length_units = models.CharField(max_length=2, choices=length_units_param, default='mm',
help_text="Единица измерения длины", verbose_name="Единица длины",
null=False, blank=True)
def save(self,*args,**kwargs):
self.sku_pack_vol_m3 = self.length_units.nominal * self.dimension....
super(myModel,self).save(*args,**kwargs)
/ip firewall mangle
add action=mark-routing chain=prerouting new-routing-mark=vpn_1 passthrough=yes protocol=tcp src-address-list=VPN-1
/ip route
add disabled=no dst-address=0.0.0.0/0 gateway=vpn_1 routing-table=vpn_1