I am making a simple todo list application but while adding a delete button, I am receiving the error. I tried many things searching on internet but couldn't solve the issue, probably because i am new to django.So, your help will be very important.

urls.py(of app):

from django.conf.urls import url
from django.urls import path
from . import views

urlpatterns=[
path('',views.home,name='home'),
url('delete/<str:id>', views.delete_data,name='deldata'),
]

views.py:

from django.shortcuts import get_object_or_404, render,redirect
from todo.models import value
from django.http import HttpResponseRedirect


# Create your views here.
from .forms import TitleForm
from django.urls import reverse




def home(request):
   values=value.objects.all()    
   form=TitleForm
   if request.method=='POST':
      form=TitleForm(request.POST)
      if form.is_valid():
        form.save()
        return redirect('/')
  else:
      form=TitleForm()
  return render(request,'home.html',{'values':values,'form':form})



 #delete

 def delete_data(request, id ):

    ggwp=value.objects.get(id=id)
    if request.method=="POST":
       ggwp=value.objects.get(id=id)
       ggwp.delete()
       return HttpResponseRedirect(reverse('deldata', kwargs={'id':id}))
    context={'ggwp':ggwp}
    return render(request,'/',context)

models.py:

from django.db import models

# Create your models here.
class value(models.Model):
   task=models.CharField(max_length=200)
   complete=models.BooleanField(default=False)
   created=models.DateTimeField(auto_now_add=True)

   def __str__(self):
       return self.task        

home.html(One and only html page):

<h3>TO DO LIST</h3>
<form method="POST" action="\">
   {% csrf_token %} 
   {{form.task}} <input type='submit' name='add' value="add" > 
</form>
{% for val in values %}
  {{val}}
  <form action="{% url 'deldata' val.id %}" method="POST" class="in-line">
      {% csrf_token %}
      <input type="submit" value="Delete" >
  </form>



{% endfor %}

traceback:

    raise NoReverseMatch(msg)
 django.urls.exceptions.NoReverseMatch: Reverse for 'deldata' with arguments '(15,)' not 
  found. 1 pattern(s) tried: ['delete/<str:id>']
 [05/Oct/2021 22:37:17] "GET / HTTP/1.1" 500 127858

Its my first question, so sorry if I have made any mistakes while writing the question.

CodePudding user response：

You are using *path(…) [Django-doc] syntax with the url(…) function [Django-doc]. You should work with a path(…) here:

urlpatterns=[
    path('',views.home,name='home'),
    # ↓ path, not url
    path('delete/<str:id>/', views.delete_data,name='deldata'),
]

Normally paths also end with a slash, altough that is not required, it is common.

Note: As of django-3.1, url(…) [Django-doc] is deprecated in favor of re_path(…) [Django-doc]. Furthermore a new syntax for paths has been introduced with path converters: you use path(…) [Django-doc] for that.