Develop Reference

Fixing No Reverse Match in a Django Project

I am getting the following error: Reverse for 'order_pdf' with arguments '('',)' not found. 1 pattern(s) tried: ['business_plan/(?P<id>[0-9]+)/pdf/$']
I am not sure exactly what is the reason for it.
Here is the model:
class Info(models.Model):
logo = models.ImageField(default='report-cover.jpg', null=True, blank=True)
date_posted = models.DateTimeField(default=timezone.now)
name = models.CharField(null=True, blank=True, max_length=100)
Here is the views.py
def add_business_plan(request):
# info=Info.objects.all()
if request.method == 'POST':
# create a form instance and populate it with data from the request:
form = infoForm(request.POST)
# check whether it's valid:
if form.is_valid():
form.save()
business_name = form.cleaned_data.get('businessName')
messages.success(request, f'PDF created for {business_name}!')
# return redirect('businessplan:businessplan')
# redirect(reverse('businessplan:businessplan', kwargs={'successful_submit': True}))
return render(request, 'businessplan/businessplan.html', {'successful_submit': True})
# if a GET (or any other method) we'll create a blank form
else:
form = infoForm()
print(form.errors)
return render(request, 'businessplan/businessplan.html', {'form': form, 'successful_submit': False,
# "Info": info
})
def order_pdf(request, info_id):
info = get_object_or_404(Info, id=info_id)
html = render_to_string('businessplan/pdf.html', {'info': info})
response = HttpResponse(content_type='application/pdf')
response['Content-Disposition'] = 'attachment; filename="{}-Business Plan.pdf"'.format(info.businessName)
weasyprint.HTML(string=html, base_url=request.build_absolute_uri()).write_pdf(response,
stylesheets=[weasyprint.CSS(settings.STATICFILES_DIRS[0] + '\css\\report.css')], presentational_hints=True)
return response
def admin_order_pdf(request, info_id):
info = get_object_or_404(Info, id=info_id)
html = render_to_string('businessplan/pdf.html', {'info': info})
response = HttpResponse(content_type='application/pdf')
response['Content-Disposition'] = 'filename="{}-Business Plan.pdf"'.format(info.businessName)
weasyprint.HTML(string=html, base_url=request.build_absolute_uri()).write_pdf(response,
stylesheets=[weasyprint.CSS(settings.STATICFILES_DIRS[0] + '\css\\report.css')], presentational_hints=True)
return response
Here is the urls.py
urlpatterns = [
path('', add_business_plan, name='businessplan'),
path('businessplan/admin/info/<str:info_id>/pdf/', admin_order_pdf, name='admin_order_pdf'),
#path('<str:info_id>/pdf/', admin_order_pdf, name='admin_order_pdf'),
path('<str:info_id>/pdf/', order_pdf, name='order_pdf'),
]
Here is the businessplan.html snippet of the template:
....modal divs
<a href="{% url 'businessplan:order_pdf' Info.id %}">
<!--<a href="{% url 'businessplan:order_pdf' obj.id %}">-->
<!--<a href="{% url 'businessplan:order_pdf' Info.info_id %}">-->
....modal divs
<form class="needs-validation" method="post" novalidate enctype="multipart/form-data">
{% csrf_token %}
<div class="form-outline mb-4 mt-3">
<input required autocomplete="off" type="text" class="form-control" name=" name"
{% if form.is_bound %} value= "{{ form.name.value }}" {% endif %}>
<label class="form-label">Name</label>
</div>
{% for err in form.name.errors %}
<small class="text-danger ml-2">{{ err }}</small>
{% endfor %}
</div>
</form>
{% if successful_submit %}
<script type="text/javascript">
$(document).ready(function(){
$("#exampleModal").modal('show');
});
</script>
{% endif %}
I can access the pdf from the admin but I am trying to access to add this button for easier functionality.
I have tried changing the info_id to id it didn't work.
What is the reason for this error?
Here is the traceback:
Internal Server Error: /business_plan/
Traceback (most recent call last):
File "C:\Users\User\Desktop\Portfolio\venv\lib\site-packages\django\core\handlers\exception.py", line 47, in inner
response = get_response(request)
File "C:\Users\User\Desktop\Portfolio\venv\lib\site-packages\django\core\handlers\base.py", line 179, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\User\Desktop\Portfolio\businessplan\views.py", line 30, in add_business_plan
return render(request, 'businessplan/businessplan.html', {'form': form, 'successful_submit': False })
File "C:\Users\User\Desktop\Portfolio\venv\lib\site-packages\django\shortcuts.py", line 19, in render
content = loader.render_to_string(template_name, context, request, using=using)
File "C:\Users\User\Desktop\Portfolio\venv\lib\site-packages\django\template\loader.py", line 62, in render_to_string
return template.render(context, request)
File "C:\Users\User\Desktop\Portfolio\venv\lib\site-packages\django\template\backends\django.py", line 61, in render
return self.template.render(context)
File "C:\Users\User\Desktop\Portfolio\venv\lib\site-packages\django\template\base.py", line 170, in render
return self._render(context)
File "C:\Users\User\Desktop\Portfolio\venv\lib\site-packages\django\template\base.py", line 162, in _render
return self.nodelist.render(context)
File "C:\Users\User\Desktop\Portfolio\venv\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\User\Desktop\Portfolio\venv\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\User\Desktop\Portfolio\venv\lib\site-packages\django\template\defaulttags.py", line 446, in render
url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app)
File "C:\Users\User\Desktop\Portfolio\venv\lib\site-packages\django\urls\base.py", line 87, in reverse
return iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))
File "C:\Users\User\Desktop\Portfolio\venv\lib\site-packages\django\urls\resolvers.py", line 685, in _reverse_with_prefix
raise NoReverseMatch(msg)
django.urls.exceptions.NoReverseMatch: Reverse for 'order_pdf' with arguments '('',)' not found. 1 pattern(s) tried: ['business_plan/(?P<info_id>[^/]+)/pdf/$']
[10/Oct/2021 06:58:51] "GET /business_plan/ HTTP/1.1" 500 143694

Looks like <a href="{% url 'businessplan:order_pdf' Info.id %}"> doesn't work because you don't pass it to the template context.
As a result, the call fails because Info.id is an empty string (cf https://docs.djangoproject.com/en/3.2/ref/templates/api/#invalid-template-variables), hence breaking the URL reversing logic.
You should pass your info instance to the template context to make this work, e.g like this:
return render(
request,
'businessplan/businessplan.html',
{
'form': form,
'successful_submit': False,
"Info": info_instance
}
)

How can I fix this searchbar error in django?

I'm trying to create a searchbar in my blog in python, but I'm receiving the following error: Reverse for 'article-detail' with arguments '('',)' not found. 1 pattern(s) tried: ['app1/article/(?P[0-9]+)$'] and I'm not sure why, so here's the code so you guys can see what's going on here:
Traceback
Traceback (most recent call last):
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\core\handlers\exception.py", line 47, in inner
response = get_response(request)
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\core\handlers\base.py", line 179, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\snin2\Desktop\basura\lapagina\app1\views.py", line 187, in searchbar
return render(request, 'app1/search.html', {'query':query, 'results':results})
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\shortcuts.py", line 19, in render
content = loader.render_to_string(template_name, context, request, using=using)
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\template\loader.py", line 62, in render_to_string
return template.render(context, request)
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\template\backends\django.py", line 61,
in render
return self.template.render(context)
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\template\base.py", line 170, in render
return self._render(context)
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\template\base.py", line 162, in _render
return self.nodelist.render(context)
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\template\loader_tags.py", line 150, in
render
return compiled_parent._render(context)
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\template\base.py", line 162, in _render
return self.nodelist.render(context)
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\template\loader_tags.py", line 62, in render
result = block.nodelist.render(context)
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\template\defaulttags.py", line 312, in
render
return nodelist.render(context)
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\template\defaulttags.py", line 211, in
render
nodelist.append(node.render_annotated(context))
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\template\defaulttags.py", line 446, in
render
url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app)
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\urls\base.py", line 87, in reverse
return iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))
File "C:\Users\snin2\anaconda3\envs\MyDjangoEnv\lib\site-packages\django\urls\resolvers.py", line 685, in _reverse_with_prefix
raise NoReverseMatch(msg)
django.urls.exceptions.NoReverseMatch: Reverse for 'article-detail' with arguments '('',)' not found. 1 pattern(s) tried: ['app1/article/(?P<pk>[0-9]+)$']
Models.py
class StockNames(models.Model):
name = models.CharField(max_length=255)
symbol = models.CharField(max_length=255)
def __str__(self):
return self.symbol
class Post(models.Model):
title = models.CharField(max_length= 255)
header_image = models.ImageField(null = True, blank = True, upload_to = 'images/')
author = models.ForeignKey(User, on_delete=models.CASCADE)
body = RichTextField(blank = True, null = True)
#body = models.TextField()
post_date = models.DateField(auto_now_add=True)
category = models.CharField(max_length=255, default='coding')
snippet = models.CharField(max_length=255)
likes = models.ManyToManyField(User, related_name = 'blog_posts')
stock = models.ForeignKey(StockNames, null=True, on_delete = models.CASCADE)
def total_likes(self):
return self.likes.count()
def __str__(self):
return self.title + ' | ' + str(self.author)
def get_absolute_url(self):
return reverse('app1:article-detail', args=(self.id,))
Views.py
def searchbar(request):
query = None
results = []
if request.method == 'GET':
query=request.GET.get("search")
results= Post.objects.filter(Q(title__icontains=query) | Q(stock__symbol__icontains=query))
return render(request, 'app1/search.html', {'query':query, 'results':results})
search.html
{% extends "app1/base.html" %}
{% block body_block %}
<div class="container">
<h1>Search Page</h1>
{% if query %}
<h3>{% with results.count as total_results %}
Found {{total_results}} total results
{% endwith %}
</h3>
{% for x in results %}
<li>{{sym}} -
{{post.author}} - <small>{{post.post_date}}</small> -
{% if user.is_authenticated %}
<small>Edit</small><small>
- Delete
</small></li>
{% endif %}
</div>
{% empty %}
<h1>There's no query</h1>
{% endfor %}
{% else %}
<h3>Error in your query</h3>
{% endif %}
{% endblock %}
base.html (specifically the search input)
<form action="{% url 'app1:searchbar' %}" class="form-inline my-2 my-lg-0" method="GET">
<input name="search" class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search", name='search'>
<button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
</form>
urls.py (the last one)
app_name = 'app1'
urlpatterns = [
path('post/', PostView.as_view(), name = 'Post'),
path('article/<int:pk>', ArticleDetailView.as_view(), name = 'article-detail'),
path('add_post/<str:sym>',AddPostView.as_view(), name='addpost'),
path('update_post/<int:pk>', UpdatePostView.as_view(), name = 'updatepost'),
path('delete_post/<int:pk>', DeletePostView.as_view(), name = 'deletepost'),
path('add_category/', AddCategoryView.as_view(), name = 'add_category'),
path('category/<str:cats>/', views.CategoryView, name = 'category'),
path('category-list/', views.CategoryListView, name ='category-list'),
path('like/<int:pk>/', views.LikeView, name = 'like_post'),
path('my_posts/', views.MyPostsView.as_view(), name = 'my_posts'),
path('article/<int:pk>/add_comment/', AddCommentView.as_view(), name = 'add_comment'),
path('update_comment/<int:pk>', UpdateCommentView.as_view(), name = 'updatecomment'),
path('delete_comment/<int:pk>', DeleteCommentView.as_view(), name = 'deletecomment'),
path('stock/<str:sym>/', views.StockView, name = 'stock'),
path('searchbar/', views.searchbar, name = 'searchbar'),
]
Thanks in advance!

{% for post in results %}
<li>{{sym}} -
{% if user.is_authenticated %}
<small>Edit</small><small>
- Delete
</small></li>
{% endif %}

<a href="{% url 'app1:article-detail' post.pk %}">
here 'post' is not declared/contexted/retrieved from db.thats why you are getting error.

Reverse for 'anhangdelete' with arguments '('',)' not found. 1 pattern(s) tried: ['Verwaltung/AnhangDelete/(?P<id>[0-9]+)$']

Error:
Request Method: GET Request
URL: http://127.0.0.1:8000/Verwaltung/Anhang/10 Django Version: 3.0.1
Exception Type: NoReverseMatch Exception Value: Reverse for
'anhangdelete' with arguments '('',)' not found. 1 pattern(s) tried:
['Verwaltung/AnhangDelete/(?P[0-9]+)$'] Exception
Location: C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\urls\resolvers.py
in _reverse_with_prefix, line 677 Python
Executable: C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\Scripts\python.exe
Python Version: 3.8.0
views.py
#login_required()
def anhang_view(request, id=None):
contextoo = {}
item = Kunden.objects.get(id=id)
kontaktform_form = KontaktForm(request.POST or None, instance=item)
creatorform_form = CreateANform()
contextoo['creatorform_form'] = creatorform_form
if Kunden.objects.filter(KN=item.KN).exists():
item14 = Kunden.objects.get(KN=item.KN)
editkontakto_form = InfoKontaktoForm(request.POST or None, instance=item14)
contextoo['editkontakto_form'] = editkontakto_form
if Anhang.objects.filter(KN=item.KN).exists():
item15 = Anhang.objects.filter(KN=item.KN)
contextoo['ANform_form'] = item15
if request.method == 'POST':
creatorform_form = CreateANform(request.POST)
if creatorform_form.is_valid():
cre = creatorform_form.save(commit=True)
cre.save()
return redirect('/Verwaltung/KontaktAnlegen')
else:
return render(request, 'blog/anhang.html', contextoo)
#login_required()
def AnhangDeleteView(request, id):
anh = Anhang.objects.get(id=id)
anh.delete()
return redirect(reverse('blog:Anhang'))
urls.py
path('AnhangDelete/<int:id>', views.AnhangDeleteView, name='anhangdelete'),
anhang.html
.
.
.
{% if ANform_form %}
{% for obj in ANform_form %}
<table class="table" width="100%" border="0" cellspacing="0" cellpadding="0">
<thead class="thead-light">
<tr>
<td width="11%" border="0" cellspacing="0" cellpadding="0">
<b>
{% csrf_token %}
{{ obj.Thema }}
</b>
</td>
<td width="15%" border="0" cellspacing="0" cellpadding="0">Username</td>
<td width="19%" border="0" cellspacing="0" cellpadding="0">Password</td>
<td width="18%" border="0" cellspacing="0" cellpadding="0">E-Mail</td>
<td width="37%" border="0" cellspacing="0" cellpadding="0">Anhang</td>
<td>
</td>
<td></td>
</tr>
</thead>
<tbody>
<td></td>
<td>
{% csrf_token %}
{{ obj.Username }}
</td>
<td>
{% csrf_token %}
{{ obj.Password }}
</td>
<td>
{% csrf_token %}
{{ obj.Email }}
</td>
<td>
{% csrf_token %}
{{ obj.Anhang }}
</td>
<td>
<button type="button" class="btn btn-danger">Löschen</button> </td>
</td>
</tbody>
</table>
{% endfor %}
{% endif %}
models.py
class Anhang(models.Model):
KN = models.IntegerField(unique=False)
Thema = models.CharField(max_length=100, blank=True, unique=False)
Username = models.CharField(max_length=100, blank=True, unique=False)
Password = models.CharField(max_length=100, blank=True, unique=False)
Email = models.CharField(max_length=100, blank=True, unique=False)
Anhang = models.CharField(max_length=250, blank=True, unique=False)
class Kunden(models.Model):
KN = models.IntegerField(unique=True)
Anrede = models.CharField(max_length=30, blank=True)
Name = models.CharField(max_length=30, blank=True)
Vorname = models.CharField(max_length=30, blank=True)
Infos = models.CharField(max_length=250, default='Notiz:', editable=True)
so... all my delete_views work except that, because normally they have their source from "Kunden.id" but this delete_view orientates on Anhang.KN as much as i think and i dont know where the issue is...
TRACEBACK
Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/Verwaltung/Anhang/10
Django Version: 3.0.1
Python Version: 3.8.0
Installed Applications:
['django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'blog',
'rlwebs',
'django_tables2',
'bootstrap4']
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\PC\PycharmProjects\AddressLizenzbuch\web\blog\templates\blog\base.html, error at line 0
Reverse for 'AnhangDelete' with arguments '('',)' not found. 1 pattern(s) tried: ['Verwaltung/AnhangDelete/(?P<id>[0-9]+)$']
1 :
2 : <!DOCTYPE html>
3 : <html lang="en">
4 : <div class="p-3 mb-2 bg-secondary text-white">
5 :
6 : <head>
7 : <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
8 : <meta charset="UTF-8">
9 : <title>{% block supertitle %} Home {% endblock %}</title>
10 : <!-- Bootstrap Core CSS -->
Traceback (most recent call last):
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\core\handlers\exception.py", line 34, in inner
response = get_response(request)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\core\handlers\base.py", line 115, in _get_response
response = self.process_exception_by_middleware(e, request)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\core\handlers\base.py", line 113, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\contrib\auth\decorators.py", line 21, in _wrapped_view
return view_func(request, *args, **kwargs)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\web\blog\views.py", line 200, in anhang_view
return render(request, 'blog/anhang.html', contextoo)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\shortcuts.py", line 19, in render
content = loader.render_to_string(template_name, context, request, using=using)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\template\loader.py", line 62, in render_to_string
return template.render(context, request)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\template\backends\django.py", line 61, in render
return self.template.render(context)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\template\base.py", line 171, in render
return self._render(context)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\template\base.py", line 163, in _render
return self.nodelist.render(context)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\template\base.py", line 936, in render
bit = node.render_annotated(context)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\template\base.py", line 903, in render_annotated
return self.render(context)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\template\loader_tags.py", line 150, in render
return compiled_parent._render(context)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\template\base.py", line 163, in _render
return self.nodelist.render(context)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\template\base.py", line 936, in render
bit = node.render_annotated(context)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\template\base.py", line 903, in render_annotated
return self.render(context)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\template\loader_tags.py", line 62, in render
result = block.nodelist.render(context)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\template\base.py", line 936, in render
bit = node.render_annotated(context)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\template\base.py", line 903, in render_annotated
return self.render(context)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\template\defaulttags.py", line 309, in render
return nodelist.render(context)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\template\base.py", line 936, in render
bit = node.render_annotated(context)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\template\base.py", line 903, in render_annotated
return self.render(context)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\template\defaulttags.py", line 209, in render
nodelist.append(node.render_annotated(context))
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\template\base.py", line 903, in render_annotated
return self.render(context)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\template\defaulttags.py", line 443, in render
url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app)
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\urls\base.py", line 87, in reverse
return iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))
File "C:\Users\PC\PycharmProjects\AddressLizenzbuch\venv\lib\site-packages\django\urls\resolvers.py", line 677, in _reverse_with_prefix
raise NoReverseMatch(msg)
Exception Type: NoReverseMatch at /Verwaltung/Anhang/10
Exception Value: Reverse for 'AnhangDelete' with arguments '('',)' not found. 1 pattern(s) tried: ['Verwaltung/AnhangDelete/(?P<id>[0-9]+)$']
Traceback is with this code sample in anhang.html
<button type="button" class="btn btn-danger">Löschen</button> </td>

(Django) DetailView template not displaying information

Within my maintenance app, I have six models. I will include only 2 of the models that are relevant towards this question. There is a list of equipment (Listview) which displays properly. However, I'm having a problem creating a DetailView for each equipment. When I go to the http://127.0.0.1:8000/maintenance/equipments/1 it should display all equipment instance (details) relevant to equipment 1 but it displays back the equipment list page, i.e, http://127.0.0.1:8000/maintenance/equipments/.
models.py
from django.db import models
class Equipment(models.Model):
"""
Model representing an Equipment (but not a specific type of equipment).
"""
title = models.CharField(max_length=200)
physicist = models.ForeignKey('Physicist', null=True, help_text= 'add information about the physicist')
technician = models.ForeignKey('Technician', null=True, help_text= 'add information about the technician')
# Physicist as a string rather than object because it hasn't been declared yet in the file.
features = models.TextField(max_length=1000, help_text='Enter a brief description of the features of the equipment')
machine_number = models.CharField('Number', max_length=30, null=True, help_text='Enter the Equipment number')
specialty = models.ForeignKey(Specialty, null=True, help_text='Select a specialty for an equipment')
# Specialty class has already been defined so we can specify the object above.
assigned_technician = models.CharField(max_length=50, null= True, blank=True)
#This is for the Technician who the repair of the Equipment is assigned to.
def __str__(self):
return self.title
def get_absolute_url(self):
return reverse('equipment-detail', args=[str(self.id)])
def display_specialty(self):
return ', '.join([ specialty.name for specialty in self.specialty.all()[:3] ])
display_specialty.short_description = 'Specialty'
class Meta:
ordering = ['-id']
class EquipmentInstance(models.Model):
id = models.UUIDField(primary_key=True, default=uuid.uuid4, help_text="Unique ID for this particular equipment across the entire database")
equipment = models.ForeignKey('Equipment', on_delete=models.SET_NULL, null=True)
imprint = models.CharField(max_length=200)
due_date = models.DateField(null=True, blank=True)
delegate = models.ForeignKey('Physicist', on_delete=models.SET_NULL, null=True, blank=True)
def is_overdue(self):
if self.due_date and date.today() > self.due_date:
return True
return False
MAINTENANCE_STATUS = (
('p', 'Past Maintenance'),
('o', 'On Maintenance'),
('a', 'Available'),
('r', 'Reserved'),
)
status = models.CharField(max_length=1, choices = MAINTENANCE_STATUS, blank=True, default='m', help_text='Equipment availability')
class Meta:
ordering = ["due_date"]
permissions = (("can_mark_maintained", "Set equipment as maintained"),)
def __str__(self):
"""
String for representing the Model object
"""
return '{0} ({1})'.format(self.id,self.equipment.title)
maintanance/urls.py
from django.conf.urls import url
from qatrack.maintenance import views
from qatrack.maintenance import models
urlpatterns = [
url(r'^$', views.MDashboard, name='m_dash'),
url(r'^equipments/$', views.EquipmentListView.as_view(), name='equipments'),
url(r'^equipment(?P<pk>\d+)/$', views.EquipmentDetailView.as_view(), name='equipment-detail'),
]
views.py
from django.shortcuts import render
from django.views.generic import DetailView, ListView
from qatrack.maintenance import models
class EquipmentListView(ListView):
template_name = 'maintenance/equipment_list.html'
def get_queryset(self):
return models.Equipment.objects.all()
paginate_by = 10
class EquipmentDetailView(DetailView):
model = models.Equipment
template_name = 'maintenance/equipment_detail.html'
context_object_name = 'equipment'
equipment_list.html
{% extends "maintenance/m_base.html" %}
{% block body %}
<div class="row">
<div class="col-md-12">
<div class="box">
<h1>Equipment List</h1>
{% if equipment_list %}
<ul>
{% for equipment in equipment_list %}
<li>
{{ equipment.title }} ({{equipment.physicist}}, {{equipment.technician}})
</li>
{% endfor %}
</ul>
{% else %}
<p>There are no equipments in the database.</p>
{% endif %}
</div>
</div>
</div>
{% endblock body %}
equipment_detail.html
{% extends "maintenance/m_base.html" %}
{% block title %}Equipment Details{% endblock %}
{% block body %}
<h1>Title: {{ equipment.title }}</h1>
<h2>Machine Detail</h2>
<p><strong>Physicist:</strong> {{ equipment.physicist }}</p> <!-- physicist detail link not yet defined -->
<p><strong>Technician:</strong> {{ equipment.technician }}</p> <!-- technician detail link not yet defined -->
<p><strong>Features:</strong> {{ equipment.features }}</p>
<p><strong>Machine_number:</strong> {{ equipment.machine_number }}</p>
<p><strong>Specialty:</strong> {% for specialty in equipment.specialty.all %} {{ specialty }}{% if not forloop.last %}, {% endif %}{% endfor %}</p>
{% for type in equipment.equipmentinstance_set.all %}
<hr>
<p class="{% if type.status == 'a' %}text-success{% elif type.status == 'm' %}text-danger{% else %}text-warning{% endif %}">{{ type.get_status_display }}</p>
{% if type.status != 'a' %}<p><strong>Due to be maintained:</strong> {{type.due_date}}</p>{% endif %}
<p><strong>Imprint:</strong> {{type.imprint}}</p>
<p class="text-muted"><strong>Id:</strong> {{type.id}}</p>
{% endfor %}
</div>
{% endblock body %}
urls.py
from django.conf import settings
from django.conf.urls import include, url
from django.conf.urls.static import static
from django.views.generic.base import TemplateView, RedirectView
from django.contrib.staticfiles.templatetags.staticfiles import static as static_url
from django.contrib import admin
from qatrack.maintenance.views import get_data
admin.autodiscover()
urlpatterns = [
url(r'^$', TemplateView.as_view(template_name="homepage.html"), name="home"),
url(r'^accounts/', include('qatrack.accounts.urls')),
url(r'^qa/', include('qatrack.qa.urls')),
url(r'^servicelog/', include('qatrack.service_log.urls')),
url(r'^parts/', include('qatrack.parts.urls')),
url(r'^units/', include('qatrack.units.urls')),
url(r'^issues/', include('qatrack.issue_tracker.urls')),
url(r'^maintenance/', include('qatrack.maintenance.urls')),
] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
I have gone through a lot of questions similar to this here and applied them but I still can't get the DetailView to work. I will really appreciate any help. Thanks. After making changes I encountered this traceback error
Internal Server Error: /maintenance/equipment1/ Traceback (most recent
call last): File
"/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/urls/base.py",
line 77, in reverse
extra, resolver = resolver.namespace_dict[ns] KeyError: 'equipments'
During handling of the above exception, another exception occurred:
Traceback (most recent call last): File
"/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/core/handlers/exception.py",
line 41, in inner
response = get_response(request) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/core/handlers/base.py",
line 217, in _get_response
response = self.process_exception_by_middleware(e, request) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/core/handlers/base.py",
line 215, in _get_response
response = response.render() File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/template/response.py",
line 107, in render
self.content = self.rendered_content File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/template/response.py",
line 84, in rendered_content
content = template.render(context, self._request) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/template/backends/django.py",
line 66, in render
return self.template.render(context) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/template/base.py",
line 207, in render
return self._render(context) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/test/utils.py",
line 107, in instrumented_test_render
return self.nodelist.render(context) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/template/base.py",
line 990, in render
bit = node.render_annotated(context) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/template/base.py",
line 957, in render_annotated
return self.render(context) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/template/loader_tags.py",
line 177, in render
return compiled_parent._render(context) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/test/utils.py",
line 107, in instrumented_test_render
return self.nodelist.render(context) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/template/base.py",
line 990, in render
bit = node.render_annotated(context) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/template/base.py",
line 957, in render_annotated
return self.render(context) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/template/loader_tags.py",
line 177, in render
return compiled_parent._render(context) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/test/utils.py",
line 107, in instrumented_test_render
return self.nodelist.render(context) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/template/base.py",
line 990, in render
bit = node.render_annotated(context) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/template/base.py",
line 957, in render_annotated
return self.render(context) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/template/loader_tags.py",
line 72, in render
result = block.nodelist.render(context) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/template/base.py",
line 990, in render
bit = node.render_annotated(context) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/template/base.py",
line 957, in render_annotated
return self.render(context) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/template/defaulttags.py",
line 322, in render
return nodelist.render(context) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/template/base.py",
line 990, in render
bit = node.render_annotated(context) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/template/base.py",
line 957, in render_annotated
return self.render(context) File "/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/template/defaulttags.py",
line 458, in render
url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app) File
"/home/blesjoe1/venvs/qatrack3/lib/python3.5/site-packages/django/urls/base.py",
line 87, in reverse
raise NoReverseMatch("%s is not a registered namespace" % key) django.urls.exceptions.NoReverseMatch: 'equipments' is not a
registered namespace [14/May/2018 16:05:33] "GET
/maintenance/equipment1/ HTTP/1.1" 500 215728

Your url is not correct
instead of
url(r'^equipment(?:/(?P<pk>\d+))?/$', views.EquipmentDetailView.as_view(), name="equipment_detail"),
it should be:
url(r'^equipment/(?P<pk>\d+)/$', views.EquipmentDetailView.as_view(), name="equipment_detail"),

Update your DetailView with this:
class EquipmentDetailView(DetailView):
model = models.Equipment
template_name = 'maintenance/equipment_detail.html'
context_object_name = 'equipment'
You don't need to override default method if you are not doing anything extra than the DetailView offers.

Django Add Edit Form - Field has no attribute assigned to it?

Im trying to combine an add and edit form into one and am receiving an error The 'site_image' attribute has no file associated with it.
I could edit files but could not add files, but now when I load the site files page I am receiving the below error, I havent changed the model so am unsure as to why im receiving this error.
the list of files shouldn't really care if site_image is there or not as its set to blank and null?
my file model:
class SiteFiles(models.Model):
site_data = models.ForeignKey(SiteData, verbose_name="Site", on_delete=models.PROTECT)
site_image = models.ImageField(upload_to='site_files/', blank=True, null=True)
site_image_thumbnail = ImageSpecField(source='site_image',
processors=[ResizeToFill(200, 150)],
format='JPEG',
options={'quality': 60})
site_file = models.FileField(blank=True, upload_to=site_files_path, \
validators=[validate_file_extension])
file_name = models.CharField(max_length=200, verbose_name="File Name")
file_type = models.CharField(max_length=100, verbose_name='File Type', \
choices=settings.FILE_TYPE)
class Meta:
verbose_name = "Site Files"
verbose_name_plural = "Site Files"
def __str__(self):
return '%s | %s | %s ' % (self.site_data.location, self.site_data.location, self.file_name)
my forms.py
class FileForm(forms.ModelForm):
class Meta:
model = SiteFiles
fields = ['site_image', 'site_file', 'file_name','file_type']
def __init__(self, *args, **kwargs):
super(FileForm, self).__init__(*args, **kwargs)
self.helper = FormHelper(self)
self.helper.form_id = 'file_form'
self.helper.form_method = 'POST'
self.helper.add_input(Submit('submit', 'Save', css_class='btn-primary'))
self.helper.layout = Layout(
Div(
Div(
Div(
Div(HTML('<i class="fa fa-camera-retro fa-fw"></i> Add File or Photo'), css_class='panel-heading'),
Div(
Field('site_image', placeholder='Image'),
Field('site_file', placeholder='File'),
Field('file_name', placeholder='Display Name'),
Div('file_type', title="File Type"),
css_class='panel-body'
),
css_class='panel panel-default',
),
css_class='col-lg-3'
),
css_class='row'
),
)
my views.py
#login_required
#user_passes_test(lambda u: u.has_perm('sites.add_sitefile'))
def add_edit_file(request, site_id, item_id=None):
from sites.forms import FileForm
from sites.models import SiteFiles
site_data = get_object_or_404(SiteData, pk=site_id)
# set edit values
if item_id:
item_data = get_object_or_404(SiteFiles, pk=item_id)
form_type = 'Edit'
form = FileForm(instance=item_data)
else:
# set add values
form = FileForm()
form_type = 'Add'
item_data = SiteFiles()
# set posting
if request.method == 'POST':
form = FileForm(request.POST,instance=item_data)
if form.is_valid():
form.instance.site_data = site_data
form.save()
return redirect('sites:site_detail_files', site_id)
return render(request, 'sites/add_edit_file.html', {
'add_edit_file_form': form,
'SiteName' : site_data.location,
'SiteID' : site_id,
'ItemID' : item_id,
'FormType' : form_type
})
Error:
Traceback:
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in _resolve_lookup
882. current = current[bit]
During handling of the above exception ('ImageFieldFile' object is not subscriptable), another exception occurred:
File "/usr/local/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
41. response = get_response(request)
File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py" in _legacy_get_response
249. response = self._get_response(request)
File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
187. response = self.process_exception_by_middleware(e, request)
File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
185. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/usr/local/lib/python3.6/site-packages/django/contrib/auth/decorators.py" in _wrapped_view
23. return view_func(request, *args, **kwargs)
File "/itapp/itapp/sites/views.py" in site_detail_files
311. 'active_files' : 'class="active"',
File "/usr/local/lib/python3.6/site-packages/django/shortcuts.py" in render
30. content = loader.render_to_string(template_name, context, request, using=using)
File "/usr/local/lib/python3.6/site-packages/django/template/loader.py" in render_to_string
68. return template.render(context, request)
File "/usr/local/lib/python3.6/site-packages/django/template/backends/django.py" in render
66. return self.template.render(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
207. return self._render(context)
File "/usr/local/lib/python3.6/site-packages/django/test/utils.py" in instrumented_test_render
107. return self.nodelist.render(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
990. bit = node.render_annotated(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
957. return self.render(context)
File "/usr/local/lib/python3.6/site-packages/django/template/loader_tags.py" in render
177. return compiled_parent._render(context)
File "/usr/local/lib/python3.6/site-packages/django/test/utils.py" in instrumented_test_render
107. return self.nodelist.render(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
990. bit = node.render_annotated(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
957. return self.render(context)
File "/usr/local/lib/python3.6/site-packages/django/template/loader_tags.py" in render
177. return compiled_parent._render(context)
File "/usr/local/lib/python3.6/site-packages/django/test/utils.py" in instrumented_test_render
107. return self.nodelist.render(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
990. bit = node.render_annotated(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
957. return self.render(context)
File "/usr/local/lib/python3.6/site-packages/django/template/loader_tags.py" in render
72. result = block.nodelist.render(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
990. bit = node.render_annotated(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
957. return self.render(context)
File "/usr/local/lib/python3.6/site-packages/django/template/defaulttags.py" in render
216. nodelist.append(node.render_annotated(context))
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
957. return self.render(context)
File "/usr/local/lib/python3.6/site-packages/django/template/library.py" in render
202. resolved_args, resolved_kwargs = self.get_resolved_arguments(context)
File "/usr/local/lib/python3.6/site-packages/django/template/library.py" in get_resolved_arguments
188. resolved_args = [var.resolve(context) for var in self.args]
File "/usr/local/lib/python3.6/site-packages/django/template/library.py" in <listcomp>
188. resolved_args = [var.resolve(context) for var in self.args]
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in resolve
708. obj = self.var.resolve(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in resolve
849. value = self._resolve_lookup(context)
File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in _resolve_lookup
890. current = getattr(current, bit)
File "/usr/local/lib/python3.6/site-packages/django/db/models/fields/files.py" in url
69. self._require_file()
File "/usr/local/lib/python3.6/site-packages/django/db/models/fields/files.py" in _require_file
46. raise ValueError("The '%s' attribute has no file associated with it." % self.field.name)
Exception Type: ValueError at /sites/site/files/7
Exception Value: The 'site_image' attribute has no file associated with it.
EDIT:
site_details_files:
#login_required
def site_detail_files(request, site_id):
files = SiteFiles.objects.filter(site_data__id=site_id)
try:
site = files[0].site_data
except:
site = get_object_or_404(SiteData, pk=site_id)
return render(request, 'sites/site_detail_files.html', {
'Files': files,
'SiteName' : site.location,
'SiteID' : site.id,
'PageType' : 'files',
'active_files' : 'class="active"',
})
template:
{% block content %}
<div class="col-lg-9">
<div class="panel panel-default">
<div class="panel-heading">
<i class="fa fa-camera fa-fw"></i> Photos
</div>
<div class="panel-body">
{% get_file_type Files 'Cabinet Photo' as photos %}
{% for file in photos %}
<div class="img-item">
<div class="img">
<a class="image-float-left" id="" href="{% signed_url file.site_image.url %}" target="_blank">
<img src="{% signed_url file.site_image_thumbnail.url %}" alt="" />
</a>
</div>
<div class="img-text">
{{ file.file_name }}
<div class="img-edit" >
<a href="{% url 'sites:edit_file' SiteID file.id %}" class="edit-icon">
<i class="fa fa-edit"></i>
</a>
</div>
</div>
</div>
<!-- /.img-item-->
{% endfor %}
</div>
<!-- /.panel-body-->
</div>
<!-- /.panel-->
</div>
<!-- /.col-lg-9 -->
<div class="col-lg-3">
<div class="panel panel-default">
<div class="panel-heading">
<i class="fa fa-file-text-o fa-fw"></i> Files
</div>
<div class="panel-body">
{% exclude_file_type Files 'Cabinet Photo' as site_files %}
{% for file in site_files %}
<ul>
{% if file.file_type != "Cabinet Photo" %}
{% if file.site_file %}
<li>
<a href="{% url 'sites:edit_file' SiteID file.id %}" class="edit-icon">
<i class="fa fa-edit fa-1x"></i>
</a>
{{ file.file_name }}
</li>
{% endif %}
{% if file.site_image %}
<li>
<a href="{{% url 'sites:edit_file' SiteID file.id %}" class="edit-icon">
<i class="fa fa-edit"></i>
</a>
{{ file.file_name }}
</li>
{% endif %}
{% endif %}
</ul>
{% endfor %}
</div>
<!-- /.panel-body-->
</div>
<!-- /.panel-->
</div>
<!-- /.col-lg-9 -->
{% endblock %}

You need to pass request.FILES to the form when uploading files.
form = FileForm(request.POST, request.FILES, instance=item_data)
Make sure that you set enctype="multipart/form-data" in the template as well.
See the docs on file uploads for more info.
However, these changes won't solve your error, since it is coming from a different view site_detail_files. It looks as if you are using file.site_image.url in the template without checking file.site_image first. You should add an extra if block:
{% for file in photos %}
...
{% if file.site_image %}
...
<a class="image-float-left" id="" href="{% signed_url file.site_image.url %}" target="_blank">
...
{% endif %}
{% endfor %}