def hidden(self):
"""returns all hidden blog posts"""
if o_settings.CACHE_ENABLED:
key = get_key('posts_hidden')
cached = cache.get(key)
if cached:
return cached
posts = super(PostManager, self).get_query_set().filter(
status=self.model.HIDDEN)
if o_settings.CACHE_ENABLED:
cache.set(key, posts, o_settings.CACHE_TIMEOUT)
return posts
def published(self):
"""returns all published blog post"""
if o_settings.CACHE_ENABLED:
key = get_key('posts_published')
cached = cache.get(key)
if cached:
return cached
posts = super(PostManager, self).get_query_set().filter(
status=self.model.PUBLISHED)
if o_settings.CACHE_ENABLED:
cache.set(key, posts, o_settings.CACHE_TIMEOUT)
return posts
def tags_and_counts(self):
"""returns tags with count of how many posts are tagged with it"""
if o_settings.CACHE_ENABLED:
key = get_key('tags_and_counts')
cached = cache.get(key)
if cached:
return cached
tags = []
tag_models = super(TagManager, self).get_query_set().all()
for tag in tag_models:
tags.append((tag,tag.post_set.filter(status=3).count()))
tags = sorted(tags, key=operator.itemgetter(1), reverse=True)
if o_settings.CACHE_ENABLED:
cache.set(key, tags, o_settings.CACHE_TIMEOUT)
return tags
def _cache_page(request, *args, **kwargs):
if o_settings.CACHE_ENABLED is False:
return fn(request, *args, **kwargs)
if request.user.is_authenticated():
return fn(request, *args, **kwargs)
signature = '%s_%s' % (fn.__name__, '_'.join(kwargs.values()))
key = get_key(signature)
if 'clearcache' not in request.GET.keys():
cached = cache.get(key)
if cached:
return cached
response = fn(request, *args, **kwargs)
cache.set(key, response, o_settings.CACHE_TIMEOUT)
return response
def dates(self):
"""returns the years and months for which there are posts"""
if o_settings.CACHE_ENABLED:
key = get_key('posts_dates')
cached = cache.get(key)
if cached:
return cached
posts = self.published()
dates = OrderedDict()
for post in posts:
key = post.created.strftime('%Y_%m')
try:
dates[key][1] = dates[key][1] + 1
except KeyError:
dates[key] = [post.created, 1]
if o_settings.CACHE_ENABLED:
cache.set(key, dates, o_settings.CACHE_TIMEOUT)
return dates
def clear_cached_posts(sender, instance, **kwargs):
"""when a model is saved clear the cache on the query
and the cache on it's rendered page
- archive_dates
- posts_published
- posts_idea
- posts_draft
- posts_hidden
- tags_and_counts
- view post
- archive month
- all tags for post
"""
try:
saved_instance = sender.objects.get(pk=instance.pk)
except sender.DoesNotExist:
saved_instance = None
#
# TODO: only kill the cache if items have changed .
# e.g if the description, title, slug has changed nuke the
# index
# archive
#
kill_list = []
# dates
if getattr(saved_instance, 'created', None) != instance.created:
kill_list.append(get_key('archive_dates'))
kill_list.append(
get_key('month_%s_%s' % (
instance.created.year,
instance.created.month)))
try:
kill_list.append(
get_key('month_%s_%s' % (
saved_instance.created.year,
saved_instance.created.month)))
except AttributeError:
pass
# Just nuke all of the below for now
kill_list.append(get_key('posts_published'))
kill_list.append(get_key('posts_idea'))
kill_list.append(get_key('posts_draft'))
kill_list.append(get_key('posts_hidden'))
kill_list.append(get_key('tags_and_counts'))
kill_list.append(get_key('index_'))
# always nuke the post
kill_list.append(get_key('post_%s' % instance.slug))
# nuke tags
try:
for tag in instance.tags.all():
kill_list.append(get_key('tag_%s' % tag))
except ValueError:
pass
cache.delete_many(kill_list)
