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61 lines
2.2 KiB
61 lines
2.2 KiB
from django.contrib.messages import MessageFailure
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from django.db.models.signals import pre_delete
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from django.dispatch import receiver
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from django.shortcuts import resolve_url
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from django.utils.translation import gettext_lazy as _
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from django.db import models
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from djing.lib import MyChoicesAdapter
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from gw_app.nas_managers import NAS_TYPES
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class NASModel(models.Model):
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title = models.CharField(_('Title'), max_length=127, unique=True)
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ip_address = models.GenericIPAddressField(_('Ip address'), unique=True)
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ip_port = models.PositiveSmallIntegerField(_('Port'))
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auth_login = models.CharField(_('Auth login'), max_length=64)
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auth_passw = models.CharField(_('Auth password'), max_length=127)
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nas_type = models.CharField(_('Type'), max_length=4, choices=MyChoicesAdapter(NAS_TYPES), default=NAS_TYPES[0][0])
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default = models.BooleanField(_('Is default'), default=False)
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enabled = models.BooleanField(_('Enabled'), default=True)
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def get_nas_manager_klass(self):
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try:
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return next(klass for code, klass in NAS_TYPES if code == self.nas_type)
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except StopIteration:
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raise TypeError(_('One of nas types implementation is not found'))
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def get_nas_manager(self):
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klass = self.get_nas_manager_klass()
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if hasattr(self, '_nas_mngr'):
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o = getattr(self, '_nas_mngr')
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else:
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o = klass(
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login=self.auth_login,
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password=self.auth_passw,
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ip=self.ip_address,
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port=int(self.ip_port),
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enabled=bool(self.enabled)
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)
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setattr(self, '_nas_mngr', o)
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return o
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def get_absolute_url(self):
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return resolve_url('gw_app:edit', self.pk)
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def __str__(self):
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return self.title
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class Meta:
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db_table = 'nas'
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verbose_name = _('Network access server. Gateway')
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verbose_name_plural = _('Network access servers. Gateways')
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ordering = 'ip_address',
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@receiver(pre_delete, sender=NASModel)
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def nas_pre_delete(sender, **kwargs):
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nas = kwargs.get("instance")
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# check if this nas is default.
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# You cannot remove default server
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if nas.default:
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raise MessageFailure(_('You cannot remove default server'))
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