allow dots in email lookup

ephios/api/views/users.py

@@ -96,6 +96,7 @@ class UserByMailView(RetrieveModelMixin, GenericViewSet):
     filter_backends = [ObjectPermissionsFilter]
     lookup_url_kwarg = "email"
     lookup_field = "email"
+    lookup_value_regex = "[^/]+"  # customize to allow dots (".") in the lookup value
     schema = AutoSchema(operation_id_base="UserProfileByMail")
 
 

tests/api/test_user.py

@@ -0,0 +1,21 @@
+from django.urls import reverse
+
+
+def test_user_profile_list(django_app, groups, superuser):
+    response = django_app.get(reverse("api:userprofile-list"), user=superuser)
+    assert superuser.email in response
+
+
+def test_api_user_profile_by_email(django_app, superuser):
+    superuser.email = "special-char.123@toplevel.berlin"
+    superuser.save()
+    response = django_app.get(
+        reverse(
+            "api:user-by-email-detail",
+            kwargs={
+                "email": superuser.email,
+            },
+        ),
+        user=superuser,
+    )
+    assert superuser.email in response