app/django/contrib/sites/managers.py
author Lennard de Rijk <ljvderijk@gmail.com>
Tue, 25 Aug 2009 11:43:14 +0200
changeset 2795 776aae4d0499
parent 54 03e267d67478
permissions -rw-r--r--
Set new Melange version number to 0-5-20090825 in app.yaml.template.
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from django.conf import settings
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from django.db import models
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from django.db.models.fields import FieldDoesNotExist
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class CurrentSiteManager(models.Manager):
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    "Use this to limit objects to those associated with the current site."
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    def __init__(self, field_name='site'):
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        super(CurrentSiteManager, self).__init__()
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        self.__field_name = field_name
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        self.__is_validated = False
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    def get_query_set(self):
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        if not self.__is_validated:
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            try:
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                self.model._meta.get_field(self.__field_name)
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            except FieldDoesNotExist:
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                raise ValueError, "%s couldn't find a field named %s in %s." % \
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                    (self.__class__.__name__, self.__field_name, self.model._meta.object_name)
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            self.__is_validated = True
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        return super(CurrentSiteManager, self).get_query_set().filter(**{self.__field_name + '__id__exact': settings.SITE_ID})