X-Git-Url: https://git.mdrn.pl/redakcja.git/blobdiff_plain/3f7228b204d935f82de397313e58989c738f2f47..937a362ba8599c9571824493c13fed05223fb561:/src/catalogue/models.py?ds=sidebyside

diff --git a/src/catalogue/models.py b/src/catalogue/models.py
index 92b27651..f9a2ecfe 100644
--- a/src/catalogue/models.py
+++ b/src/catalogue/models.py
@@ -227,11 +227,15 @@ class Book(WikidataModel):
         return f'https://wolnelektury.pl/katalog/lektura/{self.slug}/'
     
     def authors_str(self):
+        if not self.pk:
+            return ''
         return ", ".join(str(author) for author in self.authors.all())
     authors_str.admin_order_field = 'authors__last_name'
     authors_str.short_description = _('Author')
 
     def translators_str(self):
+        if not self.pk:
+            return ''
         return ", ".join(str(author) for author in self.translators.all())
     translators_str.admin_order_field = 'translators__last_name'
     translators_str.short_description = _('Translator')