diff options
| -rw-r--r-- | packages/models.py | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/packages/models.py b/packages/models.py index f57c9f3..a4d2a55 100644 --- a/packages/models.py +++ b/packages/models.py @@ -4,7 +4,7 @@ from django.db import models from django.db.models.signals import pre_save from django.contrib.auth.models import User -from main.models import Arch, Repo +from main.models import Arch, Repo, Package from main.utils import set_created_field class PackageRelation(models.Model): @@ -224,6 +224,40 @@ class RelatedToBase(models.Model): name = models.CharField(max_length=255, db_index=True) version = models.CharField(max_length=255, default='') + def get_best_satisfier(self): + '''Find a satisfier for this related package that best matches the + given criteria. It will not search provisions, but will find packages + named and matching repo characteristics if possible.''' + # NOTE: this is cribbed directly from the PackageDepend method of the + # same name. Really, all of these things could use the same method if + # the PackageDepend class was moved here and field names were changed + # to match the layout we use here. + pkgs = Package.objects.normal().filter(pkgname=self.name) + if not self.pkg.arch.agnostic: + # make sure we match architectures if possible + arches = self.pkg.applicable_arches() + pkgs = pkgs.filter(arch__in=arches) + if len(pkgs) == 0: + # couldn't find a package in the DB + # it should be a virtual depend (or a removed package) + return None + if len(pkgs) == 1: + return pkgs[0] + # more than one package, see if we can't shrink it down + # grab the first though in case we fail + pkg = pkgs[0] + # prevents yet more DB queries, these lists should be short; + # after each grab the best available in case we remove all entries + pkgs = [p for p in pkgs if p.repo.staging == self.pkg.repo.staging] + if len(pkgs) > 0: + pkg = pkgs[0] + + pkgs = [p for p in pkgs if p.repo.testing == self.pkg.repo.testing] + if len(pkgs) > 0: + pkg = pkgs[0] + + return pkg + def __unicode__(self): if self.version: return u'%s%s%s' % (self.name, self.comparison, self.version) |