Playing with the idea of bidirectional relations between patch panels

models.py

from django.db import models

# Create your models here.

class PatchPanel(models.Model):
    """
    Represents a physical patch panel.  This could be a FOBOT or a Krone frame.  Whatever really
    """
    name = models.CharField(max_length=100, null=False, blank=True, unique=True, help_text="The name used to identify the panel.  (Eg. B15 PABX Panel K)")
    outlets = models.IntegerField(help_text="The number of outlets on the panel")


class PortType(models.Model):
    """
    A Group of outlets on a patch panel have a type, be it Single mode, multi-mode, etc.
    """

    description = models.CharField(max_length=50)

class Port(models.Model):
    """
    An individual port on the Patch Panel
    """
    panel = models.ForeignKey(PatchPanel)
    type = models.ForeignKey(PortType)
    number = models.IntegerField()

class CableRun(models.Model):
    """
    Represents a single cable run.
    """
    port1 = models.ForeignKey(Port)
    port2 = models.ForeignKey(Port)