order LocationGroups by their category first

src/c3nav/mapdata/migrations/0023_auto_20170711_1741.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.2 on 2017-07-11 15:41
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('mapdata', '0022_remove_space_category'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='locationgroup',
+            options={'ordering': ('-category__priority', '-priority'), 'verbose_name': 'Location Group', 'verbose_name_plural': 'Location Groups'},
+        ),
+    ]

src/c3nav/mapdata/models/locations.py

@@ -185,7 +185,7 @@ class LocationGroup(Location, models.Model):
         verbose_name = _('Location Group')
         verbose_name_plural = _('Location Groups')
         default_related_name = 'locationgroups'
-        ordering = ('-priority',)
+        ordering = ('-category__priority', '-priority')
 
     def _serialize(self, **kwargs):
         result = super()._serialize(**kwargs)