fix: use complete URL

src/fellchensammlung/models.py

@@ -14,7 +14,7 @@ from django.contrib.auth.models import AbstractUser
 from django.core.exceptions import ValidationError
 
 from .tools import misc, geo
-from notfellchen.settings import MEDIA_URL
+from notfellchen.settings import MEDIA_URL, base_url
 from .tools.geo import LocationProxy, Position
 from .tools.misc import age_as_hr_string, time_since_as_hr_string
 
@@ -389,6 +389,10 @@ class AdoptionNotice(models.Model):
         """Returns the url to access a detailed page for the adoption notice."""
         return reverse('adoption-notice-detail', args=[str(self.id)])
 
+    def get_full_url(self):
+        """Returns the url including protocol and domain"""
+        return f"{base_url}{self.get_absolute_url()}"
+
     def get_report_url(self):
         """Returns the url to report an adoption notice."""
         return reverse('report-adoption-notice', args=[str(self.id)])

src/fellchensammlung/templates/fellchensammlung/mail/notifications/an-to-be-checked.html

@@ -11,6 +11,6 @@
 
     </p>
     <p>
-        <a href="{{ notification.adoption_notice.get_absolute_url }}" class="cta-button">{% translate 'Vermittlung anzeigen' %}</a>
+        <a href="{{ notification.adoption_notice.get_full_url }}" class="cta-button">{% translate 'Vermittlung anzeigen' %}</a>
     </p>
 {% endblock %}