Experiment with indexes

pymess/migrations/0030_migration.py

@@ -2,6 +2,7 @@
 
 import django.db.models.deletion
 from django.db import migrations, models
+
 from utils.migrations import migration_print
 
 
@@ -91,6 +92,41 @@ class Migration(migrations.Migration):
             field=models.SlugField(blank=True, max_length=100, null=True),
         ),
 
+        # We add indexes to speed-up insertion.
+
+        migrations.AddIndex(
+            model_name='dialermessage',
+            index=models.Index(fields=['template_old'], name='pymess_dial_templat_8f8f2d_idx'),
+        ),
+        migrations.AddIndex(
+            model_name='dialertemplatedisallowedobject',
+            index=models.Index(fields=['template_old'], name='pymess_dial_templat_94e496_idx'),
+        ),
+        migrations.AddIndex(
+            model_name='emailmessage',
+            index=models.Index(fields=['template_old'], name='pymess_emai_templat_751e5f_idx'),
+        ),
+        migrations.AddIndex(
+            model_name='emailtemplateattachment',
+            index=models.Index(fields=['template_old'], name='pymess_emai_templat_1e5760_idx'),
+        ),
+        migrations.AddIndex(
+            model_name='emailtemplatedisallowedobject',
+            index=models.Index(fields=['template_old'], name='pymess_emai_templat_799bce_idx'),
+        ),
+        migrations.AddIndex(
+            model_name='outputsmsmessage',
+            index=models.Index(fields=['template_old'], name='pymess_outp_templat_f4eb8d_idx'),
+        ),
+        migrations.AddIndex(
+            model_name='pushnotificationmessage',
+            index=models.Index(fields=['template_old'], name='pymess_push_templat_8d32eb_idx'),
+        ),
+        migrations.AddIndex(
+            model_name='smstemplatedisallowedobject',
+            index=models.Index(fields=['template_old'], name='pymess_smst_templat_1a34e4_idx'),
+        ),
+
         # 2. Rename 'template' -> 'template_old'
 
         migrations.RenameField(
@@ -273,7 +309,40 @@ class Migration(migrations.Migration):
 
         migrations.RunPython(create_template_ids_from_slugs),
 
-        # 8. We can safely remove old `template_old` field.
+        # 8. We can safely remove old `template_old` fields and their indexes.
+
+        migrations.RemoveIndex(
+            model_name='dialermessage',
+            name='pymess_dial_templat_8f8f2d_idx',
+        ),
+        migrations.RemoveIndex(
+            model_name='dialertemplatedisallowedobject',
+            name='pymess_dial_templat_94e496_idx',
+        ),
+        migrations.RemoveIndex(
+            model_name='emailmessage',
+            name='pymess_emai_templat_751e5f_idx',
+        ),
+        migrations.RemoveIndex(
+            model_name='emailtemplateattachment',
+            name='pymess_emai_templat_1e5760_idx',
+        ),
+        migrations.RemoveIndex(
+            model_name='emailtemplatedisallowedobject',
+            name='pymess_emai_templat_799bce_idx',
+        ),
+        migrations.RemoveIndex(
+            model_name='outputsmsmessage',
+            name='pymess_outp_templat_f4eb8d_idx',
+        ),
+        migrations.RemoveIndex(
+            model_name='pushnotificationmessage',
+            name='pymess_push_templat_8d32eb_idx',
+        ),
+        migrations.RemoveIndex(
+            model_name='smstemplatedisallowedobject',
+            name='pymess_smst_templat_1a34e4_idx',
+        ),
 
         migrations.RemoveField(
             model_name='dialertemplatedisallowedobject',