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re2o/topologie/models.py

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from django.db import models
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from django.contrib.contenttypes.models import ContentType
from django.contrib.contenttypes.fields import GenericForeignKey
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class Switch(models.Model):
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building = models.CharField(max_length=10)
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number = models.IntegerField()
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details = models.CharField(max_length=255, blank=True)
class Meta:
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unique_together = ('building', 'number')
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def __str__(self):
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return str(self.building) + str(self.number)
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class Port(models.Model):
switch = models.ForeignKey(Switch, related_name="ports")
port = models.IntegerField()
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details = models.CharField(max_length=255, blank=True)
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room = models.ForeignKey('Room', on_delete=models.PROTECT, blank=True, null=True)
machine_interface = models.OneToOneField('machines.Interface', on_delete=models.PROTECT, blank=True, null=True)
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class Meta:
unique_together = ('_content_type', '_object_id')
_content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE, blank=True, null=True)
_object_id = models.PositiveIntegerField(blank=True, null=True)
goto = GenericForeignKey('_content_type', '_object_id')
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@property
def comefrom(self):
ctype = ContentType.objects.get_for_model(self.__class__)
try:
event = Port.objects.get(_content_type__pk=ctype.id, _object_id=self.id)
except:
return None
return event
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def __str__(self):
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return str(self.switch) + " - " + str(self.port)
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class Room(models.Model):
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name = models.CharField(max_length=255, unique=True)
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def __str__(self):
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return str(self.name)
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