# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
#
+from collections import OrderedDict
+from random import randint
import re
from django.conf import settings
-from django.core.cache import get_cache
-from django.db import models
+from django.db import connection, models, transaction
from django.db.models import permalink
import django.dispatch
-from django.utils.datastructures import SortedDict
+from django.contrib.contenttypes.fields import GenericRelation
+from django.core.urlresolvers import reverse
from django.utils.translation import ugettext_lazy as _
import jsonfield
+from fnpdjango.storage import BofhFileSystemStorage
+from ssify import flush_ssi_includes
+from newtagging import managers
+from catalogue import constants
+from catalogue.fields import EbookField
from catalogue.models import Tag, Fragment, BookMedia
-from catalogue.utils import create_zip, split_tags, truncate_html_words, book_upload_path
+from catalogue.utils import create_zip
+from catalogue import app_settings
from catalogue import tasks
-from newtagging import managers
+bofh_storage = BofhFileSystemStorage()
+
+
+def _cover_upload_to(i, n):
+ return 'book/cover/%s.jpg' % i.slug
+
+def _cover_thumb_upload_to(i, n):
+ return 'book/cover_thumb/%s.jpg' % i.slug
-permanent_cache = get_cache('permanent')
+def _ebook_upload_to(upload_path):
+ def _upload_to(i, n):
+ return upload_path % i.slug
+ return _upload_to
class Book(models.Model):
"""Represents a book imported from WL-XML."""
- title = models.CharField(_('title'), max_length=120)
+ title = models.CharField(_('title'), max_length=32767)
sort_key = models.CharField(_('sort key'), max_length=120, db_index=True, editable=False)
+ sort_key_author = models.CharField(_('sort key by author'), max_length=120, db_index=True, editable=False, default=u'')
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)
+ default=app_settings.DEFAULT_LANGUAGE)
description = models.TextField(_('description'), blank=True)
created_at = models.DateTimeField(_('creation date'), auto_now_add=True, db_index=True)
changed_at = models.DateTimeField(_('creation date'), auto_now=True, db_index=True)
parent_number = models.IntegerField(_('parent number'), default=0)
- extra_info = jsonfield.JSONField(_('extra information'), default='{}')
+ extra_info = jsonfield.JSONField(_('extra information'), default={})
gazeta_link = models.CharField(blank=True, max_length=240)
wiki_link = models.CharField(blank=True, max_length=240)
# files generated during publication
- cover = models.FileField(_('cover'), upload_to=book_upload_path('png'),
- null=True, blank=True)
- ebook_formats = ['pdf', 'epub', 'mobi', 'fb2', 'txt']
+ cover = EbookField('cover', _('cover'),
+ null=True, blank=True,
+ upload_to=_cover_upload_to,
+ storage=bofh_storage, max_length=255)
+ # Cleaner version of cover for thumbs
+ cover_thumb = EbookField('cover_thumb', _('cover thumbnail'),
+ null=True, blank=True,
+ upload_to=_cover_thumb_upload_to,
+ max_length=255)
+ ebook_formats = constants.EBOOK_FORMATS
formats = ebook_formats + ['html', 'xml']
- parent = models.ForeignKey('self', blank=True, null=True, related_name='children')
-
- _related_info = jsonfield.JSONField(blank=True, null=True, editable=False)
+ parent = models.ForeignKey('self', blank=True, null=True,
+ related_name='children')
+ ancestor = models.ManyToManyField('self', blank=True, null=True,
+ editable=False, related_name='descendant', symmetrical=False)
objects = models.Manager()
tagged = managers.ModelTaggedItemManager(Tag)
tags = managers.TagDescriptor(Tag)
+ tag_relations = GenericRelation(Tag.intermediary_table_model)
html_built = django.dispatch.Signal()
published = django.dispatch.Signal()
+ short_html_url_name = 'catalogue_book_short'
+
class AlreadyExists(Exception):
pass
def __unicode__(self):
return self.title
- def save(self, force_insert=False, force_update=False, reset_short_html=True, **kwargs):
+ def save(self, force_insert=False, force_update=False, **kwargs):
from sortify import sortify
- self.sort_key = sortify(self.title)
+ self.sort_key = sortify(self.title)[:120]
+ self.title = unicode(self.title) # ???
- ret = super(Book, self).save(force_insert, force_update)
+ try:
+ author = self.tags.filter(category='author')[0].sort_key
+ except IndexError:
+ author = u''
+ self.sort_key_author = author
- if reset_short_html:
- self.reset_short_html()
+ ret = super(Book, self).save(force_insert, force_update, **kwargs)
return ret
def get_absolute_url(self):
return ('catalogue.views.book_detail', [self.slug])
+ @staticmethod
+ @permalink
+ def create_url(slug):
+ return ('catalogue.views.book_detail', [slug])
+
@property
def name(self):
return self.title
- def book_tag_slug(self):
- return ('l-' + self.slug)[:120]
+ def language_code(self):
+ return constants.LANGUAGES_3TO2.get(self.language, self.language)
- def book_tag(self):
- slug = self.book_tag_slug()
- book_tag, created = Tag.objects.get_or_create(slug=slug, category='book')
- if created:
- book_tag.name = self.title[:50]
- book_tag.sort_key = self.title.lower()
- book_tag.save()
- return book_tag
+ def language_name(self):
+ return dict(settings.LANGUAGES).get(self.language_code(), "")
def has_media(self, type_):
if type_ in Book.formats:
if self.has_media(type_):
if type_ in Book.formats:
return getattr(self, "%s_file" % type_)
- else:
+ else:
return self.media.filter(type=type_)
else:
return None
def get_ogg(self):
return self.get_media("ogg")
def get_daisy(self):
- return self.get_media("daisy")
-
- def reset_short_html(self):
- if self.id is None:
- return
-
- type(self).objects.filter(pk=self.pk).update(_related_info=None)
- # Fragment.short_html relies on book's tags, so reset it here too
- for fragm in self.fragments.all().iterator():
- fragm.reset_short_html()
+ return self.get_media("daisy")
def has_description(self):
return len(self.description) > 0
has_daisy_file.short_description = 'DAISY'
has_daisy_file.boolean = True
- def wldocument(self, parse_dublincore=True):
+ def wldocument(self, parse_dublincore=True, inherit=True):
from catalogue.import_utils import ORMDocProvider
from librarian.parser import WLDocument
+ if inherit and self.parent:
+ meta_fallbacks = self.parent.cover_info()
+ else:
+ meta_fallbacks = None
+
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_html(self):
- from django.core.files.base import ContentFile
- from slughifi import slughifi
- from sortify import sortify
- from librarian import html
-
- meta_tags = list(self.tags.filter(
- category__in=('author', 'epoch', 'genre', 'kind')))
- book_tag = self.book_tag()
-
- html_output = self.wldocument(parse_dublincore=False).as_html()
- if html_output:
- self.html_file.save('%s.html' % self.slug,
- ContentFile(html_output.get_string()))
-
- # get ancestor l-tags for adding to new fragments
- ancestor_tags = []
- p = self.parent
- while p:
- ancestor_tags.append(p.book_tag())
- p = p.parent
-
- # Delete old fragments and create them from scratch
- self.fragments.all().delete()
- # Extract fragments
- closed_fragments, open_fragments = html.extract_fragments(self.html_file.path)
- for fragment in closed_fragments.values():
- try:
- theme_names = [s.strip() for s in fragment.themes.split(',')]
- except AttributeError:
- continue
- themes = []
- for theme_name in theme_names:
- if not theme_name:
- continue
- tag, created = Tag.objects.get_or_create(slug=slughifi(theme_name), category='theme')
- if created:
- tag.name = theme_name
- tag.sort_key = sortify(theme_name.lower())
- tag.save()
- themes.append(tag)
- if not themes:
- continue
-
- text = fragment.to_string()
- short_text = truncate_html_words(text, 15)
- if text == short_text:
- short_text = ''
- new_fragment = Fragment.objects.create(anchor=fragment.id, book=self,
- text=text, short_text=short_text)
-
- new_fragment.save()
- new_fragment.tags = set(meta_tags + themes + [book_tag] + ancestor_tags)
- self.save()
- self.html_built.send(sender=self)
- return True
- return False
-
- # Thin wrappers for builder tasks
- def build_pdf(self, *args, **kwargs):
- """(Re)builds PDF."""
- return tasks.build_pdf.delay(self.pk, *args, **kwargs)
- def build_epub(self, *args, **kwargs):
- """(Re)builds EPUB."""
- return tasks.build_epub.delay(self.pk, *args, **kwargs)
- def build_mobi(self, *args, **kwargs):
- """(Re)builds MOBI."""
- return tasks.build_mobi.delay(self.pk, *args, **kwargs)
- def build_fb2(self, *args, **kwargs):
- """(Re)build FB2"""
- return tasks.build_fb2.delay(self.pk, *args, **kwargs)
- def build_txt(self, *args, **kwargs):
- """(Re)builds TXT."""
- return tasks.build_txt.delay(self.pk, *args, **kwargs)
+ parse_dublincore=parse_dublincore,
+ meta_fallbacks=meta_fallbacks)
@staticmethod
def zip_format(format_):
def pretty_file_name(book):
return "%s/%s.%s" % (
- b.extra_info['author'],
- b.slug,
+ book.extra_info['author'],
+ book.slug,
format_)
field_name = "%s_file" % format_
books = Book.objects.filter(parent=None).exclude(**{field_name: ""})
paths = [(pretty_file_name(b), getattr(b, field_name).path)
for b in books.iterator()]
- return create_zip(paths,
- getattr(settings, "ALL_%s_ZIP" % format_.upper()))
+ return create_zip(paths, app_settings.FORMAT_ZIPS[format_])
def zip_audiobooks(self, format_):
bm = BookMedia.objects.filter(book=self, type=format_)
paths = map(lambda bm: (None, bm.file.path), bm)
return create_zip(paths, "%s_%s" % (self.slug, format_))
- def search_index(self, book_info=None, reuse_index=False, index_tags=True):
- import search
- if reuse_index:
- idx = search.ReusableIndex()
- else:
- idx = search.Index()
-
- idx.open()
+ def search_index(self, book_info=None, index=None, index_tags=True, commit=True):
+ if index is None:
+ from search.index import Index
+ index = Index()
try:
- idx.index_book(self, book_info)
+ index.index_book(self, book_info)
if index_tags:
- idx.index_tags()
- finally:
- idx.close()
+ index.index_tags()
+ if commit:
+ index.index.commit()
+ except Exception, e:
+ index.index.rollback()
+ raise e
+
@classmethod
def from_xml_file(cls, xml_file, **kwargs):
@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_fb2=True,
- search_index=True, search_index_tags=True, search_index_reuse=False):
+ dont_build=None, search_index=True,
+ search_index_tags=True):
+ if dont_build is None:
+ dont_build = set()
+ dont_build = set.union(set(dont_build), set(app_settings.DONT_BUILD))
# check for parts before we do anything
children = []
raise Book.DoesNotExist(_('Book "%s" does not exist.') %
part_url.slug)
-
# Read book metadata
book_slug = book_info.url.slug
if re.search(r'[^a-z0-9-]', book_slug):
if created:
book_shelves = []
+ old_cover = None
else:
if not overwrite:
raise Book.AlreadyExists(_('Book %s already exists') % (
book_slug))
# Save shelves for this book
book_shelves = list(book.tags.filter(category='set'))
+ old_cover = book.cover_info()
+
+ # Save XML file
+ book.xml_file.save('%s.xml' % book.slug, raw_file, save=False)
book.language = book_info.language
book.title = book_info.title
book.tags = set(meta_tags + book_shelves)
- book_tag = book.book_tag()
-
+ cover_changed = old_cover != book.cover_info()
+ obsolete_children = set(b for b in book.children.all()
+ if b not in children)
+ notify_cover_changed = []
for n, child_book in enumerate(children):
+ new_child = child_book.parent != book
child_book.parent = book
child_book.parent_number = n
child_book.save()
-
- # Save XML and HTML files
- book.xml_file.save('%s.xml' % book.slug, raw_file, save=False)
- book.build_cover(book_info)
-
- # delete old fragments when overwriting
- book.fragments.all().delete()
-
- if book.build_html():
- # No direct saves behind this point.
- if not settings.NO_BUILD_TXT and build_txt:
- book.build_txt()
-
- if not settings.NO_BUILD_EPUB and build_epub:
- book.build_epub()
-
- if not settings.NO_BUILD_PDF and build_pdf:
- book.build_pdf()
-
- if not settings.NO_BUILD_MOBI and build_mobi:
- book.build_mobi()
-
- if not settings.NO_BUILD_FB2 and build_fb2:
- book.build_fb2()
+ if new_child or cover_changed:
+ notify_cover_changed.append(child_book)
+ # Disown unfaithful children and let them cope on their own.
+ for child in obsolete_children:
+ child.parent = None
+ child.parent_number = 0
+ child.save()
+ if old_cover:
+ notify_cover_changed.append(child)
+
+ cls.repopulate_ancestors()
+
+ # No saves beyond this point.
+
+ # Build cover.
+ if 'cover' not in dont_build:
+ book.cover.build_delay()
+ book.cover_thumb.build_delay()
+
+ # Build HTML and ebooks.
+ book.html_file.build_delay()
+ if not children:
+ for format_ in constants.EBOOK_FORMATS_WITHOUT_CHILDREN:
+ if format_ not in dont_build:
+ getattr(book, '%s_file' % format_).build_delay()
+ for format_ in constants.EBOOK_FORMATS_WITH_CHILDREN:
+ if format_ not in dont_build:
+ getattr(book, '%s_file' % format_).build_delay()
if not settings.NO_SEARCH_INDEX and search_index:
- book.search_index(index_tags=search_index_tags, reuse_index=search_index_reuse)
- #index_book.delay(book.id, book_info)
-
- book_descendants = list(book.children.all())
- descendants_tags = set()
- # add l-tag to descendants and their fragments
- 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().iterator():
- fragment.tags = set(list(fragment.tags) + [book_tag])
- book_descendants += list(child_book.children.all())
+ tasks.index_book.delay(book.id, book_info=book_info, index_tags=search_index_tags)
- for tag in descendants_tags:
- tasks.touch_tag(tag)
+ for child in notify_cover_changed:
+ child.parent_cover_changed()
- # refresh cache
- book.reset_tag_counter()
- book.reset_theme_counter()
-
- cls.published.send(sender=book)
+ cls.published.send(sender=cls, instance=book)
return book
- def related_info(self):
- """Keeps info about related objects (tags, media) in cache field."""
- if self._related_info is not None:
- return self._related_info
- else:
- rel = {'tags': {}, 'media': {}}
-
- tags = self.tags.filter(category__in=(
- 'author', 'kind', 'genre', 'epoch'))
- tags = split_tags(tags)
- for category in tags:
- rel['tags'][category] = [
- (t.name, t.slug) for t in tags[category]]
-
- for media_format in BookMedia.formats:
- rel['media'][media_format] = self.has_media(media_format)
-
- book = self
- parents = []
- while book.parent:
- parents.append((book.parent.title, book.parent.slug))
- book = book.parent
- parents = parents[::-1]
- if parents:
- rel['parents'] = parents
-
- if self.pk:
- type(self).objects.filter(pk=self.pk).update(_related_info=rel)
- return rel
-
- def related_themes(self):
- theme_counter = self.theme_counter
- book_themes = list(Tag.objects.filter(pk__in=theme_counter.keys()))
- for tag in book_themes:
- tag.count = theme_counter[tag.pk]
- return book_themes
-
- def reset_tag_counter(self):
- if self.id is None:
- return
-
- cache_key = "Book.tag_counter/%d" % self.id
- permanent_cache.delete(cache_key)
- if self.parent:
- self.parent.reset_tag_counter()
-
- @property
- def tag_counter(self):
- if self.id:
- cache_key = "Book.tag_counter/%d" % self.id
- tags = permanent_cache.get(cache_key)
- else:
- tags = None
-
- if tags is None:
- tags = {}
- for child in self.children.all().order_by().iterator():
- for tag_pk, value in child.tag_counter.iteritems():
- tags[tag_pk] = tags.get(tag_pk, 0) + value
- for tag in self.tags.exclude(category__in=('book', 'theme', 'set')).order_by().iterator():
- tags[tag.pk] = 1
-
- if self.id:
- permanent_cache.set(cache_key, tags)
- return tags
-
- def reset_theme_counter(self):
- if self.id is None:
+ @classmethod
+ def repopulate_ancestors(cls):
+ """Fixes the ancestry cache."""
+ # TODO: table names
+ with transaction.atomic():
+ cursor = connection.cursor()
+ if connection.vendor == 'postgres':
+ cursor.execute("TRUNCATE catalogue_book_ancestor")
+ cursor.execute("""
+ WITH RECURSIVE ancestry AS (
+ SELECT book.id, book.parent_id
+ FROM catalogue_book AS book
+ WHERE book.parent_id IS NOT NULL
+ UNION
+ SELECT ancestor.id, book.parent_id
+ FROM ancestry AS ancestor, catalogue_book AS book
+ WHERE ancestor.parent_id = book.id
+ AND book.parent_id IS NOT NULL
+ )
+ INSERT INTO catalogue_book_ancestor
+ (from_book_id, to_book_id)
+ SELECT id, parent_id
+ FROM ancestry
+ ORDER BY id;
+ """)
+ else:
+ cursor.execute("DELETE FROM catalogue_book_ancestor")
+ for b in cls.objects.exclude(parent=None):
+ parent = b.parent
+ while parent is not None:
+ b.ancestor.add(parent)
+ parent = parent.parent
+
+ def flush_includes(self, languages=True):
+ if not languages:
return
+ if languages is True:
+ languages = [lc for (lc, _ln) in settings.LANGUAGES]
+ flush_ssi_includes([
+ template % (self.pk, lang)
+ for template in [
+ '/katalog/b/%d/mini.%s.html',
+ '/katalog/b/%d/mini_nolink.%s.html',
+ '/katalog/b/%d/short.%s.html',
+ '/katalog/b/%d/wide.%s.html',
+ '/api/include/book/%d.%s.json',
+ '/api/include/book/%d.%s.xml',
+ ]
+ for lang in languages
+ ])
+
+ def cover_info(self, inherit=True):
+ """Returns a dictionary to serve as fallback for BookInfo.
+
+ For now, the only thing inherited is the cover image.
+ """
+ need = False
+ info = {}
+ for field in ('cover_url', 'cover_by', 'cover_source'):
+ val = self.extra_info.get(field)
+ if val:
+ info[field] = val
+ else:
+ need = True
+ if inherit and need and self.parent is not None:
+ parent_info = self.parent.cover_info()
+ parent_info.update(info)
+ info = parent_info
+ return info
- cache_key = "Book.theme_counter/%d" % self.id
- permanent_cache.delete(cache_key)
- if self.parent:
- self.parent.reset_theme_counter()
-
- @property
- def theme_counter(self):
- if self.id:
- cache_key = "Book.theme_counter/%d" % self.id
- tags = permanent_cache.get(cache_key)
- else:
- tags = None
-
- if tags is None:
- tags = {}
- for fragment in Fragment.tagged.with_any([self.book_tag()]).order_by().iterator():
- for tag in fragment.tags.filter(category='theme').order_by().iterator():
- tags[tag.pk] = tags.get(tag.pk, 0) + 1
-
- if self.id:
- permanent_cache.set(cache_key, tags)
- return tags
+ def related_themes(self):
+ return Tag.objects.usage_for_queryset(
+ Fragment.objects.filter(models.Q(book=self) | models.Q(book__ancestor=self)),
+ counts=True).filter(category='theme')
+
+ def parent_cover_changed(self):
+ """Called when parent book's cover image is changed."""
+ if not self.cover_info(inherit=False):
+ if 'cover' not in app_settings.DONT_BUILD:
+ self.cover.build_delay()
+ self.cover_thumb.build_delay()
+ for format_ in constants.EBOOK_FORMATS_WITH_COVERS:
+ if format_ not in app_settings.DONT_BUILD:
+ getattr(self, '%s_file' % format_).build_delay()
+ for child in self.children.all():
+ child.parent_cover_changed()
+
+ def other_versions(self):
+ """Find other versions (i.e. in other languages) of the book."""
+ return type(self).objects.filter(common_slug=self.common_slug).exclude(pk=self.pk)
+
+ def parents(self):
+ books = []
+ parent = self.parent
+ while parent is not None:
+ books.insert(0, parent)
+ parent = parent.parent
+ return books
def pretty_title(self, html_links=False):
- book = self
- names = list(book.tags.filter(category='author'))
-
- books = []
- while book:
- books.append(book)
- book = book.parent
- names.extend(reversed(books))
+ names = [(tag.name, tag.get_absolute_url())
+ for tag in self.tags.filter(category='author')]
+ books = self.parents() + [self]
+ names.extend([(b.title, b.get_absolute_url()) for b in books])
if html_links:
- names = ['<a href="%s">%s</a>' % (tag.get_absolute_url(), tag.name) for tag in names]
+ names = ['<a href="%s">%s</a>' % (tag[1], tag[0]) for tag in names]
else:
- names = [tag.name for tag in names]
-
+ names = [tag[0] for tag in names]
return ', '.join(names)
@classmethod
also tagged with those tags.
"""
- # get relevant books and their tags
objects = cls.tagged.with_all(tags)
- # eliminate descendants
- l_tags = Tag.objects.filter(category='book',
- slug__in=[book.book_tag_slug() for book in objects.iterator()])
- descendants_keys = [book.pk for book in cls.tagged.with_any(l_tags).iterator()]
- if descendants_keys:
- objects = objects.exclude(pk__in=descendants_keys)
-
- return objects
+ return objects.exclude(ancestor__in=objects)
@classmethod
def book_list(cls, filter=None):
'title', 'parent', 'slug')
if filter:
books = books.filter(filter).distinct()
-
+
book_ids = set(b['pk'] for b in books.values("pk").iterator())
for book in books.iterator():
parent = book.parent_id
books_by_parent.setdefault(book.parent_id, []).append(book)
orphans = []
- books_by_author = SortedDict()
+ books_by_author = OrderedDict()
for tag in Tag.objects.filter(category='author').iterator():
books_by_author[tag] = []
- for book in books_by_parent.get(None,()):
+ for book in books_by_parent.get(None, ()):
authors = list(book.tags.filter(category='author'))
if authors:
for author in authors:
return books_by_author, orphans, books_by_parent
_audiences_pl = {
+ "SP": (1, u"szkoła podstawowa"),
"SP1": (1, u"szkoła podstawowa"),
"SP2": (1, u"szkoła podstawowa"),
"P": (1, u"szkoła podstawowa"),
}
def audiences_pl(self):
audiences = self.extra_info.get('audiences', [])
- audiences = sorted(set([self._audiences_pl[a] for a in audiences]))
+ audiences = sorted(set([self._audiences_pl.get(a, (99, a)) for a in audiences]))
return [a[1] for a in audiences]
+ def stage_note(self):
+ stage = self.extra_info.get('stage')
+ if stage and stage < '0.4':
+ return (_('This work needs modernisation'),
+ reverse('infopage', args=['wymagajace-uwspolczesnienia']))
+ else:
+ return None, None
+
def choose_fragment(self):
- tag = self.book_tag()
- fragments = Fragment.tagged.with_any([tag])
- if fragments.exists():
- return fragments.order_by('?')[0]
+ fragments = self.fragments.order_by()
+ fragments_count = fragments.count()
+ if not fragments_count and self.children.exists():
+ fragments = Fragment.objects.filter(book__ancestor=self).order_by()
+ fragments_count = fragments.count()
+ if fragments_count:
+ return fragments[randint(0, fragments_count - 1)]
elif self.parent:
return self.parent.choose_fragment()
else:
return None
-def _has_factory(ftype):
- has = lambda self: bool(getattr(self, "%s_file" % ftype))
- has.short_description = ftype.upper()
- has.__doc__ = None
- has.boolean = True
- has.__name__ = "has_%s_file" % ftype
- return has
-
-
# add the file fields
-for t in Book.formats:
- field_name = "%s_file" % t
- models.FileField(_("%s file" % t.upper()),
- upload_to=book_upload_path(t),
- blank=True).contribute_to_class(Book, field_name)
-
- setattr(Book, "has_%s_file" % t, _has_factory(t))
+for format_ in Book.formats:
+ field_name = "%s_file" % format_
+ # This weird globals() assignment makes Django migrations comfortable.
+ _upload_to = _ebook_upload_to('book/%s/%%s.%s' % (format_, format_))
+ _upload_to.__name__ = '_%s_upload_to' % format_
+ globals()[_upload_to.__name__] = _upload_to
+
+ EbookField(format_, _("%s file" % format_.upper()),
+ upload_to=_upload_to,
+ storage=bofh_storage,
+ max_length=255,
+ blank=True,
+ default=''
+ ).contribute_to_class(Book, field_name)
fnp / wolnelektury.git / blobdiff