Merge pull request #6 from pmontepagano/main

Check if url has been set in Page model

wagtail_pdf_view/mixins.py

@@ -127,7 +127,7 @@ def __init__(self, *args, **kwargs):
                 name = route_args[0]
 
                 url = self.url
-                if not url.endswith('/'):
+                if url and not url.endswith('/'):
                     url += '/'
 
                 setattr(self, "url_"+key, url+self.reverse_subpage(name))