Dynamic growing model

class CConfig(models.Model):
	name			= models.CharField(max_length=128)
	valuetype		= models.CharField(max_length=128)

	def __unicode__(self):
		return u'%s' % self.name

	class Meta:
		db_table = 'config_client'
		get_latest_by = 'id'
		ordering = ['name']

class Client(models.Model):
	login		= models.CharField(max_length=64)
	password	= models.CharField(max_length=16)
	email		= models.CharField(max_length=128)

	# firstname, surname etc. is stored in CConfig, this is designed for i8n purposes

	def __unicode__(self):
		return u'%s' % self.login

	def __getattr__( self, name ):
		# this method is called when the attribute for this class doesn't exist
		# access the shop config class!
		try:
			__cfg = CConfig.objects.get( name=name )
			__attr = self.clientconfig_set.get( config=__cfg )
		except:
			raise AttributeError
		else:
			return u'%s' % __attr.value
		raise AttributeError

	def setVar( self, name, value ):
		cfg = CConfig.objects.get( name=name )
		try:
			attr = self.clientconfig_set.get( config=cfg )
		except:
			attr = ClientConfig( config=cfg, client=self )
			attr.save()

		attr.value = value
		attr.save()

	def __setattr__( self, name, value ):
		# this method is called when the attribute for this class doesn't exist
		# access the shop config class!
		try:
			# if not found, find or create
			__cfg = CConfig.objects.get( name=name )
		except:
			# try to find attribute in normal object dict
			# setattr( self, name, value )
			self.__dict__[ name ] = value # this is old style 2.4
		else:
			self.setVar( name, value )

class ClientConfig(models.Model):
	client		= models.ForeignKey(Client)
	config		= models.ForeignKey(CConfig)
	value		= models.CharField(max_length=128)

	def __unicode__(self):
		return u'%s - %s - %s' % ( self.client, self.config, self.value )

	class Meta:
		db_table = 'client_config'
		get_latest_by = 'id'
		ordering = ['client']

if __name__ == '__main__':
	my_client = Client(email='[email protected]', login='me', password='me'
	my_client.save() # save first
	my_client.longname = 'Beaver'
	my_client.species = 'Chicken'
	my_client.save()

	# the .species and .longname must exist in the CConfig!