X-Git-Url: https://git.mdrn.pl/redakcja.git/blobdiff_plain/06e460b91c23f11e92bf5ae711a4ed2226d3a0c7..edf56edfdbea88b0e18c2e5aecbb6e62250ec3d7:/src/catalogue/models/book.py

diff --git a/src/catalogue/models/book.py b/src/catalogue/models/book.py
index 0ed8958c..fc0e18f6 100755
--- a/src/catalogue/models/book.py
+++ b/src/catalogue/models/book.py
@@ -1,11 +1,10 @@
-# -*- coding: utf-8 -*-
-#
 # This file is part of FNP-Redakcja, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
 from django.contrib.sites.models import Site
 from django.db import models, transaction
 from django.template.loader import render_to_string
+from django.urls import reverse
 from django.utils.translation import ugettext_lazy as _
 from django.conf import settings
 from slugify import slugify
@@ -28,10 +27,10 @@ class Book(models.Model):
     slug = models.SlugField(_('slug'), max_length=128, unique=True, db_index=True)
     public = models.BooleanField(_('public'), default=True, db_index=True)
     gallery = models.CharField(_('scan gallery name'), max_length=255, blank=True)
-    project = models.ForeignKey(Project, null=True, blank=True)
+    project = models.ForeignKey(Project, models.SET_NULL, null=True, blank=True)
 
     #wl_slug = models.CharField(_('title'), max_length=255, null=True, db_index=True, editable=False)
-    parent = models.ForeignKey('self', null=True, blank=True, verbose_name=_('parent'), related_name="children", editable=False)
+    parent = models.ForeignKey('self', models.SET_NULL, null=True, blank=True, verbose_name=_('parent'), related_name="children", editable=False)
     parent_number = models.IntegerField(_('parent number'), null=True, blank=True, db_index=True, editable=False)
 
     # Cache
@@ -66,18 +65,17 @@ class Book(models.Model):
     def __len__(self):
         return self.chunk_set.count()
 
-    def __nonzero__(self):
+    def __bool__(self):
         """
             Necessary so that __len__ isn't used for bool evaluation.
         """
         return True
 
-    def __unicode__(self):
+    def __str__(self):
         return self.title
 
-    @models.permalink
     def get_absolute_url(self):
-        return ("catalogue_book", [self.slug])
+        return reverse("catalogue_book", args=[self.slug])
 
     def correct_about(self):
         return "http://%s%s" % (
@@ -95,7 +93,7 @@ class Book(models.Model):
     # =======================
 
     def accessible(self, request):
-        return self.public or request.user.is_authenticated()
+        return self.public or request.user.is_authenticated
 
     @classmethod
     @transaction.atomic
@@ -266,12 +264,12 @@ class Book(models.Model):
 
         try:
             bi = self.wldocument(changes=changes, strict=True).book_info
-        except ParseError, e:
-            raise AssertionError(_('Invalid XML') + ': ' + unicode(e))
+        except ParseError as e:
+            raise AssertionError(_('Invalid XML') + ': ' + str(e))
         except NoDublinCore:
             raise AssertionError(_('No Dublin Core found.'))
-        except ValidationError, e:
-            raise AssertionError(_('Invalid Dublin Core') + ': ' + unicode(e))
+        except ValidationError as e:
+            raise AssertionError(_('Invalid Dublin Core') + ': ' + str(e))
 
         valid_about = self.correct_about()
         assert bi.about == valid_about, _("rdf:about is not") + " " + valid_about
@@ -279,7 +277,7 @@ class Book(models.Model):
     def publishable_error(self):
         try:
             return self.assert_publishable()
-        except AssertionError, e:
+        except AssertionError as e:
             return e
         else:
             return None