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models: Add a partial index on unread DMs.

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This helps the find_first_unread_anchor call for DMs with a user.
This commit is contained in:
Alex Vandiver
2025-07-22 07:27:12 +00:00
committed by Tim Abbott
parent 04f7dd998b
commit 83acf70d0f
2 changed files with 31 additions and 0 deletions
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22
zerver/migrations/0742_usermessage_zerver_usermessage_is_private_unread_message_id.py Normal file
View File

@@ -0,0 +1,22 @@
from django.contrib.postgres.operations import AddIndexConcurrently
from django.db import migrations, models
class Migration(migrations.Migration):
atomic = False
dependencies = [
("zerver", "0741_pushdevice_zerver_pushdevice_user_bouncer_device_id_idx"),
]
operations = [
AddIndexConcurrently(
model_name="usermessage",
index=models.Index(
models.F("user_profile"),
models.F("message"),
condition=models.Q(("flags__andnz", 2048), ("flags__andz", 1)),
name="zerver_usermessage_is_private_unread_message_id",
),
),
migrations.RunSQL("ANALYZE zerver_usermessage"),
]

9
zerver/models/messages.py
View File

@@ -636,6 +636,15 @@ class UserMessage(AbstractUserMessage):
condition=Q(flags__andnz=AbstractUserMessage.flags.is_private.mask),
name="zerver_usermessage_is_private_message_id",
),
models.Index(
"user_profile",
"message",
condition=(
Q(flags__andnz=AbstractUserMessage.flags.is_private.mask)
& Q(flags__andz=AbstractUserMessage.flags.read.mask)
),
name="zerver_usermessage_is_private_unread_message_id",
),
models.Index(
"user_profile",
"message",