From 2c958511c41f53fb7de49ed4662eec966e0b76a5 Mon Sep 17 00:00:00 2001 From: Dan McGee Date: Tue, 22 Jan 2013 16:48:49 -0600 Subject: Use a subquery rather than two queries in attach_maintainers Now that we are using a database that doesn't stink, it makes more sense to do all of the stuff we need to do down at the database level. This helps a lot when 500+ packages are in play at a given time, such as some of our larger rebuild todo lists. Signed-off-by: Dan McGee --- packages/utils.py | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'packages') diff --git a/packages/utils.py b/packages/utils.py index a72404f4..49aeb8ce 100644 --- a/packages/utils.py +++ b/packages/utils.py @@ -6,6 +6,7 @@ import re from django.core.serializers.json import DjangoJSONEncoder from django.db import connection from django.db.models import Count, Max, F +from django.db.models.query import QuerySet from django.contrib.auth.models import User from main.models import Package, PackageFile, Arch, Repo @@ -253,8 +254,11 @@ def attach_maintainers(packages): '''Given a queryset or something resembling it of package objects, find all the maintainers and attach them to the packages to prevent N+1 query cascading.''' - packages = list(packages) - pkgbases = {p.pkgbase for p in packages if p is not None} + if isinstance(packages, QuerySet): + pkgbases = packages.values('pkgbase') + else: + packages = list(packages) + pkgbases = {p.pkgbase for p in packages if p is not None} rels = PackageRelation.objects.filter(type=PackageRelation.MAINTAINER, pkgbase__in=pkgbases).values_list( 'pkgbase', 'user_id').order_by().distinct() -- cgit v1.2.3-55-g3dc8