app/django/contrib/sites/managers.py
author Pawel Solyga <Pawel.Solyga@gmail.com>
Sun, 08 Mar 2009 00:00:13 +0000
changeset 1731 254375a57d62
parent 54 03e267d67478
permissions -rw-r--r--
Add json2.js to repository under json folder, update build script and app.yaml.template files. This is pretty useful set of functions for JSON manipulation in Javascript, we will mostly use stringify function. This code is on Public Domain license and comes from http://www.json.org/js.html. Patch by: Pawel Solyga Reviewed by: to-be-reviewed

from django.conf import settings
from django.db import models
from django.db.models.fields import FieldDoesNotExist

class CurrentSiteManager(models.Manager):
    "Use this to limit objects to those associated with the current site."
    def __init__(self, field_name='site'):
        super(CurrentSiteManager, self).__init__()
        self.__field_name = field_name
        self.__is_validated = False

    def get_query_set(self):
        if not self.__is_validated:
            try:
                self.model._meta.get_field(self.__field_name)
            except FieldDoesNotExist:
                raise ValueError, "%s couldn't find a field named %s in %s." % \
                    (self.__class__.__name__, self.__field_name, self.model._meta.object_name)
            self.__is_validated = True
        return super(CurrentSiteManager, self).get_query_set().filter(**{self.__field_name + '__id__exact': settings.SITE_ID})