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Exclude occupied rear port & position pairs from list of choices

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This commit is contained in:
Jeremy Stretch
2025-11-18 10:56:05 -05:00
parent 6a7027aebb
commit 4790dbba96
1 changed files with 23 additions and 8 deletions
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31
netbox/dcim/forms/model_forms.py
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@@ -1601,19 +1601,13 @@ class FrontPortForm(ModularDeviceComponentForm):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
if device_id := (self.data.get('device') or self.initial.get('device')):
if device_id := self.data.get('device') or self.initial.get('device'):
device = Device.objects.get(pk=device_id)
else:
return
# Populate rear port choices
choices = []
for rear_port in RearPort.objects.filter(device=device):
for i in range(1, rear_port.positions + 1):
choices.append(
('{}:{}'.format(rear_port.pk, i), '{}:{}'.format(rear_port.name, i))
)
self.fields['rear_ports'].choices = choices
self.fields['rear_ports'].choices = self._get_rear_port_choices(device, self.instance)
# Set initial rear port assignments
if self.instance.pk:
@@ -1651,6 +1645,27 @@ class FrontPortForm(ModularDeviceComponentForm):
)
PortAssignment.objects.bulk_create(assignments)
def _get_rear_port_choices(self, device, front_port):
"""
Return a list of choices representing each available rear port & position pair on the device, excluding those
assigned to the specified instance.
"""
occupied_rear_port_positions = [
f'{assignment.rear_port_id}:{assignment.rear_port_position}'
for assignment in PortAssignment.objects.filter(front_port__device=device).exclude(front_port=front_port)
]
choices = []
for rear_port in RearPort.objects.filter(device=device):
for i in range(1, rear_port.positions + 1):
pair_id = f'{rear_port.pk}:{i}'
if pair_id not in occupied_rear_port_positions:
pair_label = f'{rear_port.name}:{i}'
choices.append(
(pair_id, pair_label)
)
return choices
class RearPortForm(ModularDeviceComponentForm):
fieldsets = (