mailer: make attachment file field mandatory

jdav_web/mailer/migrations/0004_alter_attachment_f.py

@@ -0,0 +1,19 @@
+# Generated by Django 4.0.1 on 2024-11-17 23:31
+
+from django.db import migrations
+import utils
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('mailer', '0003_alter_message_options'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='attachment',
+            name='f',
+            field=utils.RestrictedFileField(upload_to='attachments', verbose_name='file'),
+        ),
+    ]

jdav_web/mailer/models.py

@@ -207,7 +207,6 @@ class Attachment(CommonModel):
     # file (not naming it file because of builtin)
     f = RestrictedFileField(_('file'),
                             upload_to='attachments',
-                            blank=True,
                             max_upload_size=10)
 
     def __str__(self):