Add button to update notes

Add jury president field for pools

Signed-off-by: Emmy D'Anello <emmy.danello@animath.fr>

participation/models.py

@@ -8,7 +8,7 @@ from django.conf import settings
 from django.core.exceptions import ValidationError
 from django.core.validators import MaxValueValidator, MinValueValidator, RegexValidator
 from django.db import models
-from django.db.models import Index
+from django.db.models import F, Index, Q
 from django.urls import reverse_lazy
 from django.utils import timezone
 from django.utils.crypto import get_random_string
@@ -543,6 +543,15 @@ class Pool(models.Model):
         verbose_name=_("juries"),
     )
 
+    jury_president = models.ForeignKey(
+        VolunteerRegistration,
+        on_delete=models.SET_NULL,
+        null=True,
+        default=None,
+        related_name="pools_presided",
+        verbose_name=_("president of the jury"),
+    )
+
     bbb_url = models.CharField(
         max_length=255,
         blank=True,
@@ -573,6 +582,11 @@ class Pool(models.Model):
     def get_absolute_url(self):
         return reverse_lazy("participation:pool_detail", args=(self.pk,))
 
+    def validate_constraints(self, exclude=None):
+        if self.jury_president not in self.juries.all():
+            raise ValidationError({'jury_president': _("The president of the jury must be part of the jury.")})
+        return super().validate_constraints()
+
     def __str__(self):
         return _("Pool of day {round} for tournament {tournament} with teams {teams}")\
             .format(round=self.round,