X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/9e41863c3cff14cbbc65b783ee57120fb59fa22c..f230a3850ec568f2281f085a076a6185d8c82b5c:/apps/catalogue/models.py
diff --git a/apps/catalogue/models.py b/apps/catalogue/models.py
index a5b0ebf0c..fbae111ea 100644
--- a/apps/catalogue/models.py
+++ b/apps/catalogue/models.py
@@ -2,7 +2,7 @@
# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
#
-from datetime import datetime
+from collections import namedtuple
from django.db import models
from django.db.models import permalink, Q
@@ -23,13 +23,17 @@ from django.conf import settings
from newtagging.models import TagBase, tags_updated
from newtagging import managers
from catalogue.fields import JSONField, OverwritingFileField
-from catalogue.utils import create_zip
+from catalogue.utils import create_zip, split_tags
+from catalogue.tasks import touch_tag, index_book
from shutil import copy
from glob import glob
import re
from os import path
+import search
+
+# Those are hard-coded here so that makemessages sees them.
TAG_CATEGORIES = (
('author', _('author')),
('epoch', _('epoch')),
@@ -40,13 +44,6 @@ TAG_CATEGORIES = (
('book', _('book')),
)
-MEDIA_FORMATS = (
- ('odt', _('ODT file')),
- ('mp3', _('MP3 file')),
- ('ogg', _('OGG file')),
- ('daisy', _('DAISY file')),
-)
-
# not quite, but Django wants you to set a timeout
CACHE_FOREVER = 2419200 # 28 days
@@ -67,7 +64,6 @@ class Tag(TagBase):
category = models.CharField(_('category'), max_length=50, blank=False, null=False,
db_index=True, choices=TAG_CATEGORIES)
description = models.TextField(_('description'), blank=True)
- main_page = models.BooleanField(_('main page'), default=False, db_index=True, help_text=_('Show tag on main page'))
user = models.ForeignKey(User, blank=True, null=True)
book_count = models.IntegerField(_('book count'), blank=True, null=True)
@@ -112,25 +108,22 @@ class Tag(TagBase):
has_description.boolean = True
def get_count(self):
- """ returns global book count for book tags, fragment count for themes """
-
- if self.book_count is None:
- if self.category == 'book':
- # never used
- objects = Book.objects.none()
- elif self.category == 'theme':
- objects = Fragment.tagged.with_all((self,))
- else:
- objects = Book.tagged.with_all((self,)).order_by()
- if self.category != 'set':
- # eliminate descendants
- l_tags = Tag.objects.filter(slug__in=[book.book_tag_slug() for book in objects])
- descendants_keys = [book.pk for book in Book.tagged.with_any(l_tags)]
- if descendants_keys:
- objects = objects.exclude(pk__in=descendants_keys)
- self.book_count = objects.count()
- self.save()
- return self.book_count
+ """Returns global book count for book tags, fragment count for themes."""
+
+ if self.category == 'book':
+ # never used
+ objects = Book.objects.none()
+ elif self.category == 'theme':
+ objects = Fragment.tagged.with_all((self,))
+ else:
+ objects = Book.tagged.with_all((self,)).order_by()
+ if self.category != 'set':
+ # eliminate descendants
+ l_tags = Tag.objects.filter(slug__in=[book.book_tag_slug() for book in objects])
+ descendants_keys = [book.pk for book in Book.tagged.with_any(l_tags)]
+ if descendants_keys:
+ objects = objects.exclude(pk__in=descendants_keys)
+ return objects.count()
@staticmethod
def get_tag_list(tags):
@@ -174,16 +167,43 @@ class Tag(TagBase):
def url_chunk(self):
return '/'.join((Tag.categories_dict[self.category], self.slug))
+ @staticmethod
+ def tags_from_info(info):
+ from slughifi import slughifi
+ from sortify import sortify
+ meta_tags = []
+ categories = (('kinds', 'kind'), ('genres', 'genre'), ('authors', 'author'), ('epochs', 'epoch'))
+ for field_name, category in categories:
+ try:
+ tag_names = getattr(info, field_name)
+ except:
+ try:
+ tag_names = [getattr(info, category)]
+ except:
+ # For instance, Pictures do not have 'genre' field.
+ continue
+ for tag_name in tag_names:
+ tag_sort_key = tag_name
+ if category == 'author':
+ tag_sort_key = tag_name.last_name
+ tag_name = tag_name.readable()
+ tag, created = Tag.objects.get_or_create(slug=slughifi(tag_name), category=category)
+ if created:
+ tag.name = tag_name
+ tag.sort_key = sortify(tag_sort_key.lower())
+ tag.save()
+ meta_tags.append(tag)
+ return meta_tags
+
+
def get_dynamic_path(media, filename, ext=None, maxlen=100):
from slughifi import slughifi
# how to put related book's slug here?
if not ext:
- if media.type == 'daisy':
- ext = 'daisy.zip'
- else:
- ext = media.type
+ # BookMedia case
+ ext = media.formats[media.type].ext
if media is None or not media.name:
name = slughifi(filename.split(".")[0])
else:
@@ -203,7 +223,7 @@ def get_customized_pdf_path(book, customizations):
customizations.sort()
h = hash(tuple(customizations))
- pdf_name = '%s-custom-%s' % (book.fileid(), h)
+ pdf_name = '%s-custom-%s' % (book.slug, h)
pdf_file = get_dynamic_path(None, pdf_name, ext='pdf')
return pdf_file
@@ -213,14 +233,23 @@ def get_existing_customized_pdf(book):
"""
Returns a list of paths to generated customized pdf of a book
"""
- pdf_glob = '%s-custom-' % (book.fileid(),)
+ pdf_glob = '%s-custom-' % (book.slug,)
pdf_glob = get_dynamic_path(None, pdf_glob, ext='pdf')
pdf_glob = re.sub(r"[.]([a-z0-9]+)$", "*.\\1", pdf_glob)
return glob(path.join(settings.MEDIA_ROOT, pdf_glob))
class BookMedia(models.Model):
- type = models.CharField(_('type'), choices=MEDIA_FORMATS, max_length="100")
+ FileFormat = namedtuple("FileFormat", "name ext")
+ formats = SortedDict([
+ ('mp3', FileFormat(name='MP3', ext='mp3')),
+ ('ogg', FileFormat(name='Ogg Vorbis', ext='ogg')),
+ ('daisy', FileFormat(name='DAISY', ext='daisy.zip')),
+ ])
+ format_choices = [(k, _('%s file') % t.name)
+ for k, t in formats.items()]
+
+ type = models.CharField(_('type'), choices=format_choices, max_length="100")
name = models.CharField(_('name'), max_length="100")
file = OverwritingFileField(_('file'), upload_to=book_upload_path())
uploaded_at = models.DateTimeField(_('creation date'), auto_now_add=True, editable=False)
@@ -243,7 +272,7 @@ class BookMedia(models.Model):
try:
old = BookMedia.objects.get(pk=self.pk)
except BookMedia.DoesNotExist, e:
- pass
+ old = None
else:
# if name changed, change the file name, too
if slughifi(self.name) != slughifi(old.name):
@@ -252,7 +281,9 @@ class BookMedia(models.Model):
super(BookMedia, self).save(*args, **kwargs)
# remove the zip package for book with modified media
- remove_zip(self.book.fileid())
+ if old:
+ remove_zip("%s_%s" % (old.book.slug, old.type))
+ remove_zip("%s_%s" % (self.book.slug, self.type))
extra_info = self.get_extra_info_value()
extra_info.update(self.read_meta())
@@ -321,7 +352,9 @@ class BookMedia(models.Model):
class Book(models.Model):
title = models.CharField(_('title'), max_length=120)
sort_key = models.CharField(_('sort key'), max_length=120, db_index=True, editable=False)
- slug = models.SlugField(_('slug'), max_length=120, db_index=True)
+ slug = models.SlugField(_('slug'), max_length=120, db_index=True,
+ unique=True)
+ common_slug = models.SlugField(_('slug'), max_length=120, db_index=True)
language = models.CharField(_('language code'), max_length=3, db_index=True,
default=settings.CATALOGUE_DEFAULT_LANGUAGE)
description = models.TextField(_('description'), blank=True)
@@ -333,8 +366,11 @@ class Book(models.Model):
wiki_link = models.CharField(blank=True, max_length=240)
# files generated during publication
- file_types = ['epub', 'html', 'mobi', 'pdf', 'txt', 'xml']
-
+ cover = models.FileField(_('cover'), upload_to=book_upload_path('png'),
+ null=True, blank=True)
+ ebook_formats = ['pdf', 'epub', 'mobi', 'txt']
+ formats = ebook_formats + ['html', 'xml']
+
parent = models.ForeignKey('self', blank=True, null=True, related_name='children')
objects = models.Manager()
tagged = managers.ModelTaggedItemManager(Tag)
@@ -343,14 +379,10 @@ class Book(models.Model):
html_built = django.dispatch.Signal()
published = django.dispatch.Signal()
- URLID_RE = r'[a-z0-9-]+(?:/[a-z]{3})?'
- FILEID_RE = r'[a-z0-9-]+(?:_[a-z]{3})?'
-
class AlreadyExists(Exception):
pass
class Meta:
- unique_together = [['slug', 'language']]
ordering = ('sort_key',)
verbose_name = _('book')
verbose_name_plural = _('books')
@@ -358,42 +390,6 @@ class Book(models.Model):
def __unicode__(self):
return self.title
- def urlid(self, sep='/'):
- stem = self.slug
- if self.language != settings.CATALOGUE_DEFAULT_LANGUAGE:
- stem += sep + self.language
- return stem
-
- def fileid(self):
- return self.urlid('_')
-
- @staticmethod
- def split_urlid(urlid, sep='/', default_lang=settings.CATALOGUE_DEFAULT_LANGUAGE):
- """Splits a URL book id into slug and language code.
-
- Returns a dictionary usable i.e. for object lookup, or None.
-
- >>> Book.split_urlid("a-slug/pol", default_lang="eng")
- {'slug': 'a-slug', 'language': 'pol'}
- >>> Book.split_urlid("a-slug", default_lang="eng")
- {'slug': 'a-slug', 'language': 'eng'}
- >>> Book.split_urlid("a-slug_pol", "_", default_lang="eng")
- {'slug': 'a-slug', 'language': 'pol'}
- >>> Book.split_urlid("a-slug/eng", default_lang="eng")
-
- """
- parts = urlid.rsplit(sep, 1)
- if len(parts) == 2:
- if parts[1] == default_lang:
- return None
- return {'slug': parts[0], 'language': parts[1]}
- else:
- return {'slug': urlid, 'language': default_lang}
-
- @classmethod
- def split_fileid(cls, fileid):
- return cls.split_urlid(fileid, '_')
-
def save(self, force_insert=False, force_update=False, reset_short_html=True, **kwargs):
from sortify import sortify
@@ -408,18 +404,14 @@ class Book(models.Model):
@permalink
def get_absolute_url(self):
- return ('catalogue.views.book_detail', [self.urlid()])
+ return ('catalogue.views.book_detail', [self.slug])
@property
def name(self):
return self.title
def book_tag_slug(self):
- stem = 'l-' + self.slug
- if self.language != settings.CATALOGUE_DEFAULT_LANGUAGE:
- return stem[:116] + ' ' + self.language
- else:
- return stem[:120]
+ return ('l-' + self.slug)[:120]
def book_tag(self):
slug = self.book_tag_slug()
@@ -431,14 +423,14 @@ class Book(models.Model):
return book_tag
def has_media(self, type):
- if type in Book.file_types:
+ if type in Book.formats:
return bool(getattr(self, "%s_file" % type))
else:
return self.media.filter(type=type).exists()
def get_media(self, type):
if self.has_media(type):
- if type in Book.file_types:
+ if type in Book.formats:
return getattr(self, "%s_file" % type)
else:
return self.media.filter(type=type)
@@ -461,6 +453,7 @@ class Book(models.Model):
cache_key = "Book.short_html/%d/%s"
for lang, langname in settings.LANGUAGES:
cache.delete(cache_key % (self.id, lang))
+ cache.delete("Book.mini_box/%d" % (self.id, ))
# Fragment.short_html relies on book's tags, so reset it here too
for fragm in self.fragments.all():
fragm.reset_short_html()
@@ -475,26 +468,15 @@ class Book(models.Model):
if short_html is not None:
return mark_safe(short_html)
else:
- tags = self.tags.filter(~Q(category__in=('set', 'theme', 'book')))
- tags = [mark_safe(u'%s' % (tag.get_absolute_url(), tag.name)) for tag in tags]
+ tags = self.tags.filter(category__in=('author', 'kind', 'genre', 'epoch'))
+ tags = split_tags(tags)
- formats = []
+ formats = {}
# files generated during publication
- if self.has_media("html"):
- formats.append(u'%s' % (reverse('book_text', args=[self.fileid()]), _('Read online')))
- if self.has_media("pdf"):
- formats.append(u'PDF' % self.get_media('pdf').url)
- if self.has_media("mobi"):
- formats.append(u'MOBI' % self.get_media('mobi').url)
- if self.root_ancestor.has_media("epub"):
- formats.append(u'EPUB' % self.root_ancestor.get_media('epub').url)
- if self.has_media("txt"):
- formats.append(u'TXT' % self.get_media('txt').url)
- # other files
- for m in self.media.order_by('type'):
- formats.append(u'%s' % (m.file.url, m.type.upper()))
-
- formats = [mark_safe(format) for format in formats]
+ for ebook_format in self.ebook_formats:
+ if self.has_media(ebook_format):
+ formats[ebook_format] = self.get_media(ebook_format)
+
short_html = unicode(render_to_string('catalogue/book_short.html',
{'book': self, 'tags': tags, 'formats': formats}))
@@ -505,7 +487,7 @@ class Book(models.Model):
def mini_box(self):
if self.id:
- cache_key = "Book.mini_boxs/%d" % (self.id, )
+ cache_key = "Book.mini_box/%d" % (self.id, )
short_html = cache.get(cache_key)
else:
short_html = None
@@ -520,29 +502,12 @@ class Book(models.Model):
cache.set(cache_key, short_html, CACHE_FOREVER)
return mark_safe(short_html)
- @property
- def root_ancestor(self):
- """ returns the oldest ancestor """
-
- if not hasattr(self, '_root_ancestor'):
- book = self
- while book.parent:
- book = book.parent
- self._root_ancestor = book
- return self._root_ancestor
-
-
def has_description(self):
return len(self.description) > 0
has_description.short_description = _('description')
has_description.boolean = True
# ugly ugly ugly
- def has_odt_file(self):
- return bool(self.has_media("odt"))
- has_odt_file.short_description = 'ODT'
- has_odt_file.boolean = True
-
def has_mp3_file(self):
return bool(self.has_media("mp3"))
has_mp3_file.short_description = 'MP3'
@@ -559,13 +524,27 @@ class Book(models.Model):
has_daisy_file.boolean = True
def wldocument(self, parse_dublincore=True):
- from catalogue.utils import ORMDocProvider
+ from catalogue.import_utils import ORMDocProvider
from librarian.parser import WLDocument
return WLDocument.from_file(self.xml_file.path,
provider=ORMDocProvider(self),
parse_dublincore=parse_dublincore)
+ def build_cover(self, book_info=None):
+ """(Re)builds the cover image."""
+ from StringIO import StringIO
+ from django.core.files.base import ContentFile
+ from librarian.cover import WLCover
+
+ if book_info is None:
+ book_info = self.wldocument().book_info
+
+ cover = WLCover(book_info).image()
+ imgstr = StringIO()
+ cover.save(imgstr, 'png')
+ self.cover.save(None, ContentFile(imgstr.getvalue()))
+
def build_pdf(self, customizations=None, file_name=None):
""" (Re)builds the pdf file.
customizations - customizations which are passed to LaTeX class file.
@@ -581,7 +560,7 @@ class Book(models.Model):
# we'd like to be sure not to overwrite changes happening while
# (timely) pdf generation is taking place (async celery scenario)
current_self = Book.objects.get(id=self.id)
- current_self.pdf_file.save('%s.pdf' % self.fileid(),
+ current_self.pdf_file.save('%s.pdf' % self.slug,
File(open(pdf.get_filename())))
self.pdf_file = current_self.pdf_file
@@ -604,39 +583,20 @@ class Book(models.Model):
mobi = self.wldocument().as_mobi()
- self.mobi_file.save('%s.mobi' % self.fileid(), File(open(mobi.get_filename())))
+ self.mobi_file.save('%s.mobi' % self.slug, File(open(mobi.get_filename())))
# remove zip with all mobi files
remove_zip(settings.ALL_MOBI_ZIP)
- def build_epub(self, remove_descendants=True):
- """ (Re)builds the epub file.
- If book has a parent, does nothing.
- Unless remove_descendants is False, descendants' epubs are removed.
- """
+ def build_epub(self):
+ """(Re)builds the epub file."""
from django.core.files import File
from catalogue.utils import remove_zip
- if self.parent:
- # don't need an epub
- return
-
epub = self.wldocument().as_epub()
- try:
- epub.transform(ORMDocProvider(self), self.fileid(), output_file=epub_file)
- self.epub_file.save('%s.epub' % self.fileid(), File(open(epub.get_filename())))
- except NoDublinCore:
- pass
-
- book_descendants = list(self.children.all())
- while len(book_descendants) > 0:
- child_book = book_descendants.pop(0)
- if remove_descendants and child_book.has_epub_file():
- child_book.epub_file.delete()
- # save anyway, to refresh short_html
- child_book.save()
- book_descendants += list(child_book.children.all())
+ self.epub_file.save('%s.epub' % self.slug,
+ File(open(epub.get_filename())))
# remove zip package with all epub files
remove_zip(settings.ALL_EPUB_ZIP)
@@ -645,7 +605,7 @@ class Book(models.Model):
from django.core.files.base import ContentFile
text = self.wldocument().as_text()
- self.txt_file.save('%s.txt' % self.fileid(), ContentFile(text.get_string()))
+ self.txt_file.save('%s.txt' % self.slug, ContentFile(text.get_string()))
def build_html(self):
@@ -660,7 +620,7 @@ class Book(models.Model):
html_output = self.wldocument(parse_dublincore=False).as_html()
if html_output:
- self.html_file.save('%s.html' % self.fileid(),
+ self.html_file.save('%s.html' % self.slug,
ContentFile(html_output.get_string()))
# get ancestor l-tags for adding to new fragments
@@ -711,7 +671,7 @@ class Book(models.Model):
def pretty_file_name(book):
return "%s/%s.%s" % (
b.get_extra_info_value()['author'],
- b.fileid(),
+ b.slug,
format_)
field_name = "%s_file" % format_
@@ -722,12 +682,25 @@ class Book(models.Model):
getattr(settings, "ALL_%s_ZIP" % format_.upper()))
return result.wait()
- def zip_audiobooks(self):
- bm = BookMedia.objects.filter(book=self, type='mp3')
+ def zip_audiobooks(self, format_):
+ bm = BookMedia.objects.filter(book=self, type=format_)
paths = map(lambda bm: (None, bm.file.path), bm)
- result = create_zip.delay(paths, self.fileid())
+ result = create_zip.delay(paths, "%s_%s" % (self.slug, format_))
return result.wait()
+ def search_index(self, book_info=None, reuse_index=False):
+ if reuse_index:
+ idx = search.ReusableIndex()
+ else:
+ idx = search.Index()
+
+ idx.open()
+ try:
+ idx.index_book(self, book_info)
+ idx.index_tags()
+ finally:
+ idx.close()
+
@classmethod
def from_xml_file(cls, xml_file, **kwargs):
from django.core.files import File
@@ -746,9 +719,9 @@ class Book(models.Model):
@classmethod
def from_text_and_meta(cls, raw_file, book_info, overwrite=False,
- build_epub=True, build_txt=True, build_pdf=True, build_mobi=True):
+ build_epub=True, build_txt=True, build_pdf=True, build_mobi=True,
+ search_index=True):
import re
- from slughifi import slughifi
from sortify import sortify
# check for parts before we do anything
@@ -756,51 +729,37 @@ class Book(models.Model):
if hasattr(book_info, 'parts'):
for part_url in book_info.parts:
try:
- children.append(Book.objects.get(
- slug=part_url.slug, language=part_url.language))
+ children.append(Book.objects.get(slug=part_url.slug))
except Book.DoesNotExist, e:
- raise Book.DoesNotExist(_('Book "%s/%s" does not exist.') %
- (part_url.slug, part_url.language))
+ raise Book.DoesNotExist(_('Book "%s" does not exist.') %
+ part_url.slug)
# Read book metadata
book_slug = book_info.url.slug
- language = book_info.language
- if re.search(r'[^a-zA-Z0-9-]', book_slug):
+ if re.search(r'[^a-z0-9-]', book_slug):
raise ValueError('Invalid characters in slug')
- book, created = Book.objects.get_or_create(slug=book_slug, language=language)
+ book, created = Book.objects.get_or_create(slug=book_slug)
if created:
book_shelves = []
else:
if not overwrite:
- raise Book.AlreadyExists(_('Book %s/%s already exists') % (
- book_slug, language))
+ raise Book.AlreadyExists(_('Book %s already exists') % (
+ book_slug))
# Save shelves for this book
book_shelves = list(book.tags.filter(category='set'))
+ book.language = book_info.language
book.title = book_info.title
+ if book_info.variant_of:
+ book.common_slug = book_info.variant_of.slug
+ else:
+ book.common_slug = book.slug
book.set_extra_info_value(book_info.to_dict())
book.save()
- meta_tags = []
- categories = (('kinds', 'kind'), ('genres', 'genre'), ('authors', 'author'), ('epochs', 'epoch'))
- for field_name, category in categories:
- try:
- tag_names = getattr(book_info, field_name)
- except:
- tag_names = [getattr(book_info, category)]
- for tag_name in tag_names:
- tag_sort_key = tag_name
- if category == 'author':
- tag_sort_key = tag_name.last_name
- tag_name = ' '.join(tag_name.first_names) + ' ' + tag_name.last_name
- tag, created = Tag.objects.get_or_create(slug=slughifi(tag_name), category=category)
- if created:
- tag.name = tag_name
- tag.sort_key = sortify(tag_sort_key.lower())
- tag.save()
- meta_tags.append(tag)
+ meta_tags = Tag.tags_from_info(book_info)
book.tags = set(meta_tags + book_shelves)
@@ -821,26 +780,35 @@ class Book(models.Model):
if not settings.NO_BUILD_TXT and build_txt:
book.build_txt()
+ book.build_cover(book_info)
+
if not settings.NO_BUILD_EPUB and build_epub:
- book.root_ancestor.build_epub()
+ book.build_epub()
if not settings.NO_BUILD_PDF and build_pdf:
- book.root_ancestor.build_pdf()
+ book.build_pdf()
if not settings.NO_BUILD_MOBI and build_mobi:
book.build_mobi()
+ if not settings.NO_SEARCH_INDEX and search_index:
+ index_book.delay(book.id, book_info)
+
book_descendants = list(book.children.all())
+ descendants_tags = set()
# add l-tag to descendants and their fragments
- # delete unnecessary EPUB files
while len(book_descendants) > 0:
child_book = book_descendants.pop(0)
+ descendants_tags.update(child_book.tags)
child_book.tags = list(child_book.tags) + [book_tag]
child_book.save()
for fragment in child_book.fragments.all():
fragment.tags = set(list(fragment.tags) + [book_tag])
book_descendants += list(child_book.children.all())
+ for tag in descendants_tags:
+ touch_tag.delay(tag)
+
book.save()
# refresh cache
@@ -951,7 +919,7 @@ class Book(models.Model):
books_by_parent = {}
books = cls.objects.all().order_by('parent_number', 'sort_key').only(
- 'title', 'parent', 'slug', 'language')
+ 'title', 'parent', 'slug')
if filter:
books = books.filter(filter).distinct()
book_ids = set((book.pk for book in books))
@@ -1002,7 +970,7 @@ def _has_factory(ftype):
# add the file fields
-for t in Book.file_types:
+for t in Book.formats:
field_name = "%s_file" % t
models.FileField(_("%s file" % t.upper()),
upload_to=book_upload_path(t),
@@ -1027,7 +995,7 @@ class Fragment(models.Model):
verbose_name_plural = _('fragments')
def get_absolute_url(self):
- return '%s#m%s' % (self.book.get_html_url(), self.anchor)
+ return '%s#m%s' % (reverse('book_text', args=[self.book.slug]), self.anchor)
def reset_short_html(self):
if self.id is None:
@@ -1064,7 +1032,8 @@ class Fragment(models.Model):
def _tags_updated_handler(sender, affected_tags, **kwargs):
# reset tag global counter
# we want Tag.changed_at updated for API to know the tag was touched
- Tag.objects.filter(pk__in=[tag.pk for tag in affected_tags]).update(book_count=None, changed_at=datetime.now())
+ for tag in affected_tags:
+ touch_tag.delay(tag)
# if book tags changed, reset book tag counter
if isinstance(sender, Book) and \