error Reverse for 'article' not found. 'article' is not a valid view function or pattern name

Using Django
1

Hello!
Im getting an error to
Reverse for ‘article’ not found. ‘article’ is not a valid view function or pattern name/

When Im trying to edit an article, after editing it shows error. But the article will be changed.

When I press “edit”

screenshot.193
screenshot.1931417×846 92.1 KB

VIEWS.PY

from django.shortcuts import render,redirect
from django.http import HttpResponse
from django.urls import reverse_lazy

from .models import *
from .forms import ArticleForm
from django.views.generic import ListView,DetailView,UpdateView,CreateView,DeleteView
from django import forms


class HomeView(ListView):
    model = Article
    template_name = 'blog/index.html'
    context_object_name = 'articles'
    extra_context = {
        "main_page":'Main page'
    }



class CategoryView(ListView):
    model = Article
    template_name = 'blog/blogs.html'
    context_object_name = 'articles'

    def get_queryset(self):
        return Article.objects.filter(category_id=self.kwargs['pk'])

    def get_context_data(self, *, object_list=None, **kwargs):
        context = super().get_context_data()
        category= Category.objects.get(pk=self.kwargs['pk'])
        context['title'] = f'Category: {category.title}'
        return context


class ArticleView(DetailView):
    model = Article
    template_name = 'blog/article.html'
    context_object_name = 'article'

    def get_context_data(self, **kwargs):
        context = super().get_context_data()
        article = Article.objects.get(pk=self.kwargs['pk'])
        context['title'] = f'Title: {article.title}'
        return context


class BlogView(ListView):
    model = Article
    template_name = 'blog/blogs.html'
    context_object_name = 'articles'
    extra_context = {
        "main_page":'Main page'
    }


class AddArticle(CreateView):
    model = Article
    form_class = ArticleForm
    template_name = 'blog/article_form.html'
    extra_context = {
        'title':f'Create an article'
    }


class ArticleUpdate(UpdateView):
    model = Article
    form_class = ArticleForm
    template_name = 'blog/article_form.html'
    extra_context = {
        'title':'Edit the article'
    }

URLS.PY

from django.urls import path
from .views import *


urlpatterns = [

    path('', HomeView.as_view() ,name='homescreen'),

    path('category/<int:pk>/',CategoryView.as_view(),name='category-view'),

    path('article/<int:pk>/',ArticleView.as_view(),name='article-view'),

    path('blogs/',BlogView.as_view(),name='blogs'),

    path('add-article',AddArticle.as_view(),name='add-article'),
    path('article/<int:pk>/edit-article/',ArticleUpdate.as_view(),name='edit-article'),
    path('article/<int:pk>/delete/',ArticleDelete.as_view(),name='delete')
]

MODELS.PY:

from django.db import models
from django.urls import reverse

# Create your models here.


class Category(models.Model):
    title = models.CharField(blank=True,max_length=255,verbose_name='Name of the category')


    def get_absolute_url(self):
        return reverse('category',kwargs={"pk":self.pk})


    def __str__(self):
        return self.title

    class Meta:
        verbose_name = 'Category'
        verbose_name_plural = 'Categories'


class Article(models.Model):
    title = models.CharField(max_length=255,blank=False)
    description = models.TextField(default='Type your text',verbose_name='description')
    created_at = models.DateTimeField(auto_now_add=True,verbose_name='Added at ')
    updated_at=models.DateTimeField(auto_now=True,verbose_name='Updated at ')
    image = models.ImageField(upload_to='images/',blank=True)
    views = models.PositiveIntegerField(default=0,verbose_name='Views')

    category = models.ForeignKey(Category,on_delete=models.CASCADE,verbose_name='Category',null=True)

    def __str__(self):
        return self.title

    def get_absolute_url(self):
        return reverse('article',kwargs={'pk':self.pk})



    class Meta:
        verbose_name='Article'
        verbose_name_plural='Articles'

article.html

{% extends 'base.html' %}
{% load static %}

{% block title %}
{{ title }}

{% endblock title %}

{% block main %}

<div class="container">
    {% if article.image %}
    <img height="200px" src="{{ article.image.url }}" alt="">
    {% else %}
    <img height="200px" src="https://media.istockphoto.com/id/1354826805/vector/data-science.jpg?s=612x612&w=0&k=20&c=FKYxpsaWX7H5_DEX4t0dV2o837_aqgoavlIRdIz1jwE=" alt="">
    {% endif %}

    <h3>{{ article.title }}</h3>
    <span>{{ article.description|linebreaks }}</span>
    <p> {{ article.created_at }} </p>
    <span> | Views:  {{ article.views }} </span>

    <a href="{% url 'edit-article' article.pk %}" class="btn btn-outline-success">Edit</a>
    <a href="{% url 'delete' article.pk %}" class="btn btn-outline-success">Delete</a>


</div>


{% endblock main %}

However, getting an error:

screenshot.193
screenshot.1931892×856 185 KB

2

The issue has been solved!

on model.py

instead of

   def get_absolute_url(self):
        return reverse('article',kwargs={'pk':self.pk})

I wrote:

    def get_absolute_url(self):
        return reverse('article-view', kwargs={'pk':self.pk})       # article-view - is the route name