target="_blank">Checkout</a> 33 : </li> --> 34 : </ul> 35 : 36 : <!-- Right --> 37 : <ul class="navbar-nav nav-flex-icons"> 38 : {% if request.user.is_authenticated %} 39 : <li class="nav-item"> 40 : <a href="{% url 'core:order-summary' %}" class="nav-link waves-effect"> 41 : <!-- <span class="badge red z-depth-1 mr-1"> {{ request.user | cart_item_count }} </span> --> 42 : <i class="fas fa-shopping-cart"></i> 43 : <span class="clearfix d-none d-sm-inline-block"> Cart </span> 44 : </a> 45 : </li> 46 : <li class="nav-item"> 47 : <a class="nav-link waves-effect" href="{% url 'account_logout' %}"> 48 : <span class="clearfix d-none d-sm-inline-block"> Logout </span> 49 : </a> 50 : </li> 51 : {% else %} Traceback (most recent call last): File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\handlers\exception.py", line 47, in inner response = get_response(request) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\handlers\base.py", line 202, in _get_response response = response.render() File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\response.py", line 105, in render self.content = self.rendered_content File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\response.py", line 83, in rendered_content return template.render(context, self._request) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\backends\django.py", line 61, in render return self.template.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 170, in render return self._render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 162, in _render return self.nodelist.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 938, in render bit = node.render_annotated(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 905, in render_annotated return self.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\loader_tags.py", line 150, in render return compiled_parent._render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 162, in _render return self.nodelist.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 938, in render bit = node.render_annotated(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 905, in render_annotated return self.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\loader_tags.py", line 192, in render return template.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 172, in render return self._render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 162, in _render return self.nodelist.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 938, in render bit = node.render_annotated(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 905, in render_annotated return self.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\loader_tags.py", line 53, in render result = self.nodelist.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 938, in render bit = node.render_annotated(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 905, in render_annotated return self.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\defaulttags.py", line 312, in render return nodelist.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 938, in render bit = node.render_annotated(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 905, in render_annotated return self.render(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 988, in render output = self.filter_expression.resolve(context) File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\template\base.py", line 698, in resolve new_obj = func(obj, *arg_vals) File "C:\Users\GEMINI INNOVATIONS\Documents\WEB DEV TUTOR FULL STACK\django_project_boilerplate-master\ECOMMERCE\core\templatetags\cart_template_tags.py", line 13, in cart_item_count return qs[0].items.count() File "C:\Users\GEMINI INNOVATIONS\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\query.py", line 325, in __getitem__ return qs._result_cache[0] Exception Type: IndexError at / Exception Value: list index out of range

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[Nikeet NA]

Your list is empty check for it then return count as 0 if the list is not empty  then return qs[0].items.count()

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