Django page not found 404, Raised by: blog.views.blog_postDetailView - django

Question

sometimes when i want to open the about page, the contact, create or blog
page this error comes: Raised by: blog.views.blog_postDetailView
i donnt know why, but I think it has to do sth with my urlpattterns
or the order of them . here my code.
appreciate your help and improvements
thanks a lot
mainurl
from django.conf.urls import url, include
from django.contrib import admin
from django.conf import settings
from django.conf.urls.static import static
from blog.views import AboutPageView, ContactPageView, blog_postCreateView
urlpatterns = [
url(r'^about/', AboutPageView.as_view(), name='about'),
url(r'^contact/', ContactPageView.as_view(), name='contact'),
url(r'^create/', blog_postCreateView.as_view(), name='blog_post_create'),
url(r'', include('blog.urls')),
url(r'^blog/', include('blog.urls')),
#admin and login
url(r'^admin/', admin.site.urls),
url(r'^accounts/', include('registration.backends.default.urls')),
]
if settings.DEBUG:
urlpatterns += static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)
urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
blog url
from django.conf.urls import url
from .views import blog_postListView, blog_postDetailView, blog_postCreateView
urlpatterns = [
url(r'^$', blog_postListView.as_view(), name='blog_post_list'),
url(r'^(?P<slug>[-\w]+)$', blog_postDetailView.as_view(), name='blog_post_detail'),
]
base html, the nav part
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav">
<li>
Home
</li>
<li>
About
</li>
<li>
Contact
</li>
<li>
Blog
</li>
<li>
{% if request.user.is_authenticated %}
<li>Logout</li>
{% else %}
<li>Login</li>
<li>Register</li>
{% endif %}
model
rom __future__ import unicode_literals
from django.conf import settings
from django.core.urlresolvers import reverse
from django.db import models
from django.db.models.signals import pre_save, post_save
from django.utils.text import slugify
# Create your models here.
def upload_location(instance, filename):
#filebase, extension = filename.split(".")
#return "%s/%s.%s" %(instance.id, instance.id, extension)
return "%s/%s" %(instance.id, filename)
class blog_post(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL, default=1)
title = models.CharField(max_length=120)
height_field = models.IntegerField(default=0)
width_field = models.IntegerField(default=0)
image = models.ImageField(upload_to=upload_location, null=True, blank=True, width_field="width_field", height_field="height_field")
#height_field = models.PositiveIntegerField()
#width_field = models.PositiveIntegerField()
slug = models.SlugField(unique=True)
content = models.TextField()
updated = models.DateTimeField(auto_now=True, auto_now_add=False)
timestamp = models.DateTimeField(auto_now=False, auto_now_add=True)
def __unicode__(self):
return self.title
def __str__(self):
return self.title
def get_absolute_url(self):
return reverse("blog_post_detail", kwargs={"slug": self.slug})
def create_slug(instance, new_slug=None):
slug = slugify(instance.title)
if new_slug is not None:
slug = new_slug
qs = blog_post.objects.filter(slug=slug).order_by("-id")
exists = qs.exists()
if exists:
new_slug = "%s-%s" %(slug, qs.first().id)
return create_slug(instance, new_slug=new_slug)
return slug
def pre_save_post_receiver(sender, instance, *args, **kwargs):
if not instance.slug:
instance.slug = create_slug(instance)
pre_save.connect(pre_save_post_receiver, sender=blog_post)
views
from django.contrib.auth.decorators import login_required
from django.core.urlresolvers import reverse
from django.http import HttpResponse
from django.views.generic import View
from django.views.generic.base import TemplateView, TemplateResponseMixin, ContextMixin
from django.views.generic.detail import DetailView
from django.views.generic.list import ListView
from django.views.generic.edit import CreateView, UpdateView, DeleteView
from django.shortcuts import render
from django.utils.decorators import method_decorator
from .models import blog_post
from .forms import blog_postForm
# Create your views here.
class LoginRequiredMixin(object):
#classmethod
def as_view(cls, **kwargs):
view = super(LoginRequiredMixin, cls).as_view(**kwargs)
return login_required(view)
##method_decorator(login_required)
#def dispatch(self, request, *args, **kwargs):
# return super(LoginRequiredMixin, self).dispatch(request, *args, **kwargs)
class blog_postCreateView(LoginRequiredMixin, CreateView):
#model = blog_post
form_class = blog_postForm
template_name = "form.html"
#fields = ["title", "content"]
def get_success_url(self):
return reverse("blog_post_list")
# #method_decorator(login_required)
# def dispatch(self, request, *args, **kwargs):
# return super(MyView, self).dispatch(request, *args, **kwargs)
class blog_postListView(ListView):
model = blog_post
def get_queryset(self, *args, **kwargs):
qs = super(blog_postListView, self).get_queryset(*args, **kwargs).order_by("-timestamp")
return qs
class blog_postDetailView(DetailView):
model = blog_post
class AboutPageView(TemplateView):
template_name = "about.html"
class ContactPageView(TemplateView):
template_name = "contact.html"
updated urls
from django.conf.urls import url, include
from django.contrib import admin
from django.conf import settings
from django.conf.urls.static import static
from blog.views import AboutPageView, ContactPageView, blog_postCreateView
urlpatterns = [
url(r'^about/', AboutPageView.as_view(), name='about'),
url(r'^contact/', ContactPageView.as_view(), name='contact'),
url(r'^create/', blog_postCreateView.as_view(), name='blog_post_create'),
url(r'^categories/', include('blog.urls_categories')),
#url(r'', include('blog.urls')),
url(r'^blog/', include('blog.urls')),
#admin and login
url(r'^admin/', admin.site.urls),
url(r'^accounts/', include('registration.backends.default.urls')),
url(r'', include('blog.urls')),
]
if settings.DEBUG:
urlpatterns += static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)
urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

Answer 1

Put the below line in end of url_patterns list like
urlpatterns = [
#all other urls,
url(r'', include('blog.urls')),
]
OR
url(r'^blogdetail/', include('blog.urls')),