Page Not Found django

Question

Why is this happening? I do everything according to the instructions. I study.

urls.py

from django.conf.urls import url,include
from django.contrib import admin
from . import views 
urlpatterns = [
    #url(r'^$',views.main,name="main"),
    url(r'^post/(?P<id>[0-9]+)/', views.post_detail, name='post_detail'),
]

views.py

from django.shortcuts import render
from django.utils import timezone
from .models import Post
from django.shortcuts import render, get_object_or_404
# Create your views here.

def post_detail(request,id):
    post = get_object_or_404(Post, pk=id)
    return render(request, 'main/post_detail.html', {'post': post})

post_detail.html

{% extends 'main/base.html' %}

{% block content %}
    <div class="post">
        {% if post.published_date %}
            <div class="date">
                {{ post.published_date }}
            </div>
        {% endif %}
        <h1>{{ post.title }}</h1>
        <p>{{ post.text|linebreaksbr }}</p>
    </div>
{% endblock %}

What to do? Even instead of id put pk, but nothing helps.

Answer 1

Your urls.py file should work (it worked for me) but you should end this url with $ to prevent matching urls with something after product id with this view.

url(r'^post/(?P<id>[0-9]+)/$', views.post_detail, name='post_detail'),

You can use pdb in post_detail method to check is called:

def post_detail(request,id):
    import pdb
    pdb.set_trace()
    post = get_object_or_404(Post, pk=id)
    return render(request, 'main/post_detail.html', {'post': post})

If method is called that execution should stop on pdb.set_trace() line. You can resume it with pressing 'c' and ENTER. pdb is very useful and you should use it first when you have a problem. (Mode details: https://docs.python.org/2/library/pdb.html)

If method is called that it should be problem with lack of post with given id, Otherwise you should make sure that ROOT_URLCONF from settings are referencing this module.

To check is post with this id existing:

Try this command in django shell:

Post.objects.get(pk=1)

if it returns

Post.DoesNotExist

than you need to create this post using:

Post.objects.create(pk=1, **some_values)