Use blank=True for voters

elections/migrations/0010_blank_voters.py

@@ -0,0 +1,28 @@
+# Generated by Django 2.2.19 on 2021-03-18 13:48
+
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("elections", "0009_auto_20210318_1441"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="election",
+            name="voters",
+            field=models.ManyToManyField(
+                blank=True, related_name="cast_elections", to=settings.AUTH_USER_MODEL
+            ),
+        ),
+        migrations.AlterField(
+            model_name="question",
+            name="voters",
+            field=models.ManyToManyField(
+                blank=True, related_name="cast_questions", to=settings.AUTH_USER_MODEL
+            ),
+        ),
+    ]

elections/models.py

@@ -37,6 +37,7 @@ class Election(models.Model):
     voters = models.ManyToManyField(
         settings.AUTH_USER_MODEL,
         related_name="cast_elections",
+        blank=True,
     )
 
     results_public = models.BooleanField(_("résultats publics"), default=False)
@@ -67,6 +68,7 @@ class Question(models.Model):
     voters = models.ManyToManyField(
         settings.AUTH_USER_MODEL,
         related_name="cast_questions",
+        blank=True,
     )
 
     class Meta:
@@ -82,6 +84,7 @@ class Option(models.Model):
         settings.AUTH_USER_MODEL,
         related_name="votes",
         through="Vote",
+        blank=True,
     )
     # For now, we store the amount of votes received after the election is tallied
     nb_votes = models.PositiveSmallIntegerField(_("nombre de votes reçus"), default=0)