Add a news app, and enable commenting

news/admin.py

@@ -0,0 +1,4 @@
+import models
+from django.contrib import admin
+
+admin.site.register(models.Post)

news/models.py

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+from django.db import models
+from django.contrib.auth.models import User
+
+def unique_slug(item,slug_source,slug_field):
+  """Ensures a unique slug field by appending an integer counter to duplicate slugs.
+  
+  The item's slug field is first prepopulated by slugify-ing the source field. If that value already exists, a counter is appended to the slug, and the counter incremented upward until the value is unique.
+  
+  For instance, if you save an object titled Daily Roundup, and the slug daily-roundup is already taken, this function will try daily-roundup-2, daily-roundup-3, daily-roundup-4, etc, until a unique value is found.
+  
+  Call from within a model's custom save() method like so:
+  unique_slug(item, slug_source='field1', slug_field='field2')
+  where the value of field slug_source will be used to prepopulate the value of slug_field.
+  """
+  if not getattr(item, slug_field): # if it's already got a slug, do nothing.
+      from django.template.defaultfilters import slugify
+      slug = slugify(getattr(item,slug_source))
+      itemModel = item.__class__
+      # the following gets all existing slug values
+      allSlugs = [sl.values()[0] for sl in itemModel.objects.values(slug_field)]
+      if slug in allSlugs:
+          import re
+          counterFinder = re.compile(r'-\d+$')
+          counter = 2
+          slug = "%s-%i" % (slug, counter)
+          while slug in allSlugs:
+              slug = re.sub(counterFinder,"-%i" % counter, slug)
+              counter += 1
+      setattr(item,slug_field,slug)
+
+class Post(models.Model):
+    title = models.CharField(max_length=100)
+    body = models.TextField()
+    slug = models.SlugField(blank=True)
+    author = models.ForeignKey(User, related_name='news_posts')
+    created = models.DateTimeField(editable=False, auto_now_add=True)
+    updated = models.DateTimeField(editable=False, auto_now=True)
+
+    def __unicode__(self):
+        return self.title
+
+    @models.permalink
+    def get_absolute_url(self):
+        return ('news.views.view', [], {'slug':self.slug})
+
+    def save(self, *args, **kwargs):
+        unique_slug(self, slug_source='title', slug_field='slug')
+        super(Post, self).save(*args, **kwargs)

news/tests.py

@@ -0,0 +1,16 @@
+"""
+This file demonstrates writing tests using the unittest module. These will pass
+when you run "manage.py test".
+
+Replace this with more appropriate tests for your application.
+"""
+
+from django.test import TestCase
+
+
+class SimpleTest(TestCase):
+    def test_basic_addition(self):
+        """
+        Tests that 1 + 1 always equals 2.
+        """
+        self.assertEqual(1 + 1, 2)

news/urls.py

@@ -0,0 +1,7 @@
+from django.conf.urls.defaults import patterns, include, url
+
+urlpatterns = patterns('news',
+    url('^$', 'views.index'),
+    url('^(?P<page>[0-9]+)$', 'views.index'),
+    url('^(?P<slug>.*)$', 'views.view')
+)

news/views.py

@@ -0,0 +1,17 @@
+import models
+from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
+from django.shortcuts import render_to_response
+from django.template import RequestContext
+
+def index(request, page=0):
+    all_news = models.Post.objects.all()
+    paginator = Paginator(all_news, 25)
+    try: 
+        items = paginator.page(page)
+    except EmptyPage:
+        items = paginator.page(paginator.num_pages)
+    return render_to_response('news/index.html', {'items':items}, context_instance = RequestContext(request))
+
+def view(request, slug):
+    item = models.Post.objects.get(slug__exact=slug)
+    return render_to_response('news/view.html', {'item':item}, context_instance = RequestContext(request))

templates/news/index.html

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+{% extends 'base.html' %}
+{% load markup %}
+{% load comments %}
+
+{% block title %}News{% endblock %}
+
+{% block content %}
+{% for post in items.object_list %}
+<h2><a href="{{post.get_absolute_url}}">{{post.title}}</a></h2>
+<div class="byline">By {{post.author}}</div>
+<div class="content">
+    {{post.body|markdown}}
+</div>
+<div class="commentcount">{% get_comment_count for post as comment_count %}{{comment_count}} comments.</div>
+{% endfor %}
+{% endblock %}

templates/news/view.html

@@ -0,0 +1,34 @@
+{% extends 'base.html' %}
+{% load markup %}
+{% load comments %}
+{% block title %}News - {{item.title}}{% endblock %}
+
+{% block content %}
+<h2><a href="{{post.get_absolute_url}}">{{post.title}}</a></h2>
+<div class="byline">By {{item.author}}</div>
+<div class="content">
+    {{item.body|markdown}}
+</div>
+<div class="commentcount">{% get_comment_count for item as comment_count %}{{comment_count}} comments.</div>
+<div class="comments">
+{% if comment_count > 0 %}
+<h3>Comments</h3>
+{% get_comment_list for item as comment_list %}
+{% for comment in comment_list %}
+    <a name="c{{ comment.id }}" href="{% get_comment_permalink comment %}">#{{comment.id}}</a> by {{comment.user}}
+    <div class="comment">
+        {{comment.comment|markdown:"safe"}}
+    </div>
+{% endfor %}
+{% endif %}
+{% get_comment_form for item as form %}
+<h4>Add a comment</h4>
+<form action="{% comment_form_target %}" method="post">
+{% csrf_token %}
+{{ form.as_p }}
+<input type="submit" name="submit" value="Post">
+<input type="submit" name="preview" value="Preview">
+<input type="hidden" name="next" value="{{post.get_absolute_url}}" />
+</form>
+</div>
+{% endblock %}

urls.py

@@ -6,6 +6,8 @@ admin.autodiscover()
 
 urlpatterns = patterns('',
     url(r'^$', 'forums.views.index', name='home'),
+    url(r'^comments/', include('django.contrib.comments.urls')),
+    url(r'^news/', include('news.urls')),
     url(r'^profiles/', include('profiles.urls')),
     url(r'^admin/doc/', include('django.contrib.admindocs.urls')),
     url(r'^admin/', include(admin.site.urls)),