philo/contrib/penfield/models.py

   1 from datetime import date, datetime
   2
   3 from django.conf import settings
   4 from django.conf.urls.defaults import url, patterns, include
   5 from django.db import models
   6 from django.http import Http404, HttpResponse
   7 from taggit.managers import TaggableManager
   8 from taggit.models import Tag, TaggedItem
   9
  10 from philo.contrib.winer.models import FeedView
  11 from philo.exceptions import ViewCanNotProvideSubpath
  12 from philo.models import Entity, Page, register_value_model
  13 from philo.models.fields import TemplateField
  14 from philo.utils import paginate
  15
  16
  17 class Blog(Entity):
  18         """Represents a blog which can be posted to."""
  19         #: The name of the :class:`Blog`, currently called 'title' for historical reasons.
  20         title = models.CharField(max_length=255)
  21
  22         #: A slug used to identify the :class:`Blog`.
  23         slug = models.SlugField(max_length=255)
  24
  25         def __unicode__(self):
  26                 return self.title
  27
  28         @property
  29         def entry_tags(self):
  30                 """Returns a :class:`QuerySet` of :class:`.Tag`\ s that are used on any entries in this blog."""
  31                 entry_pks = list(self.entries.values_list('pk', flat=True))
  32                 kwargs = {
  33                         '%s__object_id__in' % TaggedItem.tag_relname(): entry_pks
  34                 }
  35                 return TaggedItem.tags_for(BlogEntry).filter(**kwargs)
  36
  37         @property
  38         def entry_dates(self):
  39                 """Returns a dictionary of date :class:`QuerySet`\ s for years, months, and days for which there are entries."""
  40                 dates = {'year': self.entries.dates('date', 'year', order='DESC'), 'month': self.entries.dates('date', 'month', order='DESC'), 'day': self.entries.dates('date', 'day', order='DESC')}
  41                 return dates
  42
  43
  44 register_value_model(Blog)
  45
  46
  47 class BlogEntry(Entity):
  48         """Represents an entry in a :class:`Blog`."""
  49         #: The title of the :class:`BlogEntry`.
  50         title = models.CharField(max_length=255)
  51
  52         #: A slug which identifies the :class:`BlogEntry`.
  53         slug = models.SlugField(max_length=255)
  54
  55         #: The :class:`Blog` which this entry has been posted to. Can be left blank to represent a "draft" status.
  56         blog = models.ForeignKey(Blog, related_name='entries', blank=True, null=True)
  57
  58         #: A :class:`ForeignKey` to the author. The model is either :setting:`PHILO_PERSON_MODULE` or :class:`auth.User`.
  59         author = models.ForeignKey(getattr(settings, 'PHILO_PERSON_MODULE', 'auth.User'), related_name='blogentries')
  60
  61         #: The date and time which the :class:`BlogEntry` is considered posted at.
  62         date = models.DateTimeField(default=None)
  63
  64         #: The content of the :class:`BlogEntry`.
  65         content = models.TextField()
  66
  67         #: An optional brief excerpt from the :class:`BlogEntry`.
  68         excerpt = models.TextField(blank=True, null=True)
  69
  70         #: A ``django-taggit`` :class:`TaggableManager`.
  71         tags = TaggableManager()
  72
  73         def save(self, *args, **kwargs):
  74                 if self.date is None:
  75                         self.date = datetime.now()
  76                 super(BlogEntry, self).save(*args, **kwargs)
  77
  78         def __unicode__(self):
  79                 return self.title
  80
  81         class Meta:
  82                 ordering = ['-date']
  83                 verbose_name_plural = "blog entries"
  84                 get_latest_by = "date"
  85
  86
  87 register_value_model(BlogEntry)
  88
  89
  90 class BlogView(FeedView):
  91         """
  92         A subclass of :class:`.FeedView` which handles patterns and feeds for a :class:`Blog` and its related :class:`entries <BlogEntry>`.
  93
  94         """
  95         ENTRY_PERMALINK_STYLE_CHOICES = (
  96                 ('D', 'Year, month, and day'),
  97                 ('M', 'Year and month'),
  98                 ('Y', 'Year'),
  99                 ('B', 'Custom base'),
 100                 ('N', 'No base')
 101         )
 102
 103         #: The :class:`Blog` whose entries should be managed by this :class:`BlogView`
 104         blog = models.ForeignKey(Blog, related_name='blogviews')
 105
 106         #: The main page of the :class:`Blog` will be rendered with this :class:`.Page`.
 107         index_page = models.ForeignKey(Page, related_name='blog_index_related')
 108         #: The detail view of a :class:`BlogEntry` will be rendered with this :class:`Page`.
 109         entry_page = models.ForeignKey(Page, related_name='blog_entry_related')
 110         # TODO: entry_archive is misleading. Rename to ymd_page or timespan_page.
 111         #: Views of :class:`BlogEntry` archives will be rendered with this :class:`Page` (optional).
 112         entry_archive_page = models.ForeignKey(Page, related_name='blog_entry_archive_related', null=True, blank=True)
 113         #: Views of :class:`BlogEntry` archives according to their :class:`.Tag`\ s will be rendered with this :class:`Page`.
 114         tag_page = models.ForeignKey(Page, related_name='blog_tag_related')
 115         #: The archive of all available tags will be rendered with this :class:`Page` (optional).
 116         tag_archive_page = models.ForeignKey(Page, related_name='blog_tag_archive_related', null=True, blank=True)
 117         #: This number will be passed directly into pagination for :class:`BlogEntry` list pages. Pagination will be disabled if this is left blank.
 118         entries_per_page = models.IntegerField(blank=True, null=True)
 119
 120         #: Depending on the needs of the site, different permalink styles may be appropriate. Example subpaths are provided for a :class:`BlogEntry` posted on May 2nd, 2011 with a slug of "hello". The choices are:
 121         #:
 122         #:      * Year, month, and day - ``2011/05/02/hello``
 123         #:      * Year and month - ``2011/05/hello``
 124         #:      * Year - ``2011/hello``
 125         #:      * Custom base - :attr:`entry_permalink_base`\ ``/hello``
 126         #:      * No base - ``hello``
 127         entry_permalink_style = models.CharField(max_length=1, choices=ENTRY_PERMALINK_STYLE_CHOICES)
 128         #: If the :attr:`entry_permalink_style` is set to "Custom base" then the value of this field will be used as the base subpath for year/month/day entry archive pages and entry detail pages. Default: "entries"
 129         entry_permalink_base = models.CharField(max_length=255, blank=False, default='entries')
 130         #: This will be used as the base for the views of :attr:`tag_page` and :attr:`tag_archive_page`. Default: "tags"
 131         tag_permalink_base = models.CharField(max_length=255, blank=False, default='tags')
 132
 133         item_context_var = 'entries'
 134         object_attr = 'blog'
 135
 136         def __unicode__(self):
 137                 return u'BlogView for %s' % self.blog.title
 138
 139         def get_reverse_params(self, obj):
 140                 if isinstance(obj, BlogEntry):
 141                         if obj.blog_id == self.blog_id:
 142                                 kwargs = {'slug': obj.slug}
 143                                 if self.entry_permalink_style in 'DMY':
 144                                         kwargs.update({'year': str(obj.date.year).zfill(4)})
 145                                         if self.entry_permalink_style in 'DM':
 146                                                 kwargs.update({'month': str(obj.date.month).zfill(2)})
 147                                                 if self.entry_permalink_style == 'D':
 148                                                         kwargs.update({'day': str(obj.date.day).zfill(2)})
 149                                 return self.entry_view, [], kwargs
 150                 elif isinstance(obj, Tag) or (isinstance(obj, models.query.QuerySet) and obj.model == Tag and obj):
 151                         if isinstance(obj, Tag):
 152                                 obj = [obj]
 153                         slugs = [tag.slug for tag in obj if tag in self.get_tag_queryset(self.blog)]
 154                         if slugs:
 155                                 return 'entries_by_tag', [], {'tag_slugs': "/".join(slugs)}
 156                 elif isinstance(obj, (date, datetime)):
 157                         kwargs = {
 158                                 'year': str(obj.year).zfill(4),
 159                                 'month': str(obj.month).zfill(2),
 160                                 'day': str(obj.day).zfill(2)
 161                         }
 162                         return 'entries_by_day', [], kwargs
 163                 raise ViewCanNotProvideSubpath
 164
 165         @property
 166         def urlpatterns(self):
 167                 urlpatterns = self.feed_patterns(r'^', 'get_all_entries', 'index_page', 'index') +\
 168                         self.feed_patterns(r'^%s/(?P<tag_slugs>[-\w]+[-+/\w]*)' % self.tag_permalink_base, 'get_entries_by_tag', 'tag_page', 'entries_by_tag')
 169
 170                 if self.tag_archive_page_id:
 171                         urlpatterns += patterns('',
 172                                 url((r'^%s$' % self.tag_permalink_base), self.tag_archive_view, name='tag_archive')
 173                         )
 174
 175                 if self.entry_archive_page_id:
 176                         if self.entry_permalink_style in 'DMY':
 177                                 urlpatterns += self.feed_patterns(r'^(?P<year>\d{4})', 'get_entries_by_ymd', 'entry_archive_page', 'entries_by_year')
 178                                 if self.entry_permalink_style in 'DM':
 179                                         urlpatterns += self.feed_patterns(r'^(?P<year>\d{4})/(?P<month>\d{2})', 'get_entries_by_ymd', 'entry_archive_page', 'entries_by_month')
 180                                         if self.entry_permalink_style == 'D':
 181                                                 urlpatterns += self.feed_patterns(r'^(?P<year>\d{4})/(?P<month>\d{2})/(?P<day>\d{2})', 'get_entries_by_ymd', 'entry_archive_page', 'entries_by_day')
 182
 183                 if self.entry_permalink_style == 'D':
 184                         urlpatterns += patterns('',
 185                                 url(r'^(?P<year>\d{4})/(?P<month>\d{2})/(?P<day>\d{2})/(?P<slug>[-\w]+)$', self.entry_view)
 186                         )
 187                 elif self.entry_permalink_style == 'M':
 188                         urlpatterns += patterns('',
 189                                 url(r'^(?P<year>\d{4})/(?P<month>\d{2})/(?P<slug>[-\w]+)$', self.entry_view)
 190                         )
 191                 elif self.entry_permalink_style == 'Y':
 192                         urlpatterns += patterns('',
 193                                 url(r'^(?P<year>\d{4})/(?P<slug>[-\w]+)$', self.entry_view)
 194                         )
 195                 elif self.entry_permalink_style == 'B':
 196                         urlpatterns += patterns('',
 197                                 url((r'^%s/(?P<slug>[-\w]+)$' % self.entry_permalink_base), self.entry_view)
 198                         )
 199                 else:
 200                         urlpatterns += patterns('',
 201                                 url(r'^(?P<slug>[-\w]+)$', self.entry_view)
 202                         )
 203                 return urlpatterns
 204
 205         def get_context(self):
 206                 return {'blog': self.blog}
 207
 208         def get_entry_queryset(self, obj):
 209                 """Returns the default :class:`QuerySet` of :class:`BlogEntry` instances for the :class:`BlogView` - all entries that are considered posted in the past. This allows for scheduled posting of entries."""
 210                 return obj.entries.filter(date__lte=datetime.now())
 211
 212         def get_tag_queryset(self, obj):
 213                 """Returns the default :class:`QuerySet` of :class:`.Tag`\ s for the :class:`BlogView`'s :meth:`get_entries_by_tag` and :meth:`tag_archive_view`."""
 214                 return obj.entry_tags
 215
 216         def get_all_entries(self, obj, request, extra_context=None):
 217                 """Used to generate :meth:`~.FeedView.feed_patterns` for all entries."""
 218                 return self.get_entry_queryset(obj), extra_context
 219
 220         def get_entries_by_ymd(self, obj, request, year=None, month=None, day=None, extra_context=None):
 221                 """Used to generate :meth:`~.FeedView.feed_patterns` for entries with a specific year, month, and day."""
 222                 if not self.entry_archive_page:
 223                         raise Http404
 224                 entries = self.get_entry_queryset(obj)
 225                 if year:
 226                         entries = entries.filter(date__year=year)
 227                 if month:
 228                         entries = entries.filter(date__month=month)
 229                 if day:
 230                         entries = entries.filter(date__day=day)
 231
 232                 context = extra_context or {}
 233                 context.update({'year': year, 'month': month, 'day': day})
 234                 return entries, context
 235
 236         def get_entries_by_tag(self, obj, request, tag_slugs, extra_context=None):
 237                 """Used to generate :meth:`~.FeedView.feed_patterns` for entries with all of the given tags."""
 238                 tag_slugs = tag_slugs.replace('+', '/').split('/')
 239                 tags = self.get_tag_queryset(obj).filter(slug__in=tag_slugs)
 240
 241                 if not tags:
 242                         raise Http404
 243
 244                 # Raise a 404 on an incorrect slug.
 245                 found_slugs = [tag.slug for tag in tags]
 246                 for slug in tag_slugs:
 247                         if slug and slug not in found_slugs:
 248                                 raise Http404
 249
 250                 entries = self.get_entry_queryset(obj)
 251                 for tag in tags:
 252                         entries = entries.filter(tags=tag)
 253
 254                 context = extra_context or {}
 255                 context.update({'tags': tags})
 256
 257                 return entries, context
 258
 259         def entry_view(self, request, slug, year=None, month=None, day=None, extra_context=None):
 260                 """Renders :attr:`entry_page` with the entry specified by the given parameters."""
 261                 entries = self.get_entry_queryset(self.blog)
 262                 if year:
 263                         entries = entries.filter(date__year=year)
 264                 if month:
 265                         entries = entries.filter(date__month=month)
 266                 if day:
 267                         entries = entries.filter(date__day=day)
 268                 try:
 269                         entry = entries.get(slug=slug)
 270                 except:
 271                         raise Http404
 272                 context = self.get_context()
 273                 context.update(extra_context or {})
 274                 context.update({'entry': entry})
 275                 return self.entry_page.render_to_response(request, extra_context=context)
 276
 277         def tag_archive_view(self, request, extra_context=None):
 278                 """Renders :attr:`tag_archive_page` with the result of :meth:`get_tag_queryset` added to the context."""
 279                 if not self.tag_archive_page:
 280                         raise Http404
 281                 context = self.get_context()
 282                 context.update(extra_context or {})
 283                 context.update({
 284                         'tags': self.get_tag_queryset(self.blog)
 285                 })
 286                 return self.tag_archive_page.render_to_response(request, extra_context=context)
 287
 288         def feed_view(self, get_items_attr, reverse_name, feed_type=None):
 289                 """Overrides :meth:`.FeedView.feed_view` to add :class:`.Tag`\ s to the feed as categories."""
 290                 get_items = callable(get_items_attr) and get_items_attr or getattr(self, get_items_attr)
 291
 292                 def inner(request, extra_context=None, *args, **kwargs):
 293                         obj = self.get_object(request, *args, **kwargs)
 294                         feed = self.get_feed(obj, request, reverse_name, feed_type, *args, **kwargs)
 295                         items, extra_context = get_items(request, extra_context=extra_context, *args, **kwargs)
 296                         self.populate_feed(feed, items, request)
 297
 298                         if 'tags' in extra_context:
 299                                 tags = extra_context['tags']
 300                                 feed.feed['link'] = request.node.construct_url(self.reverse(obj=tags), with_domain=True, request=request, secure=request.is_secure())
 301                         else:
 302                                 tags = obj.entry_tags
 303
 304                         feed.feed['categories'] = [tag.name for tag in tags]
 305
 306                         response = HttpResponse(mimetype=feed.mime_type)
 307                         feed.write(response, 'utf-8')
 308                         return response
 309
 310                 return inner
 311
 312         def process_page_items(self, request, items):
 313                 """Overrides :meth:`.FeedView.process_page_items` to add pagination."""
 314                 if self.entries_per_page:
 315                         page_num = request.GET.get('page', 1)
 316                         paginator, paginated_page, items = paginate(items, self.entries_per_page, page_num)
 317                         item_context = {
 318                                 'paginator': paginator,
 319                                 'paginated_page': paginated_page,
 320                                 self.item_context_var: items
 321                         }
 322                 else:
 323                         item_context = {
 324                                 self.item_context_var: items
 325                         }
 326                 return items, item_context
 327
 328         def title(self, obj):
 329                 return obj.title
 330
 331         def item_title(self, item):
 332                 return item.title
 333
 334         def item_description(self, item):
 335                 return item.content
 336
 337         def item_author_name(self, item):
 338                 return item.author.get_full_name()
 339
 340         def item_pubdate(self, item):
 341                 return item.date
 342
 343         def item_categories(self, item):
 344                 return [tag.name for tag in item.tags.all()]
 345
 346
 347 class Newsletter(Entity):
 348         """Represents a newsletter which will contain :class:`articles <NewsletterArticle>` organized into :class:`issues <NewsletterIssue>`."""
 349         #: The name of the :class:`Newsletter`, currently callse 'title' for historical reasons.
 350         title = models.CharField(max_length=255)
 351         #: A slug used to identify the :class:`Newsletter`.
 352         slug = models.SlugField(max_length=255)
 353
 354         def __unicode__(self):
 355                 return self.title
 356
 357
 358 register_value_model(Newsletter)
 359
 360
 361 class NewsletterArticle(Entity):
 362         """Represents an article in a :class:`Newsletter`"""
 363         #: The title of the :class:`NewsletterArticle`.
 364         title = models.CharField(max_length=255)
 365         #: A slug which identifies the :class:`NewsletterArticle`.
 366         slug = models.SlugField(max_length=255)
 367         #: A :class:`ForeignKey` to :class:`Newsletter` representing the newsletter which this article was written for.
 368         newsletter = models.ForeignKey(Newsletter, related_name='articles')
 369         #: A :class:`ManyToManyField` to the author(s) of the :class:`NewsletterArticle`. The model is either :setting:`PHILO_PERSON_MODULE` or :class:`auth.User`.
 370         authors = models.ManyToManyField(getattr(settings, 'PHILO_PERSON_MODULE', 'auth.User'), related_name='newsletterarticles')
 371         #: The date and time which the :class:`NewsletterArticle` is considered published at.
 372         date = models.DateTimeField(default=None)
 373         #: A :class:`.TemplateField` containing an optional short summary of the article, meant to grab a reader's attention and draw them in.
 374         lede = TemplateField(null=True, blank=True, verbose_name='Summary')
 375         #: A :class:`.TemplateField` containing the full text of the article.
 376         full_text = TemplateField(db_index=True)
 377         #: A ``django-taggit`` :class:`TaggableManager`.
 378         tags = TaggableManager()
 379
 380         def save(self, *args, **kwargs):
 381                 if self.date is None:
 382                         self.date = datetime.now()
 383                 super(NewsletterArticle, self).save(*args, **kwargs)
 384
 385         def __unicode__(self):
 386                 return self.title
 387
 388         class Meta:
 389                 get_latest_by = 'date'
 390                 ordering = ['-date']
 391                 unique_together = (('newsletter', 'slug'),)
 392
 393
 394 register_value_model(NewsletterArticle)
 395
 396
 397 class NewsletterIssue(Entity):
 398         """Represents an issue of the newsletter."""
 399         #: The title of the :class:`NewsletterIssue`.
 400         title = models.CharField(max_length=255)
 401         #: A slug which identifies the :class:`NewsletterIssue`.
 402         slug = models.SlugField(max_length=255)
 403         #: A :class:`ForeignKey` to the :class:`Newsletter` which this issue belongs to.
 404         newsletter = models.ForeignKey(Newsletter, related_name='issues')
 405         #: The numbering of the issue - for example, 04.02 for volume 4, issue 2. This is an instance of :class:`CharField` to allow any arbitrary numbering system.
 406         numbering = models.CharField(max_length=50, help_text='For example, 04.02 for volume 4, issue 2.')
 407         #: A :class:`ManyToManyField` to articles belonging to this issue.
 408         articles = models.ManyToManyField(NewsletterArticle, related_name='issues')
 409
 410         def __unicode__(self):
 411                 return self.title
 412
 413         class Meta:
 414                 ordering = ['-numbering']
 415                 unique_together = (('newsletter', 'numbering'),)
 416
 417
 418 register_value_model(NewsletterIssue)
 419
 420
 421 class NewsletterView(FeedView):
 422         """A subclass of :class:`.FeedView` which handles patterns and feeds for a :class:`Newsletter` and its related :class:`articles <NewsletterArticle>`."""
 423         ARTICLE_PERMALINK_STYLE_CHOICES = (
 424                 ('D', 'Year, month, and day'),
 425                 ('M', 'Year and month'),
 426                 ('Y', 'Year'),
 427                 ('S', 'Slug only')
 428         )
 429
 430         #: A :class:`ForeignKey` to the :class:`Newsletter` managed by this :class:`NewsletterView`.
 431         newsletter = models.ForeignKey(Newsletter, related_name='newsletterviews')
 432
 433         #: A :class:`ForeignKey` to the :class:`Page` used to render the main page of this :class:`NewsletterView`.
 434         index_page = models.ForeignKey(Page, related_name='newsletter_index_related')
 435         #: A :class:`ForeignKey` to the :class:`Page` used to render the detail view of a :class:`NewsletterArticle` for this :class:`NewsletterView`.
 436         article_page = models.ForeignKey(Page, related_name='newsletter_article_related')
 437         #: A :class:`ForeignKey` to the :class:`Page` used to render the :class:`NewsletterArticle` archive pages for this :class:`NewsletterView`.
 438         article_archive_page = models.ForeignKey(Page, related_name='newsletter_article_archive_related', null=True, blank=True)
 439         #: A :class:`ForeignKey` to the :class:`Page` used to render the detail view of a :class:`NewsletterIssue` for this :class:`NewsletterView`.
 440         issue_page = models.ForeignKey(Page, related_name='newsletter_issue_related')
 441         #: A :class:`ForeignKey` to the :class:`Page` used to render the :class:`NewsletterIssue` archive pages for this :class:`NewsletterView`.
 442         issue_archive_page = models.ForeignKey(Page, related_name='newsletter_issue_archive_related', null=True, blank=True)
 443
 444         #: Depending on the needs of the site, different permalink styles may be appropriate. Example subpaths are provided for a :class:`NewsletterArticle` posted on May 2nd, 2011 with a slug of "hello". The choices are:
 445         #:
 446         #:      * Year, month, and day - :attr:`article_permalink_base`\ ``/2011/05/02/hello``
 447         #:      * Year and month - :attr:`article_permalink_base`\ ``/2011/05/hello``
 448         #:      * Year - :attr:`article_permalink_base`\ ``/2011/hello``
 449         #:      * Slug only - :attr:`article_permalink_base`\ ``/hello``
 450         article_permalink_style = models.CharField(max_length=1, choices=ARTICLE_PERMALINK_STYLE_CHOICES)
 451         #: This will be used as the base subpath for year/month/day article archive pages and article detail pages. Default: "articles"
 452         article_permalink_base = models.CharField(max_length=255, blank=False, default='articles')
 453         #: This will be used as the base subpath for issue detail pages and the issue archive page.
 454         issue_permalink_base = models.CharField(max_length=255, blank=False, default='issues')
 455
 456         item_context_var = 'articles'
 457         object_attr = 'newsletter'
 458
 459         def __unicode__(self):
 460                 return "NewsletterView for %s" % self.newsletter.__unicode__()
 461
 462         def get_reverse_params(self, obj):
 463                 if isinstance(obj, NewsletterArticle):
 464                         if obj.newsletter_id == self.newsletter_id:
 465                                 kwargs = {'slug': obj.slug}
 466                                 if self.article_permalink_style in 'DMY':
 467                                         kwargs.update({'year': str(obj.date.year).zfill(4)})
 468                                         if self.article_permalink_style in 'DM':
 469                                                 kwargs.update({'month': str(obj.date.month).zfill(2)})
 470                                                 if self.article_permalink_style == 'D':
 471                                                         kwargs.update({'day': str(obj.date.day).zfill(2)})
 472                                 return self.article_view, [], kwargs
 473                 elif isinstance(obj, NewsletterIssue):
 474                         if obj.newsletter_id == self.newsletter_id:
 475                                 return 'issue', [], {'numbering': obj.numbering}
 476                 elif isinstance(obj, (date, datetime)):
 477                         kwargs = {
 478                                 'year': str(obj.year).zfill(4),
 479                                 'month': str(obj.month).zfill(2),
 480                                 'day': str(obj.day).zfill(2)
 481                         }
 482                         return 'articles_by_day', [], kwargs
 483                 raise ViewCanNotProvideSubpath
 484
 485         @property
 486         def urlpatterns(self):
 487                 urlpatterns = self.feed_patterns(r'^', 'get_all_articles', 'index_page', 'index') + patterns('',
 488                         url(r'^%s/(?P<numbering>.+)$' % self.issue_permalink_base, self.page_view('get_articles_by_issue', 'issue_page'), name='issue')
 489                 )
 490                 if self.issue_archive_page_id:
 491                         urlpatterns += patterns('',
 492                                 url(r'^%s$' % self.issue_permalink_base, self.issue_archive_view, 'issue_archive')
 493                         )
 494                 if self.article_archive_page_id:
 495                         urlpatterns += self.feed_patterns(r'^%s' % self.article_permalink_base, 'get_all_articles', 'article_archive_page', 'articles')
 496                         if self.article_permalink_style in 'DMY':
 497                                 urlpatterns += self.feed_patterns(r'^%s/(?P<year>\d{4})' % self.article_permalink_base, 'get_articles_by_ymd', 'article_archive_page', 'articles_by_year')
 498                                 if self.article_permalink_style in 'DM':
 499                                         urlpatterns += self.feed_patterns(r'^%s/(?P<year>\d{4})/(?P<month>\d{2})' % self.article_permalink_base, 'get_articles_by_ymd', 'article_archive_page', 'articles_by_month')
 500                                         if self.article_permalink_style == 'D':
 501                                                 urlpatterns += self.feed_patterns(r'^%s/(?P<year>\d{4})/(?P<month>\d{2})/(?P<day>\d{2})' % self.article_permalink_base, 'get_articles_by_ymd', 'article_archive_page', 'articles_by_day')
 502
 503                 if self.article_permalink_style == 'Y':
 504                         urlpatterns += patterns('',
 505                                 url(r'^%s/(?P<year>\d{4})/(?P<slug>[\w-]+)$' % self.article_permalink_base, self.article_view)
 506                         )
 507                 elif self.article_permalink_style == 'M':
 508                         urlpatterns += patterns('',
 509                                 url(r'^%s/(?P<year>\d{4})/(?P<month>\d{2})/(?P<slug>[\w-]+)$' % self.article_permalink_base, self.article_view)
 510                         )
 511                 elif self.article_permalink_style == 'D':
 512                         urlpatterns += patterns('',
 513                                 url(r'^%s/(?P<year>\d{4})/(?P<month>\d{2})/(?P<day>\d{2})/(?P<slug>[\w-]+)$' % self.article_permalink_base, self.article_view)
 514                         )
 515                 else:
 516                         urlpatterns += patterns('',
 517                                 url(r'^%s/(?P<slug>[-\w]+)$' % self.article_permalink_base, self.article_view)
 518                         )
 519
 520                 return urlpatterns
 521
 522         def get_context(self):
 523                 return {'newsletter': self.newsletter}
 524
 525         def get_article_queryset(self, obj):
 526                 """Returns the default :class:`QuerySet` of :class:`NewsletterArticle` instances for the :class:`NewsletterView` - all articles that are considered posted in the past. This allows for scheduled posting of articles."""
 527                 return obj.articles.filter(date__lte=datetime.now())
 528
 529         def get_issue_queryset(self, obj):
 530                 """Returns the default :class:`QuerySet` of :class:`NewsletterIssue` instances for the :class:`NewsletterView`."""
 531                 return obj.issues.all()
 532
 533         def get_all_articles(self, obj, request, extra_context=None):
 534                 """Used to generate :meth:`~.FeedView.feed_patterns` for all entries."""
 535                 return self.get_article_queryset(obj), extra_context
 536
 537         def get_articles_by_ymd(self, obj, request, year, month=None, day=None, extra_context=None):
 538                 """Used to generate :meth:`~.FeedView.feed_patterns` for a specific year, month, and day."""
 539                 articles = self.get_article_queryset(obj).filter(date__year=year)
 540                 if month:
 541                         articles = articles.filter(date__month=month)
 542                 if day:
 543                         articles = articles.filter(date__day=day)
 544                 return articles, extra_context
 545
 546         def get_articles_by_issue(self, obj, request, numbering, extra_context=None):
 547                 """Used to generate :meth:`~.FeedView.feed_patterns` for articles from a certain issue."""
 548                 try:
 549                         issue = self.get_issue_queryset(obj).get(numbering=numbering)
 550                 except NewsletterIssue.DoesNotExist:
 551                         raise Http404
 552                 context = extra_context or {}
 553                 context.update({'issue': issue})
 554                 return self.get_article_queryset(obj).filter(issues=issue), context
 555
 556         def article_view(self, request, slug, year=None, month=None, day=None, extra_context=None):
 557                 """Renders :attr:`article_page` with the article specified by the given parameters."""
 558                 articles = self.get_article_queryset(self.newsletter)
 559                 if year:
 560                         articles = articles.filter(date__year=year)
 561                 if month:
 562                         articles = articles.filter(date__month=month)
 563                 if day:
 564                         articles = articles.filter(date__day=day)
 565                 try:
 566                         article = articles.get(slug=slug)
 567                 except NewsletterArticle.DoesNotExist:
 568                         raise Http404
 569                 context = self.get_context()
 570                 context.update(extra_context or {})
 571                 context.update({'article': article})
 572                 return self.article_page.render_to_response(request, extra_context=context)
 573
 574         def issue_archive_view(self, request, extra_context):
 575                 """Renders :attr:`issue_archive_page` with the result of :meth:`get_issue_queryset` added to the context."""
 576                 if not self.issue_archive_page:
 577                         raise Http404
 578                 context = self.get_context()
 579                 context.update(extra_context or {})
 580                 context.update({
 581                         'issues': self.get_issue_queryset(self.newsletter)
 582                 })
 583                 return self.issue_archive_page.render_to_response(request, extra_context=context)
 584
 585         def title(self, obj):
 586                 return obj.title
 587
 588         def item_title(self, item):
 589                 return item.title
 590
 591         def item_description(self, item):
 592                 return item.full_text
 593
 594         def item_author_name(self, item):
 595                 authors = list(item.authors.all())
 596                 if len(authors) > 1:
 597                         return "%s and %s" % (", ".join([author.get_full_name() for author in authors[:-1]]), authors[-1].get_full_name())
 598                 elif authors:
 599                         return authors[0].get_full_name()
 600                 else:
 601                         return ''
 602
 603         def item_pubdate(self, item):
 604                 return item.date
 605
 606         def item_categories(self, item):
 607                 return [tag.name for tag in item.tags.all()]