X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/f3e8dfa015744bd72796fdd8eff0d81f863cdc46..3596cf9db6eabb5f0aa36afe7919bc40e8ff0b9a:/src/catalogue/models/book.py diff --git a/src/catalogue/models/book.py b/src/catalogue/models/book.py index a703c2a1e..bcbefeaa1 100644 --- a/src/catalogue/models/book.py +++ b/src/catalogue/models/book.py @@ -2,71 +2,52 @@ # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information. # from collections import OrderedDict +import json from datetime import date, timedelta from random import randint import os.path import re -import urllib +from urllib.request import urlretrieve +from django.apps import apps from django.conf import settings from django.db import connection, models, transaction import django.dispatch from django.contrib.contenttypes.fields import GenericRelation +from django.template.loader import render_to_string from django.urls import reverse -from django.utils.translation import ugettext_lazy as _, get_language -from django.utils.deconstruct import deconstructible -import jsonfield +from django.utils.translation import gettext_lazy as _, get_language from fnpdjango.storage import BofhFileSystemStorage -from ssify import flush_ssi_includes - +from lxml import html from librarian.cover import WLCover from librarian.html import transform_abstrakt from newtagging import managers from catalogue import constants -from catalogue.fields import EbookField +from catalogue import fields from catalogue.models import Tag, Fragment, BookMedia from catalogue.utils import create_zip, gallery_url, gallery_path, split_tags, get_random_hash from catalogue.models.tag import prefetched_relations from catalogue import app_settings -from catalogue import tasks from wolnelektury.utils import makedirs, cached_render, clear_cached_renders bofh_storage = BofhFileSystemStorage() -@deconstructible -class UploadToPath(object): - def __init__(self, path): - self.path = path - - def __call__(self, instance, filename): - return self.path % instance.slug - - -_cover_upload_to = UploadToPath('book/cover/%s.jpg') -_cover_thumb_upload_to = UploadToPath('book/cover_thumb/%s.jpg') -_cover_api_thumb_upload_to = UploadToPath('book/cover_api_thumb/%s.jpg') -_simple_cover_upload_to = UploadToPath('book/cover_simple/%s.jpg') - - -def _ebook_upload_to(upload_path): - return UploadToPath(upload_path) - - class Book(models.Model): """Represents a book imported from WL-XML.""" 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'') + _('sort key by author'), max_length=120, db_index=True, editable=False, default='') 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=app_settings.DEFAULT_LANGUAGE) description = models.TextField(_('description'), blank=True) abstract = models.TextField(_('abstract'), blank=True) + toc = models.TextField(_('toc'), blank=True) created_at = models.DateTimeField(_('creation date'), auto_now_add=True, db_index=True) changed_at = models.DateTimeField(_('change date'), auto_now=True, db_index=True) parent_number = models.IntegerField(_('parent number'), default=0) - extra_info = jsonfield.JSONField(_('extra information'), default={}) + extra_info = models.TextField(_('extra information'), default='{}') gazeta_link = models.CharField(blank=True, max_length=240) wiki_link = models.CharField(blank=True, max_length=240) print_on_demand = models.BooleanField(_('print on demand'), default=False) @@ -75,29 +56,27 @@ class Book(models.Model): preview = models.BooleanField(_('preview'), default=False) preview_until = models.DateField(_('preview until'), blank=True, null=True) preview_key = models.CharField(max_length=32, blank=True, null=True) + findable = models.BooleanField(_('findable'), default=True, db_index=True) # files generated during publication - cover = EbookField( - 'cover', _('cover'), - null=True, blank=True, - upload_to=_cover_upload_to, - storage=bofh_storage, max_length=255) + xml_file = fields.XmlField(storage=bofh_storage, with_etag=False) + html_file = fields.HtmlField(storage=bofh_storage) + fb2_file = fields.Fb2Field(storage=bofh_storage) + txt_file = fields.TxtField(storage=bofh_storage) + epub_file = fields.EpubField(storage=bofh_storage) + mobi_file = fields.MobiField(storage=bofh_storage) + pdf_file = fields.PdfField(storage=bofh_storage) + + cover = fields.CoverField(_('cover'), storage=bofh_storage) # 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) - cover_api_thumb = EbookField( - 'cover_api_thumb', _('cover thumbnail for mobile app'), - null=True, blank=True, - upload_to=_cover_api_thumb_upload_to, - max_length=255) - simple_cover = EbookField( - 'simple_cover', _('cover for mobile app'), - null=True, blank=True, - upload_to=_simple_cover_upload_to, - max_length=255) + cover_clean = fields.CoverCleanField(_('clean cover')) + cover_thumb = fields.CoverThumbField(_('cover thumbnail')) + cover_api_thumb = fields.CoverApiThumbField( + _('cover thumbnail for mobile app')) + simple_cover = fields.SimpleCoverField(_('cover for mobile app')) + cover_ebookpoint = fields.CoverEbookpointField( + _('cover for Ebookpoint')) + ebook_formats = constants.EBOOK_FORMATS formats = ebook_formats + ['html', 'xml'] @@ -117,6 +96,8 @@ class Book(models.Model): SORT_KEY_SEP = '$' + is_book = True + class AlreadyExists(Exception): pass @@ -129,6 +110,9 @@ class Book(models.Model): def __str__(self): return self.title + def get_extra_info_json(self): + return json.loads(self.extra_info or '{}') + def get_initial(self): try: return re.search(r'\w', self.title, re.U).group(0) @@ -169,8 +153,14 @@ class Book(models.Model): def genre_unicode(self): return self.tag_unicode('genre') + def translators(self): + translators = self.get_extra_info_json().get('translators') or [] + return [ + '\xa0'.join(reversed(translator.split(', ', 1))) for translator in translators + ] + def translator(self): - translators = self.extra_info.get('translators') + translators = self.get_extra_info_json().get('translators') if not translators: return None if len(translators) > 3: @@ -178,10 +168,35 @@ class Book(models.Model): others = ' i inni' else: others = '' - return ', '.join(u'\xa0'.join(reversed(translator.split(', ', 1))) for translator in translators) + others + return ', '.join('\xa0'.join(reversed(translator.split(', ', 1))) for translator in translators) + others def cover_source(self): - return self.extra_info.get('cover_source', self.parent.cover_source() if self.parent else '') + return self.get_extra_info_json().get('cover_source', self.parent.cover_source() if self.parent else '') + + @property + def isbn_pdf(self): + return self.get_extra_info_json().get('isbn_pdf') + + @property + def isbn_epub(self): + return self.get_extra_info_json().get('isbn_epub') + + @property + def isbn_mobi(self): + return self.get_extra_info_json().get('isbn_mobi') + + def is_accessible_to(self, user): + if not self.preview: + return True + if not user.is_authenticated: + return False + Membership = apps.get_model('club', 'Membership') + if Membership.is_active_for(user): + return True + Funding = apps.get_model('funding', 'Funding') + if Funding.objects.filter(user=user, offer__book=self): + return True + return False def save(self, force_insert=False, force_update=False, **kwargs): from sortify import sortify @@ -192,11 +207,11 @@ class Book(models.Model): try: author = self.authors().first().sort_key except AttributeError: - author = u'' + author = '' self.sort_key_author = author self.cached_author = self.tag_unicode('author') - self.has_audience = 'audience' in self.extra_info + self.has_audience = 'audience' in self.get_extra_info_json() if self.preview and not self.preview_key: self.preview_key = get_random_hash(self.slug)[:32] @@ -214,6 +229,64 @@ class Book(models.Model): def gallery_url(self): return gallery_url(self.slug) + def get_first_text(self): + if self.html_file: + return self + child = self.children.all().order_by('parent_number').first() + if child is not None: + return child.get_first_text() + + def get_last_text(self): + if self.html_file: + return self + child = self.children.all().order_by('parent_number').last() + if child is not None: + return child.get_last_text() + + def get_prev_text(self): + if not self.parent: + return None + sibling = self.parent.children.filter(parent_number__lt=self.parent_number).order_by('-parent_number').first() + if sibling is not None: + return sibling.get_last_text() + + if self.parent.html_file: + return self.parent + + return self.parent.get_prev_text() + + def get_next_text(self, inside=True): + if inside: + child = self.children.order_by('parent_number').first() + if child is not None: + return child.get_first_text() + + if not self.parent: + return None + sibling = self.parent.children.filter(parent_number__gt=self.parent_number).order_by('parent_number').first() + if sibling is not None: + return sibling.get_first_text() + return self.parent.get_next_text(inside=False) + + def get_child_audiobook(self): + BookMedia = apps.get_model('catalogue', 'BookMedia') + if not BookMedia.objects.filter(book__ancestor=self).exists(): + return None + for child in self.children.order_by('parent_number').all(): + if child.has_mp3_file(): + return child + child_sub = child.get_child_audiobook() + if child_sub is not None: + return child_sub + + def get_siblings(self): + if not self.parent: + return [] + return self.parent.children.all().order_by('parent_number') + + def get_children(self): + return self.children.all().order_by('parent_number') + @property def name(self): return self.title @@ -235,6 +308,12 @@ class Book(models.Model): @staticmethod def format_audio_length(seconds): + """ + >>> Book.format_audio_length(1) + '0:01' + >>> Book.format_audio_length(3661) + '1:01:01' + """ if seconds < 60*60: minutes = seconds // 60 seconds = seconds % 60 @@ -281,6 +360,9 @@ class Book(models.Model): def get_daisy(self): return self.get_media("daisy") + def get_audio_epub(self): + return self.get_media("audio.epub") + def media_url(self, format_): media = self.get_media(format_) if media: @@ -332,6 +414,32 @@ class Book(models.Model): has_daisy_file.short_description = 'DAISY' has_daisy_file.boolean = True + def has_sync_file(self): + return self.has_media("sync") + + def get_sync(self): + with self.get_media('sync').first().file.open('r') as f: + sync = f.read().split('\n') + offset = float(sync[0]) + items = [] + for line in sync[1:]: + if not line: + continue + start, end, elid = line.split() + items.append([elid, float(start) + offset]) + return json.dumps(items) + + def has_audio_epub_file(self): + return self.has_media("audio.epub") + + @property + def media_daisy(self): + return self.get_media('daisy') + + @property + def media_audio_epub(self): + return self.get_media('audio.epub') + def get_audiobooks(self): ogg_files = {} for m in self.media.filter(type='ogg').order_by().iterator(): @@ -339,15 +447,17 @@ class Book(models.Model): audiobooks = [] projects = set() + total_duration = 0 for mp3 in self.media.filter(type='mp3').iterator(): # ogg files are always from the same project - meta = mp3.extra_info + meta = mp3.get_extra_info_json() project = meta.get('project') if not project: # temporary fallback - project = u'CzytamySłuchając' + project = 'CzytamySłuchając' projects.add((project, meta.get('funded_by', ''))) + total_duration += mp3.duration or 0 media = {'mp3': mp3} @@ -357,7 +467,11 @@ class Book(models.Model): audiobooks.append(media) projects = sorted(projects) - return audiobooks, projects + total_duration = '%d:%02d' % ( + total_duration // 60, + total_duration % 60 + ) + return audiobooks, projects, total_duration def wldocument(self, parse_dublincore=True, inherit=True): from catalogue.import_utils import ORMDocProvider @@ -374,40 +488,56 @@ class Book(models.Model): parse_dublincore=parse_dublincore, meta_fallbacks=meta_fallbacks) + def wldocument2(self): + from catalogue.import_utils import ORMDocProvider + from librarian.document import WLDocument + doc = WLDocument( + self.xml_file.path, + provider=ORMDocProvider(self) + ) + doc.meta.update(self.cover_info()) + return doc + + @staticmethod def zip_format(format_): def pretty_file_name(book): return "%s/%s.%s" % ( - book.extra_info['author'], + book.get_extra_info_json()['author'], book.slug, format_) field_name = "%s_file" % format_ - books = Book.objects.filter(parent=None).exclude(**{field_name: ""}).exclude(preview=True) + field = getattr(Book, field_name) + books = Book.objects.filter(parent=None).exclude(**{field_name: ""}).exclude(preview=True).exclude(findable=False) paths = [(pretty_file_name(b), getattr(b, field_name).path) for b in books.iterator()] - return create_zip(paths, app_settings.FORMAT_ZIPS[format_]) + return create_zip(paths, field.ZIP) 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, index=None, index_tags=True, commit=True): - if index is None: - from search.index import Index - index = Index() - try: - index.index_book(self, book_info) - if index_tags: - index.index_tags() - if commit: - index.index.commit() - except Exception as e: - index.index.rollback() - raise e + paths = map(lambda bm: (bm.get_nice_filename(), bm.file.path), bm) + licenses = set() + for m in bm: + license = constants.LICENSES.get( + m.get_extra_info_json().get('license'), {} + ).get('locative') + if license: + licenses.add(license) + readme = render_to_string('catalogue/audiobook_zip_readme.txt', { + 'licenses': licenses, + 'meta': self.wldocument2().meta, + }) + return create_zip(paths, "%s_%s" % (self.slug, format_), {'informacje.txt': readme}) + + def search_index(self, index=None): + if not self.findable: + return + from search.index import Index + Index.index_book(self) # will make problems in conjunction with paid previews def download_pictures(self, remote_gallery_url): + # This is only needed for legacy relative image paths. gallery_path = self.gallery_path() # delete previous files, so we don't include old files in ebooks if os.path.isdir(gallery_path): @@ -419,8 +549,10 @@ class Book(models.Model): makedirs(gallery_path) for ilustr in ilustr_elements: ilustr_src = ilustr.get('src') + if '/' in ilustr_src: + continue ilustr_path = os.path.join(gallery_path, ilustr_src) - urllib.urlretrieve('%s/%s' % (remote_gallery_url, ilustr_src), ilustr_path) + urlretrieve('%s/%s' % (remote_gallery_url, ilustr_src), ilustr_path) def load_abstract(self): abstract = self.wldocument(parse_dublincore=False).edoc.getroot().find('.//abstrakt') @@ -429,6 +561,20 @@ class Book(models.Model): else: self.abstract = '' + def load_toc(self): + self.toc = '' + if self.html_file: + parser = html.HTMLParser(encoding='utf-8') + tree = html.parse(self.html_file.path, parser=parser) + toc = tree.find('//div[@id="toc"]/ol') + if toc is None or not len(toc): + return + html_link = reverse('book_text', args=[self.slug]) + for a in toc.findall('.//a'): + a.attrib['href'] = html_link + a.attrib['href'] + self.toc = html.tostring(toc, encoding='unicode') + # div#toc + @classmethod def from_xml_file(cls, xml_file, **kwargs): from django.core.files import File @@ -447,7 +593,9 @@ class Book(models.Model): @classmethod def from_text_and_meta(cls, raw_file, book_info, overwrite=False, dont_build=None, search_index=True, - search_index_tags=True, remote_gallery_url=None, days=0): + remote_gallery_url=None, days=0, findable=True): + from catalogue import tasks + if dont_build is None: dont_build = set() dont_build = set.union(set(dont_build), set(app_settings.DONT_BUILD)) @@ -485,14 +633,16 @@ class Book(models.Model): if book.preview: book.xml_file.set_readable(False) + book.findable = findable 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.extra_info = book_info.to_dict() + book.extra_info = json.dumps(book_info.to_dict()) book.load_abstract() + book.load_toc() book.save() meta_tags = Tag.tags_from_info(book_info) @@ -503,6 +653,7 @@ class Book(models.Model): tag.save() book.tags = set(meta_tags + book_shelves) + book.save() # update sort_key_author cover_changed = old_cover != book.cover_info() obsolete_children = set(b for b in book.children.all() @@ -534,9 +685,11 @@ class Book(models.Model): # Build cover. if 'cover' not in dont_build: book.cover.build_delay() + book.cover_clean.build_delay() book.cover_thumb.build_delay() book.cover_api_thumb.build_delay() book.simple_cover.build_delay() + book.cover_ebookpoint.build_delay() # Build HTML and ebooks. book.html_file.build_delay() @@ -548,17 +701,62 @@ class Book(models.Model): if format_ not in dont_build: getattr(book, '%s_file' % format_).build_delay() - if not settings.NO_SEARCH_INDEX and search_index: - tasks.index_book.delay(book.id, book_info=book_info, index_tags=search_index_tags) + if not settings.NO_SEARCH_INDEX and search_index and findable: + tasks.index_book.delay(book.id) for child in notify_cover_changed: child.parent_cover_changed() - book.save() # update sort_key_author book.update_popularity() + tasks.update_references.delay(book.id) + cls.published.send(sender=cls, instance=book) return book + def get_master(self): + master_tags = [ + 'opowiadanie', + 'powiesc', + 'dramat_wierszowany_l', + 'dramat_wierszowany_lp', + 'dramat_wspolczesny', 'liryka_l', 'liryka_lp', + 'wywiad', + ] + from librarian.parser import WLDocument + wld = WLDocument.from_file(self.xml_file.path, parse_dublincore=False) + root = wld.edoc.getroot() + for master in root.iter(): + if master.tag in master_tags: + return master + + def update_references(self): + from references.models import Entity, Reference + master = self.get_master() + if master is None: + master = [] + found = set() + for i, sec in enumerate(master): + for ref in sec.findall('.//ref'): + href = ref.attrib.get('href', '') + if not href or href in found: + continue + found.add(href) + entity, created = Entity.objects.get_or_create( + uri=href + ) + ref, created = Reference.objects.get_or_create( + book=self, + entity=entity + ) + ref.first_section = 'sec%d' % (i + 1) + entity.populate() + entity.save() + Reference.objects.filter(book=self).exclude(entity__uri__in=found).delete() + + @property + def references(self): + return self.reference_set.all().select_related('entity') + @classmethod @transaction.atomic def repopulate_ancestors(cls): @@ -592,23 +790,18 @@ class Book(models.Model): b.ancestor.add(parent) parent = parent.parent - def flush_includes(self, languages=True): + @property + def ancestors(self): + if self.parent: + for anc in self.parent.ancestors: + yield anc + yield self.parent + else: + return [] + + def clear_cache(self): clear_cached_renders(self.mini_box) clear_cached_renders(self.mini_box_nolink) - 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/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. @@ -618,7 +811,7 @@ class Book(models.Model): need = False info = {} for field in ('cover_url', 'cover_by', 'cover_source'): - val = self.extra_info.get(field) + val = self.get_extra_info_json().get(field) if val: info[field] = val else: @@ -632,16 +825,18 @@ class Book(models.Model): 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') + counts=True).filter(category='theme').order_by('-count') 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_clean.build_delay() self.cover_thumb.build_delay() self.cover_api_thumb.build_delay() self.simple_cover.build_delay() + self.cover_ebookpoint.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() @@ -650,7 +845,7 @@ class Book(models.Model): 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) + return type(self).objects.filter(common_slug=self.common_slug, findable=True).exclude(pk=self.pk) def parents(self): books = [] @@ -672,7 +867,7 @@ class Book(models.Model): return ', '.join(names) def publisher(self): - publisher = self.extra_info['publisher'] + publisher = self.get_extra_info_json()['publisher'] if isinstance(publisher, str): return publisher elif isinstance(publisher, list): @@ -687,7 +882,7 @@ class Book(models.Model): """ objects = cls.tagged.with_all(tags) - return objects.exclude(ancestor__in=objects) + return objects.filter(findable=True).exclude(ancestor__in=objects) @classmethod def book_list(cls, book_filter=None): @@ -698,7 +893,7 @@ class Book(models.Model): """ books_by_parent = {} - books = cls.objects.order_by('parent_number', 'sort_key').only('title', 'parent', 'slug', 'extra_info') + books = cls.objects.filter(findable=True).order_by('parent_number', 'sort_key').only('title', 'parent', 'slug', 'extra_info') if book_filter: books = books.filter(book_filter).distinct() @@ -728,39 +923,50 @@ class Book(models.Model): 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"), - "SP3": (1, u"szkoła podstawowa"), - "P": (1, u"szkoła podstawowa"), - "G": (2, u"gimnazjum"), - "L": (3, u"liceum"), - "LP": (3, u"liceum"), + "SP": (1, "szkoła podstawowa"), + "SP1": (1, "szkoła podstawowa"), + "SP2": (1, "szkoła podstawowa"), + "SP3": (1, "szkoła podstawowa"), + "P": (1, "szkoła podstawowa"), + "G": (2, "gimnazjum"), + "L": (3, "liceum"), + "LP": (3, "liceum"), } def audiences_pl(self): - audiences = self.extra_info.get('audiences', []) + audiences = self.get_extra_info_json().get('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') + stage = self.get_extra_info_json().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): + def choose_fragments(self, number): 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)] + if fragments_count > number: + offset = randint(0, fragments_count - number) + else: + offset = 0 + return fragments[offset : offset + number] elif self.parent: - return self.parent.choose_fragment() + return self.parent.choose_fragments(number) + else: + return [] + + def choose_fragment(self): + fragments = self.choose_fragments(1) + if fragments: + return fragments[0] else: return None @@ -801,7 +1007,7 @@ class Book(models.Model): return self.SORT_KEY_SEP.join((self.sort_key_author, self.sort_key, str(self.id))) def cover_color(self): - return WLCover.epoch_colors.get(self.extra_info.get('epoch'), '#000000') + return WLCover.epoch_colors.get(self.get_extra_info_json().get('epoch'), '#000000') @cached_render('catalogue/book_mini_box.html') def mini_box(self): @@ -816,26 +1022,6 @@ class Book(models.Model): 'no_link': True, } -def add_file_fields(): - 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) - - -add_file_fields() - class BookPopularity(models.Model): book = models.OneToOneField(Book, models.CASCADE, related_name='popularity')