Power outlet creation fails - PowerOutlet has no device.

[depereo]

Environment

• Python version: 3.6.6
• NetBox version: develop-2.6

Steps to Reproduce

1. On an existing device, create a new power outlet component via the 'add component' form (dcim/devices/device_id/power-outlets/add/)
2. click submit

Expected Behavior

Power outlet created

Observed Behavior

Traceback -

<class 'dcim.models.PowerOutlet.device.RelatedObjectDoesNotExist'>

PowerOutlet has no device.

Debug details:

Environment:


Request Method: POST
Request URL: https://netbox.domain.local/dcim/devices/3105/power-outlets/add/

Django Version: 2.2
Python Version: 3.6.6
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.humanize',
 'cacheops',
 'corsheaders',
 'debug_toolbar',
 'django_filters',
 'django_tables2',
 'django_prometheus',
 'mptt',
 'rest_framework',
 'taggit',
 'taggit_serializer',
 'timezone_field',
 'circuits',
 'dcim',
 'ipam',
 'extras',
 'secrets',
 'tenancy',
 'users',
 'utilities',
 'virtualization',
 'drf_yasg']
Installed Middleware:
('debug_toolbar.middleware.DebugToolbarMiddleware',
 'django_prometheus.middleware.PrometheusBeforeMiddleware',
 'corsheaders.middleware.CorsMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 'django.middleware.security.SecurityMiddleware',
 'utilities.middleware.ExceptionHandlingMiddleware',
 'utilities.middleware.LoginRequiredMiddleware',
 'utilities.middleware.APIVersionMiddleware',
 'extras.middleware.ObjectChangeMiddleware',
 'django_prometheus.middleware.PrometheusAfterMiddleware')



Traceback:

File "/usr/local/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
  34.             response = get_response(request)

File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
  115.                 response = self.process_exception_by_middleware(e, request)

File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
  113.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/usr/local/lib/python3.6/site-packages/django/views/generic/base.py" in view
  71.             return self.dispatch(request, *args, **kwargs)

File "/usr/local/lib/python3.6/site-packages/django/contrib/auth/mixins.py" in dispatch
  85.         return super().dispatch(request, *args, **kwargs)

File "/usr/local/lib/python3.6/site-packages/django/views/generic/base.py" in dispatch
  97.         return handler(request, *args, **kwargs)

File "/opt/netbox/netbox/utilities/views.py" in post
  744.                 component_form = self.model_form(data)

File "/opt/netbox/netbox/dcim/forms.py" in __init__
  2010.             device=self.instance.device

File "/usr/local/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py" in __get__
  189.                 "%s has no %s." % (self.field.model.__name__, self.field.name)

Exception Type: RelatedObjectDoesNotExist at /dcim/devices/3105/power-outlets/add/
Exception Value: PowerOutlet has no device.

If I remove the 'limit power_port choices to the local device' part of dcim/forms.py, this works perfectly well.

If I comment out the below from PowerOutletForm this works as expected - power_port isn't currently part of PowerOutletCreateForm so this doesn't appear to have a lot of impact currently.

Relevant code introduced in 3d5f85c:

        # Limit power_port choices to the local device
        self.fields['power_port'].queryset = PowerPort.objects.filter(
            device=self.instance.device
        )