44 lines
1.1 KiB
Python
44 lines
1.1 KiB
Python
from django.db import models
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from django.utils.translation import ugettext_lazy as _
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from django.contrib.auth.models import AnonymousUser
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SINGLETON_LOCK_ID = 1
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class SingletonManager(models.Manager):
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def get(self, **kwargs):
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instance, created = self.model.objects.get_or_create(lock_id=SINGLETON_LOCK_ID, **kwargs)
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return instance
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class Singleton(models.Model):
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lock_id = models.CharField(max_length=1, default=SINGLETON_LOCK_ID, editable=False, verbose_name=_(u'lock field'), unique=True)
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objects = SingletonManager()
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def save(self, *args, **kwargs):
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self.id = 1
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super(Singleton, self).save(*args, **kwargs)
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def delete(self):
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pass
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class Meta:
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abstract = True
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class AnonymousUserSingletonManager(SingletonManager):
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def passthru_check(self, user):
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if isinstance(user, AnonymousUser):
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return self.model.objects.get()
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else:
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return user
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class AnonymousUserSingleton(Singleton):
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objects = AnonymousUserSingletonManager()
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class Meta:
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verbose_name = _(u'anonymous user')
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verbose_name_plural = _(u'anonymous user')
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