search fix
[wolnelektury.git] / src / catalogue / views.py
index 2ea5eb0..b4e5920 100644 (file)
@@ -3,40 +3,41 @@
 #
 from collections import OrderedDict
 import random
 #
 from collections import OrderedDict
 import random
+import re
+from urllib.parse import quote_plus
 
 from django.conf import settings
 
 from django.conf import settings
-from django.http.response import HttpResponseForbidden
 from django.template.loader import render_to_string
 from django.shortcuts import get_object_or_404, render, redirect
 from django.http import HttpResponse, HttpResponseRedirect, Http404, HttpResponsePermanentRedirect
 from django.template.loader import render_to_string
 from django.shortcuts import get_object_or_404, render, redirect
 from django.http import HttpResponse, HttpResponseRedirect, Http404, HttpResponsePermanentRedirect
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 from django.db.models import Q, QuerySet
 from django.contrib.auth.decorators import login_required, user_passes_test
 from django.db.models import Q, QuerySet
 from django.contrib.auth.decorators import login_required, user_passes_test
-from django.utils.http import urlquote_plus
 from django.utils import translation
 from django.utils import translation
-from django.utils.translation import ugettext as _, ugettext_lazy
+from django.utils.translation import gettext as _, gettext_lazy
+from django.views.decorators.cache import never_cache
 
 from ajaxable.utils import AjaxableFormView
 
 from ajaxable.utils import AjaxableFormView
-from club.models import Membership
+from club.forms import ScheduleForm, DonationStep1Form
+from club.models import Club
+from annoy.models import DynamicTextInsert
 from pdcounter import views as pdcounter_views
 from picture.models import Picture, PictureArea
 from pdcounter import views as pdcounter_views
 from picture.models import Picture, PictureArea
-from ssify import ssi_included, ssi_expect, SsiVariable as Var
 from catalogue import constants
 from catalogue import forms
 from catalogue.helpers import get_top_level_related_tags
 from catalogue.models import Book, Collection, Tag, Fragment
 from catalogue.utils import split_tags
 from catalogue.models.tag import prefetch_relations
 from catalogue import constants
 from catalogue import forms
 from catalogue.helpers import get_top_level_related_tags
 from catalogue.models import Book, Collection, Tag, Fragment
 from catalogue.utils import split_tags
 from catalogue.models.tag import prefetch_relations
-from wolnelektury.utils import is_crawler
 
 staff_required = user_passes_test(lambda user: user.is_staff)
 
 
 def catalogue(request):
     return render(request, 'catalogue/catalogue.html', {
 
 staff_required = user_passes_test(lambda user: user.is_staff)
 
 
 def catalogue(request):
     return render(request, 'catalogue/catalogue.html', {
-        'books': Book.objects.filter(parent=None),
+        'books': Book.objects.filter(findable=True, parent=None),
         'pictures': Picture.objects.all(),
         'pictures': Picture.objects.all(),
-        'collections': Collection.objects.all(),
+        'collections': Collection.objects.filter(listed=True),
         'active_menu_item': 'all_works',
     })
 
         'active_menu_item': 'all_works',
     })
 
@@ -61,12 +62,21 @@ def book_list(request, filters=None, template_name='catalogue/book_list.html',
 
 
 def daisy_list(request):
 
 
 def daisy_list(request):
+    if request.EXPERIMENTS['layout'].value:
+        return object_list(request, Book.objects.filter(media__type='daisy'))
     return book_list(request, Q(media__type='daisy'), template_name='catalogue/daisy_list.html')
 
 
 def collection(request, slug):
     coll = get_object_or_404(Collection, slug=slug)
     return book_list(request, Q(media__type='daisy'), template_name='catalogue/daisy_list.html')
 
 
 def collection(request, slug):
     coll = get_object_or_404(Collection, slug=slug)
-    return render(request, 'catalogue/collection.html', {'collection': coll})
+    if request.EXPERIMENTS['layout'].value:
+        template_name = 'catalogue/2022/collection.html'
+    else:
+        template_name = 'catalogue/collection.html'
+    return render(request, template_name, {
+        'collection': coll,
+        'active_menu_item': 'collections',
+    })
 
 
 def differentiate_tags(request, tags, ambiguous_slugs):
 
 
 def differentiate_tags(request, tags, ambiguous_slugs):
@@ -80,10 +90,13 @@ def differentiate_tags(request, tags, ambiguous_slugs):
         })
     return render(
         request,
         })
     return render(
         request,
-        'catalogue/differentiate_tags.html', {'tags': tags, 'options': options, 'unparsed': ambiguous_slugs[1:]})
+        'catalogue/differentiate_tags.html',
+        {'tags': tags, 'options': options, 'unparsed': ambiguous_slugs[1:]}
+    )
 
 
 
 
-def object_list(request, objects, fragments=None, related_tags=None, tags=None, list_type='books', extra=None):
+def object_list(request, objects, fragments=None, related_tags=None, tags=None,
+                list_type='books', extra=None):
     if not tags:
         tags = []
     tag_ids = [tag.pk for tag in tags]
     if not tags:
         tags = []
     tag_ids = [tag.pk for tag in tags]
@@ -93,7 +106,17 @@ def object_list(request, objects, fragments=None, related_tags=None, tags=None,
         related_tag_lists.append(related_tags)
     else:
         related_tag_lists.append(
         related_tag_lists.append(related_tags)
     else:
         related_tag_lists.append(
-            Tag.objects.usage_for_queryset(objects, counts=True).exclude(category='set').exclude(pk__in=tag_ids))
+            Tag.objects.usage_for_queryset(
+                objects, counts=True
+            ).exclude(category='set').exclude(pk__in=tag_ids))
+        if request.user.is_authenticated:
+            related_tag_lists.append(
+                Tag.objects.usage_for_queryset(
+                    objects, counts=True
+                ).filter(
+                    user=request.user
+                ).exclude(name='').exclude(pk__in=tag_ids)
+            )
     if not (extra and extra.get('theme_is_set')):
         if fragments is None:
             if list_type == 'gallery':
     if not (extra and extra.get('theme_is_set')):
         if fragments is None:
             if list_type == 'gallery':
@@ -101,12 +124,18 @@ def object_list(request, objects, fragments=None, related_tags=None, tags=None,
             else:
                 fragments = Fragment.objects.filter(book__in=objects)
         related_tag_lists.append(
             else:
                 fragments = Fragment.objects.filter(book__in=objects)
         related_tag_lists.append(
-            Tag.objects.usage_for_queryset(fragments, counts=True).filter(category='theme').exclude(pk__in=tag_ids)
+            Tag.objects.usage_for_queryset(
+                fragments, counts=True
+            ).filter(category='theme').exclude(pk__in=tag_ids)
             .only('name', 'sort_key', 'category', 'slug'))
         if isinstance(objects, QuerySet):
             objects = prefetch_relations(objects, 'author')
 
             .only('name', 'sort_key', 'category', 'slug'))
         if isinstance(objects, QuerySet):
             objects = prefetch_relations(objects, 'author')
 
+    
     categories = split_tags(*related_tag_lists)
     categories = split_tags(*related_tag_lists)
+    suggest = []
+    for c in ['set', 'author', 'epoch', 'kind', 'genre']:
+        suggest.extend(sorted(categories[c], key=lambda t: -t.count)[:3])
 
     objects = list(objects)
 
 
     objects = list(objects)
 
@@ -122,6 +151,7 @@ def object_list(request, objects, fragments=None, related_tags=None, tags=None,
     result = {
         'object_list': objects,
         'categories': categories,
     result = {
         'object_list': objects,
         'categories': categories,
+        'suggest': suggest,
         'list_type': list_type,
         'tags': tags,
 
         'list_type': list_type,
         'tags': tags,
 
@@ -131,14 +161,25 @@ def object_list(request, objects, fragments=None, related_tags=None, tags=None,
     }
     if extra:
         result.update(extra)
     }
     if extra:
         result.update(extra)
+
+    is_theme = len(tags) == 1 and tags[0].category == 'theme'
+    has_theme = any((x.category == 'theme' for x in tags))
+    new_layout = request.EXPERIMENTS['layout']
+
+    if is_theme and new_layout.value:
+        template = 'catalogue/2022/theme_detail.html'
+    elif new_layout.value and not has_theme:
+        template = 'catalogue/2022/author_detail.html'
+    else:
+        template = 'catalogue/tagged_object_list.html'
+        
     return render(
     return render(
-        request,
-        'catalogue/tagged_object_list.html', result,
+        request, template, result,
     )
 
 
 def literature(request):
     )
 
 
 def literature(request):
-    books = Book.objects.filter(parent=None)
+    books = Book.objects.filter(parent=None, findable=True)
     return object_list(request, books, related_tags=get_top_level_related_tags([]))
 
 
     return object_list(request, books, related_tags=get_top_level_related_tags([]))
 
 
@@ -147,9 +188,9 @@ def gallery(request):
 
 
 def audiobooks(request):
 
 
 def audiobooks(request):
-    audiobooks = Book.objects.filter(media__type__in=('mp3', 'ogg')).distinct()
+    audiobooks = Book.objects.filter(findable=True, media__type__in=('mp3', 'ogg')).distinct()
     return object_list(request, audiobooks, list_type='audiobooks', extra={
     return object_list(request, audiobooks, list_type='audiobooks', extra={
-        'daisy': Book.objects.filter(media__type='daisy').distinct(),
+        'daisy': Book.objects.filter(findable=True, media__type='daisy').distinct(),
     })
 
 
     })
 
 
@@ -168,8 +209,7 @@ def analyse_tags(request, tag_str):
         chunks = tag_str.split('/')
         if len(chunks) == 2 and chunks[0] == 'autor':
             raise ResponseInstead(pdcounter_views.author_detail(request, chunks[1]))
         chunks = tag_str.split('/')
         if len(chunks) == 2 and chunks[0] == 'autor':
             raise ResponseInstead(pdcounter_views.author_detail(request, chunks[1]))
-        else:
-            raise Http404
+        raise Http404
     except Tag.MultipleObjectsReturned as e:
         # Ask the user to disambiguate
         raise ResponseInstead(differentiate_tags(request, e.tags, e.ambiguous_slugs))
     except Tag.MultipleObjectsReturned as e:
         # Ask the user to disambiguate
         raise ResponseInstead(differentiate_tags(request, e.tags, e.ambiguous_slugs))
@@ -198,6 +238,8 @@ def theme_list(request, tags, list_type):
         # TODO: Pictures on shelves not supported yet.
         books = Book.tagged.with_all(shelf_tags).order_by()
         fragments = fragments.filter(Q(book__in=books) | Q(book__ancestor__in=books))
         # TODO: Pictures on shelves not supported yet.
         books = Book.tagged.with_all(shelf_tags).order_by()
         fragments = fragments.filter(Q(book__in=books) | Q(book__ancestor__in=books))
+    elif list_type == 'books':
+        fragments = fragments.filter(book__findable=True)
 
     if not fragments and len(tags) == 1 and list_type == 'books':
         if PictureArea.tagged.with_any(tags).exists() or Picture.tagged.with_any(tags).exists():
 
     if not fragments and len(tags) == 1 and list_type == 'books':
         if PictureArea.tagged.with_any(tags).exists() or Picture.tagged.with_any(tags).exists():
@@ -215,9 +257,6 @@ def tagged_object_list(request, tags, list_type):
     except ResponseInstead as e:
         return e.response
 
     except ResponseInstead as e:
         return e.response
 
-    if is_crawler(request) and len(tags) > 1:
-        return HttpResponseForbidden('address removed from crawling. check robots.txt')
-
     if list_type == 'gallery' and any(tag.category == 'set' for tag in tags):
         raise Http404
 
     if list_type == 'gallery' and any(tag.category == 'set' for tag in tags):
         raise Http404
 
@@ -230,19 +269,22 @@ def tagged_object_list(request, tags, list_type):
         if any(tag.category == 'set' for tag in tags):
             params = {'objects': books}
         else:
         if any(tag.category == 'set' for tag in tags):
             params = {'objects': books}
         else:
+            books = books.filter(findable=True)
             params = {
             params = {
-                'objects': Book.tagged_top_level(tags),
+                'objects': Book.tagged_top_level(tags).filter(findable=True),
                 'fragments': Fragment.objects.filter(book__in=books),
                 'related_tags': get_top_level_related_tags(tags),
             }
     elif list_type == 'gallery':
         params = {'objects': Picture.tagged.with_all(tags)}
     elif list_type == 'audiobooks':
                 'fragments': Fragment.objects.filter(book__in=books),
                 'related_tags': get_top_level_related_tags(tags),
             }
     elif list_type == 'gallery':
         params = {'objects': Picture.tagged.with_all(tags)}
     elif list_type == 'audiobooks':
-        audiobooks = Book.objects.filter(media__type__in=('mp3', 'ogg')).distinct()
+        audiobooks = Book.objects.filter(findable=True, media__type__in=('mp3', 'ogg')).distinct()
         params = {
             'objects': Book.tagged.with_all(tags, audiobooks),
             'extra': {
         params = {
             'objects': Book.tagged.with_all(tags, audiobooks),
             'extra': {
-                'daisy': Book.tagged.with_all(tags, audiobooks.filter(media__type='daisy').distinct()),
+                'daisy': Book.tagged.with_all(
+                    tags, audiobooks.filter(media__type='daisy').distinct()
+                ),
             }
         }
     else:
             }
         }
     else:
@@ -257,9 +299,14 @@ def book_fragments(request, slug, theme_slug):
     fragments = Fragment.tagged.with_all([theme]).filter(
         Q(book=book) | Q(book__ancestor=book))
 
     fragments = Fragment.tagged.with_all([theme]).filter(
         Q(book=book) | Q(book__ancestor=book))
 
+    if request.EXPERIMENTS['layout'].value:
+        template_name = 'catalogue/2022/book_fragments.html'
+    else:
+        template_name = 'catalogue/book_fragments.html'
+    
     return render(
         request,
     return render(
         request,
-        'catalogue/book_fragments.html',
+        template_name,
         {
             'book': book,
             'theme': theme,
         {
             'book': book,
             'theme': theme,
@@ -268,19 +315,28 @@ def book_fragments(request, slug, theme_slug):
         })
 
 
         })
 
 
+@never_cache
 def book_detail(request, slug):
     try:
         book = Book.objects.get(slug=slug)
     except Book.DoesNotExist:
         return pdcounter_views.book_stub_detail(request, slug)
 
 def book_detail(request, slug):
     try:
         book = Book.objects.get(slug=slug)
     except Book.DoesNotExist:
         return pdcounter_views.book_stub_detail(request, slug)
 
+    new_layout = request.EXPERIMENTS['layout']
+    
     return render(
         request,
     return render(
         request,
-        'catalogue/book_detail.html',
+        'catalogue/2022/book_detail.html' if new_layout.value else 'catalogue/book_detail.html',
         {
             'book': book,
         {
             'book': book,
+            'accessible': book.is_accessible_to(request.user),
             'book_children': book.children.all().order_by('parent_number', 'sort_key'),
             'active_menu_item': 'books',
             'book_children': book.children.all().order_by('parent_number', 'sort_key'),
             'active_menu_item': 'books',
+            'club_form': ScheduleForm() if book.preview else None,
+            'club': Club.objects.first() if book.preview else None,
+            'donation_form': DonationStep1Form(),
+
+            'EXPERIMENTS_SWITCHABLE_layout': True,
         })
 
 
         })
 
 
@@ -290,7 +346,7 @@ def player(request, slug):
     if not book.has_media('mp3'):
         raise Http404
 
     if not book.has_media('mp3'):
         raise Http404
 
-    audiobooks, projects = book.get_audiobooks()
+    audiobooks, projects, total_duration = book.get_audiobooks()
 
     return render(
         request,
 
     return render(
         request,
@@ -306,12 +362,19 @@ def player(request, slug):
 def book_text(request, slug):
     book = get_object_or_404(Book, slug=slug)
 
 def book_text(request, slug):
     book = get_object_or_404(Book, slug=slug)
 
-    if book.preview and not Membership.is_active_for(request.user):
+    if not book.is_accessible_to(request.user):
         return HttpResponseRedirect(book.get_absolute_url())
 
     if not book.has_html_file():
         raise Http404
         return HttpResponseRedirect(book.get_absolute_url())
 
     if not book.has_html_file():
         raise Http404
-    return render(request, 'catalogue/book_text.html', {'book': book})
+    with book.html_file.open('r') as f:
+        book_text = f.read()
+
+    return render(request, 'catalogue/book_text.html', {
+        'book': book,
+        'book_text': book_text,
+        'inserts': DynamicTextInsert.get_all(request)
+    })
 
 
 # =========
 
 
 # =========
@@ -333,11 +396,13 @@ def import_book(request):
             exception = pprint.pformat(info[1])
             tb = '\n'.join(traceback.format_tb(info[2]))
             return HttpResponse(
             exception = pprint.pformat(info[1])
             tb = '\n'.join(traceback.format_tb(info[2]))
             return HttpResponse(
-                    _("An error occurred: %(exception)s\n\n%(tb)s") % {'exception': exception, 'tb': tb},
-                    mimetype='text/plain')
+                _("An error occurred: %(exception)s\n\n%(tb)s") % {
+                    'exception': exception, 'tb': tb
+                },
+                content_type='text/plain'
+            )
         return HttpResponse(_("Book imported successfully"))
         return HttpResponse(_("Book imported successfully"))
-    else:
-        return HttpResponse(_("Error importing file: %r") % book_import_form.errors)
+    return HttpResponse(_("Error importing file: %r") % book_import_form.errors)
 
 
 # info views for API
 
 
 # info views for API
@@ -354,33 +419,34 @@ def tag_info(request, tag_id):
     return HttpResponse(tag.description)
 
 
     return HttpResponse(tag.description)
 
 
-def embargo_link(request, format_, slug):
+@never_cache
+def embargo_link(request, key, format_, slug):
     book = get_object_or_404(Book, slug=slug)
     if format_ not in Book.formats:
         raise Http404
     book = get_object_or_404(Book, slug=slug)
     if format_ not in Book.formats:
         raise Http404
+    if key != book.preview_key:
+        raise Http404
     media_file = book.get_media(format_)
     if not book.preview:
         return HttpResponseRedirect(media_file.url)
     media_file = book.get_media(format_)
     if not book.preview:
         return HttpResponseRedirect(media_file.url)
-    if not Membership.is_active_for(request.user):
-        return HttpResponseRedirect(book.get_absolute_url())
     return HttpResponse(media_file, content_type=constants.EBOOK_CONTENT_TYPES[format_])
 
 
     return HttpResponse(media_file, content_type=constants.EBOOK_CONTENT_TYPES[format_])
 
 
-def download_zip(request, format, slug=None):
-    if format in Book.ebook_formats:
-        url = Book.zip_format(format)
-    elif format in ('mp3', 'ogg') and slug is not None:
+def download_zip(request, file_format=None, media_format=None, slug=None):
+    if file_format:
+        url = Book.zip_format(file_format)
+    elif media_format and slug is not None:
         book = get_object_or_404(Book, slug=slug)
         book = get_object_or_404(Book, slug=slug)
-        url = book.zip_audiobooks(format)
+        url = book.zip_audiobooks(media_format)
     else:
         raise Http404('No format specified for zip package')
     else:
         raise Http404('No format specified for zip package')
-    return HttpResponseRedirect(urlquote_plus(settings.MEDIA_URL + url, safe='/?='))
+    return HttpResponseRedirect(quote_plus(settings.MEDIA_URL + url, safe='/?='))
 
 
 class CustomPDFFormView(AjaxableFormView):
     form_class = forms.CustomPDFForm
 
 
 class CustomPDFFormView(AjaxableFormView):
     form_class = forms.CustomPDFForm
-    title = ugettext_lazy('Download custom PDF')
-    submit = ugettext_lazy('Download')
+    title = gettext_lazy('Download custom PDF')
+    submit = gettext_lazy('Download')
     template = 'catalogue/custom_pdf_form.html'
     honeypot = True
 
     template = 'catalogue/custom_pdf_form.html'
     honeypot = True
 
@@ -395,7 +461,7 @@ class CustomPDFFormView(AjaxableFormView):
 
     def validate_object(self, obj, request):
         book = obj
 
     def validate_object(self, obj, request):
         book = obj
-        if book.preview and not Membership_is_active_for(request.user):
+        if not book.is_accessible_to(request.user):
             return HttpResponseRedirect(book.get_absolute_url())
         return super(CustomPDFFormView, self).validate_object(obj, request)
 
             return HttpResponseRedirect(book.get_absolute_url())
         return super(CustomPDFFormView, self).validate_object(obj, request)
 
@@ -407,83 +473,6 @@ class CustomPDFFormView(AjaxableFormView):
         return obj.pretty_title()
 
 
         return obj.pretty_title()
 
 
-####
-# Includes
-####
-
-
-@ssi_included
-def book_mini(request, pk, with_link=True):
-    # book = get_object_or_404(Book, pk=pk)
-    try:
-        book = Book.objects.only('cover_thumb', 'title', 'language', 'slug').get(pk=pk)
-    except Book.DoesNotExist:
-        raise Http404
-    return render(request, 'catalogue/book_mini_box.html', {
-        'book': book,
-        'no_link': not with_link,
-    })
-
-
-@ssi_included(get_ssi_vars=lambda pk: (lambda ipk: (
-        ('ssify.get_csrf_token',),
-        ('social_tags.likes_book', (ipk,)),
-        ('social_tags.book_shelf_tags', (ipk,)),
-    ))(ssi_expect(pk, int)))
-def book_short(request, pk):
-    book = get_object_or_404(Book, pk=pk)
-
-    return render(request, 'catalogue/book_short.html', {
-        'book': book,
-    })
-
-
-@ssi_included(
-    get_ssi_vars=lambda pk: book_short.get_ssi_vars(pk) +
-    (lambda ipk: (
-        ('social_tags.choose_cite', [ipk]),
-        ('catalogue_tags.choose_fragment', [ipk], {
-            'unless': Var('social_tags.choose_cite', [ipk])}),
-    ))(ssi_expect(pk, int)))
-def book_wide(request, pk):
-    book = get_object_or_404(Book, pk=pk)
-
-    return render(request, 'catalogue/book_wide.html', {
-        'book': book,
-    })
-
-
-@ssi_included
-def fragment_short(request, pk):
-    fragment = get_object_or_404(Fragment, pk=pk)
-    return render(request, 'catalogue/fragment_short.html', {'fragment': fragment})
-
-
-@ssi_included
-def fragment_promo(request, pk):
-    fragment = get_object_or_404(Fragment, pk=pk)
-    return render(request, 'catalogue/fragment_promo.html', {'fragment': fragment})
-
-
-@ssi_included
-def tag_box(request, pk):
-    tag = get_object_or_404(Tag, pk=pk)
-    assert tag.category != 'set'
-
-    return render(request, 'catalogue/tag_box.html', {
-        'tag': tag,
-    })
-
-
-@ssi_included
-def collection_box(request, pk):
-    collection = get_object_or_404(Collection, pk=pk)
-
-    return render(request, 'catalogue/collection_box.html', {
-        'collection': collection,
-    })
-
-
 def tag_catalogue(request, category):
     if category == 'theme':
         tags = Tag.objects.usage_for_model(
 def tag_catalogue(request, category):
     if category == 'theme':
         tags = Tag.objects.usage_for_model(
@@ -498,7 +487,12 @@ def tag_catalogue(request, category):
     else:
         best = described_tags
 
     else:
         best = described_tags
 
-    return render(request, 'catalogue/tag_catalogue.html', {
+    if request.EXPERIMENTS['layout'].value:
+        template_name = 'catalogue/2022/tag_catalogue.html'
+    else:
+        template_name = 'catalogue/tag_catalogue.html'
+
+    return render(request, template_name, {
         'tags': tags,
         'best': best,
         'title': constants.CATEGORIES_NAME_PLURAL[category],
         'tags': tags,
         'best': best,
         'title': constants.CATEGORIES_NAME_PLURAL[category],
@@ -508,16 +502,22 @@ def tag_catalogue(request, category):
 
 
 def collections(request):
 
 
 def collections(request):
-    objects = Collection.objects.all()
+    objects = Collection.objects.filter(listed=True)
 
     if len(objects) > 3:
 
     if len(objects) > 3:
-        best = random.sample(list(objects), 3)
+        best = random.sample(list(objects), 4)
     else:
         best = objects
 
     else:
         best = objects
 
-    return render(request, 'catalogue/collections.html', {
+    if request.EXPERIMENTS['layout'].value:
+        template_name = 'catalogue/2022/collections.html'
+    else:
+        template_name = 'catalogue/collections.html'
+
+    return render(request, template_name, {
         'objects': objects,
         'best': best,
         'objects': objects,
         'best': best,
+        'active_menu_item': 'collections'
     })
 
 
     })
 
 
@@ -532,4 +532,4 @@ def ridero_cover(request, slug):
 
 def get_isbn(request, book_format, slug):
     book = Book.objects.get(slug=slug)
 
 def get_isbn(request, book_format, slug):
     book = Book.objects.get(slug=slug)
-    return HttpResponse(book.extra_info.get('isbn_%s' % book_format))
+    return HttpResponse(book.get_extra_info_json().get('isbn_%s' % book_format))