Only consider a participant as a child if it is not 18 on the beginning of the tournament

apps/participation/views.py

@@ -391,7 +391,7 @@ class TeamAuthorizationsView(LoginRequiredMixin, DetailView):
                          _("Parental authorization of {participant}.{ext}")
                          .format(participant=str(participant), ext=ext))
 
-            if participant.health_sheet:
+            if isinstance(participant, StudentRegistration) and participant.health_sheet:
                 mime_type = magic.from_file("media/" + participant.health_sheet.name)
                 ext = mime_type.split("/")[1].replace("jpeg", "jpg")
                 zf.write("media/" + participant.health_sheet.name,

apps/registration/models.py

@@ -159,7 +159,13 @@ class ParticipantRegistration(Registration):
 
     @property
     def under_18(self):
-        return (timezone.now().date() - self.birth_date).days < 18 * 365.24
+        important_date = timezone.now().date()
+        if self.team and self.team.participation.tournament:
+            important_date = self.team.participation.tournament.date_start
+            if self.team.participation.final:
+                from participation.models import Tournament
+                important_date = Tournament.final_tournament().date_start
+        return (important_date - self.birth_date).days < 18 * 365.24
 
     @property
     def type(self):  # pragma: no cover