[Patchew-devel] [PATCH 4/9] modify database in preparation for removing is_series_head

[Paolo Bonzini]

Otherwise, Django creates the RemoveField migration before AlterIndexTogether,
and the latter fails to apply.  Also add a default so that reverting the
removal works.

Signed-off-by: Paolo Bonzini <pbonzini at redhat.com>
---
 api/migrations/0055_auto_20200116_1034.py | 24 +++++++++++++++++++++++
 api/models.py                             | 11 +++++------
 2 files changed, 29 insertions(+), 6 deletions(-)
 create mode 100644 api/migrations/0055_auto_20200116_1034.py

diff --git a/api/migrations/0055_auto_20200116_1034.py b/api/migrations/0055_auto_20200116_1034.py
new file mode 100644
index 0000000..12ee668
--- /dev/null
+++ b/api/migrations/0055_auto_20200116_1034.py
@@ -0,0 +1,24 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.20 on 2020-01-16 10:56
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('api', '0054_populate_topic'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='message',
+            name='is_series_head',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AlterIndexTogether(
+            name='message',
+            index_together=set([('topic', 'date'), ('topic', 'project', 'last_reply_date'), ('topic', 'project', 'date'), ('topic', 'last_reply_date')]),
+        ),
+    ]
diff --git a/api/models.py b/api/models.py
index 6f4ea4b..0435527 100644
--- a/api/models.py
+++ b/api/models.py
@@ -457,7 +457,6 @@ class MessageManager(models.Manager):
         msg.stripped_subject = m.get_subject(strip_tags=True)
         msg.version = m.get_version()
         msg.prefixes = m.get_prefixes()
-        msg.is_series_head = False
         if m.is_series_head():
             msg.is_series_head = True
             msg.topic = Topic.objects.for_stripped_subject(msg.stripped_subject)
@@ -578,7 +577,7 @@ class Message(models.Model):
     recipients = jsonfield.JSONField()
     tags = jsonfield.JSONField(default=[])
     prefixes = jsonfield.JSONField(blank=True)
-    is_series_head = models.BooleanField()
+    is_series_head = models.BooleanField(default=False)
     is_complete = models.BooleanField(default=False)
     is_patch = models.BooleanField()
     is_merged = models.BooleanField(default=False, blank=True)
@@ -915,10 +914,10 @@ class Message(models.Model):
     class Meta:
         unique_together = ("project", "message_id")
         index_together = [
-            ("is_series_head", "project", "last_reply_date"),
-            ("is_series_head", "project", "date"),
-            ("is_series_head", "last_reply_date"),
-            ("is_series_head", "date"),
+            ("topic", "project", "last_reply_date"),
+            ("topic", "project", "date"),
+            ("topic", "last_reply_date"),
+            ("topic", "date"),
         ]
 
 
-- 
2.21.0