I have
====
class User(models.Model):
Switch = models.ForeignKey(Switch, related_name='SwitchUsers')
Port = models.ForeignKey(Port)
class Switch(models.Model):
Name = models.CharField(max_length=50)
class Port(models.Model):
PortNum = models.PositiveIntegerField()
Switch = models.ForeignKey(Switch, related_name = "Ports")
====
I need when I create User or change User, and choose some Switch to
have Ports only related to that Switch in Option Box.
How can I acheave it?
Thank you.
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