From 31f4e5c059f6c54e19c6addbe4cdde7134005b2a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Laur=C3=A9line=20Gu=C3=A9rin?= <zebuline@entrouvert.com>
Date: Wed, 24 May 2023 20:48:19 +0200
Subject: [PATCH] agendas: add an index on Event (#77590)

---
 chrono/agendas/migrations/0153_event_index.py | 21 +++++++++++++++++++
 chrono/agendas/models.py                      |  8 +++++++
 2 files changed, 29 insertions(+)
 create mode 100644 chrono/agendas/migrations/0153_event_index.py

diff --git a/chrono/agendas/migrations/0153_event_index.py b/chrono/agendas/migrations/0153_event_index.py
new file mode 100644
index 00000000..793df915
--- /dev/null
+++ b/chrono/agendas/migrations/0153_event_index.py
@@ -0,0 +1,21 @@
+import django.db.models.expressions
+import django.db.models.functions.datetime
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('agendas', '0152_auto_20230331_0834'),
+    ]
+
+    operations = [
+        migrations.AddIndex(
+            model_name='event',
+            index=models.Index(
+                django.db.models.functions.datetime.ExtractWeekDay('start_datetime'),
+                django.db.models.expressions.F('start_datetime'),
+                condition=models.Q(('cancelled', False)),
+                name='start_datetime_dow_index',
+            ),
+        ),
+    ]
diff --git a/chrono/agendas/models.py b/chrono/agendas/models.py
index ad79834a..013054a8 100644
--- a/chrono/agendas/models.py
+++ b/chrono/agendas/models.py
@@ -1536,6 +1536,14 @@ class Event(models.Model):
     class Meta:
         ordering = ['agenda', 'start_datetime', 'duration', 'label']
         unique_together = ('agenda', 'slug')
+        indexes = [
+            models.Index(
+                ExtractWeekDay('start_datetime'),
+                'start_datetime',
+                name='start_datetime_dow_index',
+                condition=models.Q(cancelled=False),
+            )
+        ]
 
     def __str__(self):
         if self.label: