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"""
djeuscan.managers
"""
from django.db import models
from djeuscan.helpers import xint, rename_fields, select_related_last_versions
def _gen_n_function(field_name):
def n_method(self):
res = self.aggregate(models.Sum(field_name))[field_name + '__sum']
return xint(res)
n_method.func_name = field_name
return n_method
def _gen_for_function(field):
def for_method(self, val, last_versions=False):
"""
Returns packages that belong to the given parametrs
"""
res = self.filter(**{field: val})
if last_versions:
select_related_last_versions(res)
return res
for_method.func_name = 'for_' + field
return for_method
ANNOTATE_DICT = {name: models.Sum(name)
for name in ['n_packaged', 'n_overlay', 'n_versions']}
class PackageMixin(object):
for_maintainer = _gen_for_function('maintainers')
for_herd = _gen_for_function('herds')
for_category = _gen_for_function('category')
n_packaged = _gen_n_function("n_packaged")
n_overlay = _gen_n_function("n_overlay")
n_versions = _gen_n_function("n_versions")
def n_upstream(self):
return self.n_versions() - self.n_packaged() - self.n_overlay()
def categories(self):
"""
Returns all the available categories
"""
return self.values('category').annotate(**ANNOTATE_DICT)
def herds(self, ids=None, rename=False):
"""
Returns all the available herds
"""
# FIXME: optimize the query, it uses 'LEFT OUTER JOIN' instead of
# 'INNER JOIN'
if ids is not None:
res = self.filter(herds__id__in=ids)
else:
res = self.filter(herds__isnull=False)
res = res.values('herds__herd').annotate(**ANNOTATE_DICT)
if rename:
res = rename_fields(res, [('herds__herd', 'herd')])
return res
def maintainers(self, ids=None, rename=False):
"""
Returns all the available maintainers
"""
if ids is not None:
res = self.filter(maintainers__id__in=ids)
else:
res = self.filter(maintainers__isnull=False)
res = res.values(
'maintainers__id', 'maintainers__name', 'maintainers__email'
)
res = res.annotate(**ANNOTATE_DICT)
if rename:
res = rename_fields(
res,
[('maintainers__id', 'id'),
('maintainers__name', 'name'),
('maintainers__email', 'email')]
)
return res
def overlays(self):
"""
Returns the all available overlays
"""
res = self.values('version__overlay').exclude(version__overlay='')
return [o["version__overlay"] for o in res.distinct()]
def for_overlay(self, overlay):
"""
Returns packages that belong to the given overlay
"""
packages = self.values(
'id', 'name', 'category', 'n_versions', 'n_packaged', 'n_overlay'
)
return packages.filter(version__overlay=overlay).distinct()
class PackageQuerySet(models.query.QuerySet, PackageMixin):
pass
class PackageManager(models.Manager, PackageMixin):
def get_query_set(self):
return PackageQuerySet(self.model, using=self._db)
class VersionLogMixin(object):
def for_package(self, package, order=False):
res = self.filter(package=package)
if order:
res = res.order_by('-id')
return res
def for_maintainer(self, maintainer, order=False):
res = self.filter(package__maintainers__id=maintainer.id)
if order:
res = res.order_by('-id')
return res
def for_category(self, category, order=False):
res = self.filter(package__category=category)
if order:
res = res.order_by('-id')
return res
def for_herd(self, herd, order=False):
res = self.filter(package__herds__id=herd.id)
if order:
res = res.order_by('-id')
return res
class VersionLogQuerySet(models.query.QuerySet, VersionLogMixin):
pass
class VersionLogManager(models.Manager, VersionLogMixin):
def get_query_set(self):
return VersionLogQuerySet(self.model, using=self._db)
class EuscanResultMixin(object):
def for_package(self, package):
return self.filter(package=package)
def for_maintainer(self, maintainer):
return self.filter(package__maintainers__id=maintainer.id)
def for_category(self, category):
return self.filter(package__category=category)
def for_herd(self, herd):
return self.filter(package__herds__id=herd.id)
class EuscanResultQuerySet(models.query.QuerySet, EuscanResultMixin):
pass
class EuscanResultManager(models.Manager, EuscanResultMixin):
def get_query_set(self):
return EuscanResultQuerySet(self.model, using=self._db)
|
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