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Buenas tardes a todos;
Quiero tener ForeignKeys hacia el modelo padre en las tablas intermedias
(manytomany trough) para tener entradas únicas en las mismas.
El problema es que quiero que este modelo padre sea abstract, ya que
nunca querré instanciarlo, utilizando DomainOwned o DomainPending en vez
de esta.
El error que tengo es este:
File "/home/ferran/intranet/domains/models.py", line 48,
in ContactType
domain = models.ForeignKey(DomainUbi)
File
"/usr/lib/python2.7/site-packages/django/db/models/fields/related.py",
line 808, in __init__
assert not to._meta.abstract, "%s cannot define a relation with
abstract class %s" % (self.__class__.__name__, to._meta.object_name)
AssertionError: ForeignKey cannot define a relation with abstract
class DomainUbi
En las foreignkeys a DomainUbi, tanto en ContactType como en
AssociatedNameServer.
Había pensado que podría implementar los fields ns y contacts en ambas
tables (DomainOwned y DomainPending), utiliando generic relationships,
pero no me parece correcto.
Alguien me puede echar una mano?
- ---
class DomainMinimal(models.Model):
sld = models.CharField(
max_length=63
)
tld = models.ForeignKey(common.Tld)
name = property('_domain_name')
def _domain_name(self):
return u'%s.%s' % (self.sld, self.tld)
def __unicode__(self):
return self.name
class Meta:
abstract = True
class DomainUbi(DomainMinimal):
owner = models.ForeignKey(contacts.Contact, related_name='Owner')
contacts = models.ManyToManyField(contacts.Contact,
through='ContactType')
ns = models.ManyToManyField('NameServer',
through='AssociatedNameServer')
period = models.IntegerField(validators=[MaxValueValidator(10)])
class Meta:
abstract = True
class DomainOwned(DomainUbi):
crdate = models.DateField()
exdate = models.DateField()
class DomainPending(DomainUbi):
status = None # just an example, now
class ContactType(models.Model):
contact = models.ForeignKey(contacts.Contact)
domain = models.ForeignKey(DomainUbi)
role = models.CharField(
max_length=10,
choices = (
('admin', 'Administratiu'),
('billing', 'Facturacio'),
('tech', 'Tecnic'),
)
)
class Meta:
unique_together = ('contact', 'domain', 'role')
class AssociatedNameServer(models.Model):
ns = models.ForeignKey('NameServer')
domain = models.ForeignKey(DomainUbi)
priority = models.IntegerField(
validators=[MaxValueValidator(4)]
)
def __unicode__(self):
return "%s (%s)" % (self.ns.host, self.ns.ip)
class Meta:
unique_together = ('ns', 'domain', 'priority')
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