django-orchestra/orchestra/apps/saas/models.py

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from django.db import models
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from django.db.models.signals import pre_save, pre_delete
from django.dispatch import receiver
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from django.utils.functional import cached_property
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from django.utils.translation import ugettext_lazy as _
from jsonfield import JSONField
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from orchestra.core import services, validators
from orchestra.models.fields import NullableCharField
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from .fields import VirtualDatabaseRelation
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from .services import SoftwareService
class SaaS(models.Model):
service = models.CharField(_("service"), max_length=32,
choices=SoftwareService.get_choices())
name = models.CharField(_("Name"), max_length=64,
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help_text=_("Required. 64 characters or fewer. Letters, digits and ./-/_ only."),
validators=[validators.validate_username])
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account = models.ForeignKey('accounts.Account', verbose_name=_("account"),
related_name='saas')
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is_active = models.BooleanField(_("active"), default=True,
help_text=_("Designates whether this service should be treated as active. "))
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data = JSONField(_("data"), default={},
help_text=_("Extra information dependent of each service."))
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database = models.ForeignKey('databases.Database', null=True, blank=True)
# Some SaaS sites may need a database, with this virtual field we tell the ORM to delete them
databases = VirtualDatabaseRelation('databases.Database')
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class Meta:
verbose_name = "SaaS"
verbose_name_plural = "SaaS"
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unique_together = (
('name', 'service'),
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)
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def __str__(self):
return "%s@%s" % (self.name, self.service)
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@cached_property
def service_class(self):
return SoftwareService.get(self.service)
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@cached_property
def service_instance(self):
""" Per request lived service_instance """
return self.service_class(self)
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@cached_property
def active(self):
return self.is_active and self.account.is_active
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def clean(self):
self.data = self.service_instance.clean_data()
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def get_site_domain(self):
return self.service_instance.get_site_domain()
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def set_password(self, password):
self.password = password
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services.register(SaaS)
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# Admin bulk deletion doesn't call model.delete()
# So, signals are used instead of model method overriding
@receiver(pre_save, sender=SaaS, dispatch_uid='saas.service.save')
def type_save(sender, *args, **kwargs):
instance = kwargs['instance']
instance.service_instance.save()
@receiver(pre_delete, sender=SaaS, dispatch_uid='saas.service.delete')
def type_delete(sender, *args, **kwargs):
instance = kwargs['instance']
try:
instance.service_instance.delete()
except KeyError:
pass