X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/43946f0f9b1254d0b2ad76d72fd8c7a7fcb6106c..07cd561683d722537e51ca728c584abb7caec92f:/src/annoy/models.py

diff --git a/src/annoy/models.py b/src/annoy/models.py
index 097872b40..6af1cc045 100644
--- a/src/annoy/models.py
+++ b/src/annoy/models.py
@@ -66,7 +66,13 @@ class Banner(models.Model):
             return self.campaign.image
         else:
             return self.image
-    
+
+    def is_external(self):
+        return (self.url and
+                not self.url.startswith('/') and
+                not self.url.startswith('https://wolnelektury.pl/')
+                )
+
     @classmethod
     def choice(cls, place, request, exemptions=True, book=None):
         Membership = apps.get_model('club', 'Membership')