124 lines
3.3 KiB
Python
124 lines
3.3 KiB
Python
"""
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djeuscan.managers
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"""
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from django.db import models
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from djeuscan.helpers import xint, rename_fields, select_related_last_versions
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def gen_n_function(field_name):
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def n_method(self):
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res = self.aggregate(models.Sum(field_name))[field_name + '__sum']
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return xint(res)
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n_method.func_name = field_name
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return n_method
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N_LIST = ['n_packaged','n_overlay','n_versions']
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ANNOTATE_DICT = { name: models.Sum(name) for name in N_LIST }
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class PackageMixin(object):
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for name in N_LIST:
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locals()[name] = gen_n_function(name)
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def n_upstream(self):
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return self.n_versions() - self.n_packaged() - self.n_overlay()
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def categories(self):
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"""
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Returns all the available categories
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"""
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return self.values('category').annotate(**ANNOTATE_DICT)
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def herds(self, rename=False):
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"""
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Returns all the available herds
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"""
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# FIXME: optimize the query, it uses 'LEFT OUTER JOIN' instead of
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# 'INNER JOIN'
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res = self.filter(herds__isnull=False)
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res = res.values('herds__herd').annotate(**ANNOTATE_DICT)
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if rename:
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res = rename_fields(res, [('herds__herd', 'herd')])
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return res
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def maintainers(self, rename=False):
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"""
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Returns all the available maintainers
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"""
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res = self.filter(maintainers__isnull=False).values(
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'maintainers__id', 'maintainers__name', 'maintainers__email'
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)
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res = res.annotate(**ANNOTATE_DICT)
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if rename:
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res = rename_fields(
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res,
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[('maintainers__id', 'id'),
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('maintainers__name', 'name'),
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('maintainers__email', 'email')]
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)
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return res
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def overlays(self):
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"""
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Returns the all available overlays
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"""
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res = self.values('version__overlay').exclude(version__overlay='')
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return res.distinct()
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def for_overlay(self, overlay):
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"""
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Returns packages that belong to the given overlay
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"""
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packages = self.values(
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'id', 'name', 'category', 'n_versions', 'n_packaged', 'n_overlay'
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)
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return packages.filter(version__overlay=overlay).distinct()
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def for_maintainer(self, maintainer, last_versions=False):
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"""
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Returns packages that belong to the given maintainer
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"""
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res = self.filter(maintainers__id=maintainer.id)
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if last_versions:
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select_related_last_versions(res)
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return res
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def for_herd(self, herd, last_versions=False):
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"""
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Returns packages that belong to the given herd
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"""
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res = self.filter(herds__id=herd.id)
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if last_versions:
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select_related_last_versions(res)
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return res
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def for_category(self, category, last_versions=False):
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"""
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Returns packages that belong to the given category
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"""
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res = self.filter(category=category)
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if last_versions:
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select_related_last_versions(res)
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return res
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class PackageQuerySet(models.query.QuerySet, PackageMixin):
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pass
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class PackageManager(models.Manager, PackageMixin):
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def get_query_set(self):
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return PackageQuerySet(self.model, using=self._db)
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