X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/357027375ff8867f42ca34bcbfb5a78b5b185fc3..084f20588e607aa9ae3ed280b6a2f0349b6a3200:/src/catalogue/models/fragment.py

diff --git a/src/catalogue/models/fragment.py b/src/catalogue/models/fragment.py
index a3dbdea54..ef15f85b4 100644
--- a/src/catalogue/models/fragment.py
+++ b/src/catalogue/models/fragment.py
@@ -1,10 +1,9 @@
-# -*- coding: utf-8 -*-
 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
 from django.conf import settings
 from django.contrib.contenttypes.fields import GenericRelation
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 from django.db import models
 from django.utils.translation import ugettext_lazy as _
 from newtagging import managers
@@ -17,7 +16,7 @@ class Fragment(models.Model):
     text = models.TextField()
     short_text = models.TextField(editable=False)
     anchor = models.CharField(max_length=120)
-    book = models.ForeignKey('Book', related_name='fragments')
+    book = models.ForeignKey('Book', models.CASCADE, related_name='fragments')
 
     objects = models.Manager()
     tagged = managers.ModelTaggedItemManager(Tag)
@@ -35,10 +34,17 @@ class Fragment(models.Model):
     def get_absolute_url(self):
         return '%s#m%s' % (reverse('book_text', args=[self.book.slug]), self.anchor)
 
+    def get_api_url(self):
+        return reverse('catalogue_api_fragment', args=[self.book.slug, self.anchor])
+
     def get_short_text(self):
         """Returns short version of the fragment."""
         return self.short_text if self.short_text else self.text
 
+    @property
+    def themes(self):
+        return self.tags.filter(category='theme')
+
     def flush_includes(self, languages=True):
         if not languages:
             return