Can not edit cable if it is missing a termination

[jepify]

NetBox version

v3.5.4

Python version

3.10

Steps to Reproduce

1. Choose a cable with both termination A and B
2. Then go to either Termination A or B and delete this object
3. Go back to and view details on the cable
4. Edit this cable

Expected Behavior

Expect to be able to edit the cable and attach a termination

Observed Behavior

Environment:


Request Method: GET
Request URL: http://localhost:8080/dcim/cables/3124/edit/

Django Version: 4.1.9
Python Version: 3.10.6
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.humanize',
 'corsheaders',
 'debug_toolbar',
 'graphiql_debug_toolbar',
 'django_filters',
 'django_tables2',
 'django_prometheus',
 'graphene_django',
 'mptt',
 'rest_framework',
 'social_django',
 'taggit',
 'timezone_field',
 'core',
 'circuits',
 'dcim',
 'ipam',
 'extras',
 'tenancy',
 'users',
 'utilities',
 'virtualization',
 'wireless',
 'django_rq',
 'drf_spectacular',
 'drf_spectacular_sidecar',
 'shared_static_files.SharedStaticFiles',
 'netbox_congo_builder.NetBoxCongoBuilderConfig',
 'netbox_dns.DNSConfig']
Installed Middleware:
['graphiql_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',
 'netbox.middleware.RemoteUserMiddleware',
 'netbox.middleware.CoreMiddleware',
 'netbox.middleware.MaintenanceModeMiddleware',
 'django_prometheus.middleware.PrometheusAfterMiddleware']


Template error:
In template /opt/netbox/netbox/templates/dcim/cable_edit.html, error at line 39
   'str' object has no attribute 'label'
   29 :     </div>
   30 :     {% if 'termination_b_device' in form.fields %}
   31 :       {% render_field form.termination_b_device %}
   32 :     {% endif %}
   33 :     {% if 'termination_b_powerpanel' in form.fields %}
   34 :       {% render_field form.termination_b_powerpanel %}
   35 :     {% endif %}
   36 :     {% if 'termination_b_circuit' in form.fields %}
   37 :       {% render_field form.termination_b_circuit %}
   38 :     {% endif %}
   39 :      {% render_field form.b_terminations %} 
   40 :   </div>
   41 : 
   42 :   {# Cable attributes #}
   43 :   <div class="field-group mb-5">
   44 :     <div class="row mb-2">
   45 :       <h5 class="offset-sm-3">Cable</h5>
   46 :     </div>
   47 :     {% render_field form.status %}
   48 :     {% render_field form.type %}
   49 :     {% render_field form.label %}


Traceback (most recent call last):
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/core/handlers/exception.py", line 56, in inner
    response = get_response(request)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/core/handlers/base.py", line 197, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/views/generic/base.py", line 103, in view
    return self.dispatch(request, *args, **kwargs)
  File "/opt/netbox/netbox/dcim/views.py", line 3115, in dispatch
    return super().dispatch(request, *args, **kwargs)
  File "/opt/netbox/netbox/netbox/views/generic/object_views.py", line 167, in dispatch
    return super().dispatch(request, *args, **kwargs)
  File "/opt/netbox/netbox/netbox/views/generic/base.py", line 26, in dispatch
    return super().dispatch(request, *args, **kwargs)
  File "/opt/netbox/netbox/utilities/views.py", line 99, in dispatch
    return super().dispatch(request, *args, **kwargs)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/views/generic/base.py", line 142, in dispatch
    return handler(request, *args, **kwargs)
  File "/opt/netbox/netbox/netbox/views/generic/object_views.py", line 227, in get
    return render(request, self.template_name, {
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/shortcuts.py", line 24, in render
    content = loader.render_to_string(template_name, context, request, using=using)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/loader.py", line 62, in render_to_string
    return template.render(context, request)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/backends/django.py", line 61, in render
    return self.template.render(context)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 175, in render
    return self._render(context)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/test/utils.py", line 111, in instrumented_test_render
    return self.nodelist.render(context)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 1005, in render
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 1005, in <listcomp>
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 966, in render_annotated
    return self.render(context)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/loader_tags.py", line 157, in render
    return compiled_parent._render(context)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/test/utils.py", line 111, in instrumented_test_render
    return self.nodelist.render(context)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 1005, in render
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 1005, in <listcomp>
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 966, in render_annotated
    return self.render(context)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/loader_tags.py", line 157, in render
    return compiled_parent._render(context)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/test/utils.py", line 111, in instrumented_test_render
    return self.nodelist.render(context)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 1005, in render
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 1005, in <listcomp>
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 966, in render_annotated
    return self.render(context)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/loader_tags.py", line 157, in render
    return compiled_parent._render(context)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/test/utils.py", line 111, in instrumented_test_render
    return self.nodelist.render(context)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 1005, in render
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 1005, in <listcomp>
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 966, in render_annotated
    return self.render(context)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/loader_tags.py", line 63, in render
    result = block.nodelist.render(context)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 1005, in render
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 1005, in <listcomp>
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 966, in render_annotated
    return self.render(context)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/loader_tags.py", line 63, in render
    result = block.nodelist.render(context)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 1005, in render
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 1005, in <listcomp>
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 966, in render_annotated
    return self.render(context)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/loader_tags.py", line 63, in render
    result = block.nodelist.render(context)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 1005, in render
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 1005, in <listcomp>
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/base.py", line 966, in render_annotated
    return self.render(context)
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/template/library.py", line 258, in render
    _dict = self.func(*resolved_args, **resolved_kwargs)
  File "/opt/netbox/netbox/utilities/templatetags/form_helpers.py", line 55, in render_field
    'label': label or field.label,

Exception Type: AttributeError at /dcim/cables/3124/edit/
Exception Value: 'str' object has no attribute 'label'

Error reproduced in demo Netbox: https://demo.netbox.dev/dcim/cables/2/

[jeremystretch]

Thank you for submitting this issue, however it appears that this topic has already been raised. Please see issue #11460 for further discussion.