fix morceau ordering

partitions/migrations/0007_auto_20220118_1542.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.2.24 on 2022-01-18 14:42
+
+from django.db import migrations
+import django.db.models.functions.text
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('partitions', '0006_auto_20220118_1525'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='partitionset',
+            options={'ordering': ('category', django.db.models.functions.text.Lower('nom')), 'verbose_name': 'Morceau', 'verbose_name_plural': 'Morceaux'},
+        ),
+    ]

partitions/models.py

@@ -71,7 +71,7 @@ class PartitionSet(models.Model):
     class Meta:
         verbose_name = _("Morceau")
         verbose_name_plural = _("Morceaux")
-        ordering = (Lower("nom"),)
+        ordering = ("category",Lower("nom"),)
 
 
 from datetime import date as ddate