onetoone如何做到和ManyToManyField.sysymmetrical一样的效果
class NIC(models.Model):
"""
网卡信息
"""
name = models.CharField('网卡名称', max_length=128)
ipaddrs = models.GenericIPAddressField('ip地址', protocol='both')
up = models.BooleanField(default=False)
server_obj = models.ForeignKey('Server',related_name='nic',on_delete=models.SET_NULL,null=True,blank=True)
cable=models.OneToOneField("self",on_delete=models.CASCADE,null=True,blank=True,verbose_name="连接网口")
class Meta:
verbose_name="网卡"
verbose_name_plural = "网卡表"
def __str__(self):
return self.name
上面的代码是一个网口model,网口和网口有一对一的关系,然后,网口1如果有连接到网口2,那网口2就要自动连接到网口1,想了要用limit_choice_to去实现,但是感觉并不好用,不知道大神们有没其他的法子
下面是我刚想到的一种方法,不知道严不严谨,希望大佬来指点一下
class NIC(models.Model):
"""
网卡信息
"""
name = models.CharField('网卡名称', max_length=128)
ipaddrs = models.GenericIPAddressField('ip地址', protocol='both')
up = models.BooleanField(default=False)
server_obj = models.ForeignKey('Server',related_name='nic',on_delete=models.SET_NULL,null=True,blank=True)
class Meta:
verbose_name="网卡"
verbose_name_plural = "网卡表"
def __str__(self):
return self.name
class Cable(models.Model):
type_choice=(
(1,"网线"),
(2,"光纤"),
)
type=models.IntegerField(choices=type_choice,default=1)
start = models.OneToOneField(NIC, on_delete=models.SET_NULL, null=True, blank=True, verbose_name="连线",related_name='start' )
end = models.OneToOneField(NIC, on_delete=models.SET_NULL, null=True, blank=True, verbose_name="edn",related_name='end')