class Device(models.Model):
        name = models.CharField(max_length=255)
        model = models.ForeignKey(Model, null=True, blank=True)
        os = models.ForeignKey(Os, null=True, blank=True)
        product = models.ForeignKey(Product, null=True, blank=True)
        type = models.ForeignKey(Type, null=True, blank=True)
        site = models.ForeignKey(Site, null=True, blank=True)
        status = models.ForeignKey(Status, null=True, blank=True)
        default_gw = models.IPAddressField(null=True, blank=True)
        mngmnt_gw = models.IPAddressField(null=True, blank=True)
        ntpserver = models.IPAddressField(null=True, blank=True)
        rack_num = models.PositiveIntegerField(null=True, blank=True)
        unit_height = models.PositiveIntegerField(default=1, blank=True)
        row_num = models.PositiveIntegerField(null=True, blank=True)
        serial = models.CharField(max_length=255, blank=True)
        barcode = models.CharField(max_length=255, blank=True)
        cpu_num = models.PositiveIntegerField(null=True, blank=True)
        cpu_speed = models.PositiveIntegerField(null=True, blank=True)

        class Meta:
                pass

        class Admin:
                list_display = ('name','model','os','product','type','site','default_gw','mngmnt_gw','ntpserver','status','rack_num','unit_height','serial','barcode')
                list_filter = ('site','product','type','os','model','status')
                search_fields = ('name','model','os','product','type','site','default_gw','mngmnt_gw','ntpserver','status')

                fields = (
                        (None, {
                                'fields': ('name','model','os','product','type','site','default_gw','mngmnt_gw','ntpserver','status')
                        }),
                        ('Asset Information', {
                                'classes': 'collapse',
                                'fields': ('rack_num','unit_height','serial','barcode')
                        }),
                )

        def __str__(self):
                return self.name


class Interface(models.Model):
        name = models.CharField(max_length=20, core=True, blank=True)
        ip = models.IPAddressField(blank=True)
        netmask = models.IPAddressField(blank=True)
        macaddress = models.CharField(max_length=40, blank=True)
        speed = models.IntegerField(null=True, blank=True)
        duplex = models.CharField(max_length=4, blank=True)
        cable_color = models.CharField(max_length=30, blank=True)
        device = models.ForeignKey(Device, edit_inline=models.STACKED, num_in_admin=3)

        class Meta:
                pass

        def __str__(self):
                return '%s' % (self.ip)