Add checkin_attetion field to Order model

src/pretix/base/migrations/0082_auto_20180222_0938.py

@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.10 on 2018-02-22 09:38
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0081_auto_20180220_1031'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='order',
+            name='checkin_attention',
+            field=models.BooleanField(default=False, help_text='If you set this, the check-in app will show a visible warning that tickets of this order require special attention. This will not show any details or custom message, so you need to brief your check-in staff how to handle these cases.', verbose_name='Requires special attention'),
+        ),
+        migrations.AlterField(
+            model_name='checkinlist',
+            name='include_pending',
+            field=models.BooleanField(default=False, help_text='With this option, people will be able to check in even if the order have not been paid. This only works with pretixdesk 0.3.0 or newer or pretixdroid 1.9 or newer.', verbose_name='Include pending orders'),
+        ),
+    ]

src/pretix/base/models/orders.py

@@ -162,6 +162,13 @@ class Order(LoggedModel):
         help_text=_("The text entered in this field will not be visible to the user and is available for your "
                     "convenience.")
     )
+    checkin_attention = models.BooleanField(
+        verbose_name=_('Requires special attention'),
+        default=False,
+        help_text=_('If you set this, the check-in app will show a visible warning that tickets of this order require '
+                    'special attention. This will not show any details or custom message, so you need to brief your '
+                    'check-in staff how to handle these cases.')
+    )
     expiry_reminder_sent = models.BooleanField(
         default=False
     )