Index Group kind and abbreviation

We're matching on them for group list and detail pages ...

representatives/migrations/0010_index_group_kind_and_abbreviation.py

+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('representatives', '0009_order_mandates_by_end_date_descendant'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='mandate',
+            options={'ordering': ('-end_date',)},
+        ),
+        migrations.AlterField(
+            model_name='group',
+            name='abbreviation',
+            field=models.CharField(default=b'', max_length=10, db_index=True, blank=True),
+        ),
+        migrations.AlterField(
+            model_name='group',
+            name='kind',
+            field=models.CharField(max_length=255, db_index=True),
+        ),
+    ]

representatives/models.py

@@ -158,8 +158,9 @@ class Group(HashableModel, TimeStampedModel):
     An entity represented by a representative through a mandate
     """
     name = models.CharField(max_length=255)
-    abbreviation = models.CharField(max_length=10, blank=True, default='')
-    kind = models.CharField(max_length=255, blank=True, default='')
+    abbreviation = models.CharField(max_length=10, blank=True, default='',
+        db_index=True)
+    kind = models.CharField(max_length=255, db_index=True)
 
     hashable_fields = ['name', 'abbreviation', 'kind']