columns can have an accessrestriction now

src/c3nav/mapdata/migrations/0003_column_access_restriction.py

@@ -0,0 +1,19 @@
+# Generated by Django 2.1.4 on 2018-12-12 17:47
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('mapdata', '0002_fix_broken_spaces'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='column',
+            name='access_restriction',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, related_name='columns', to='mapdata.AccessRestriction', verbose_name='Access Restriction'),
+        ),
+    ]