changed model to allow missing subsidy receiver

jdav_web/finance/migrations/0008_alter_statement_allowance_to_and_more.py

@@ -0,0 +1,25 @@
+# Generated by Django 4.0.1 on 2025-01-23 22:16
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('members', '0033_freizeit_approved_extra_youth_leader_count'),
+        ('finance', '0007_alter_statement_allowance_to'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='statement',
+            name='allowance_to',
+            field=models.ManyToManyField(blank=True, help_text='The youth leaders to which an allowance should be paid.', related_name='receives_allowance_for_statements', to='members.Member', verbose_name='Pay allowance to'),
+        ),
+        migrations.AlterField(
+            model_name='statement',
+            name='subsidy_to',
+            field=models.ForeignKey(blank=True, help_text='The person that should receive the subsidy for night and travel costs. Typically the person who paid for them.', null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='receives_subsidy_for_statements', to='members.member', verbose_name='Pay subsidy to'),
+        ),
+    ]

jdav_web/finance/models.py

@@ -62,9 +62,10 @@ class Statement(CommonModel):
     allowance_to = models.ManyToManyField(Member, verbose_name=_('Pay allowance to'),
                                           related_name='receives_allowance_for_statements',
                                           blank=True,
-                                          help_text=_('The youth leaders to which an allowance should be paid. The count must match the number of permitted youth leaders.'))
+                                          help_text=_('The youth leaders to which an allowance should be paid.'))
     subsidy_to = models.ForeignKey(Member, verbose_name=_('Pay subsidy to'),
                                    null=True,
+                                   blank=True,
                                    on_delete=models.SET_NULL,
                                    related_name='receives_subsidy_for_statements',
                                    help_text=_('The person that should receive the subsidy for night and travel costs. Typically the person who paid for them.'))
@@ -341,7 +342,10 @@ class Statement(CommonModel):
         The total amount of subsidies excluding the allowance, i.e. the transportation
         and night costs per youth leader multiplied with the real number of youth leaders.
         """
-        return (self.transportation_per_yl + self.nights_per_yl) * self.real_staff_count
+        if self.subsidy_to:
+            return (self.transportation_per_yl + self.nights_per_yl) * self.real_staff_count
+        else:
+            return cvt_to_decimal(0)
 
     @property
     def total_staff(self):