Introduce ConfigItem; add rack elevation parameters

netbox/dcim/models/devices.py

@@ -1,7 +1,6 @@
 from collections import OrderedDict
 
 import yaml
-from django.conf import settings
 from django.contrib.contenttypes.fields import GenericRelation
 from django.core.exceptions import ValidationError
 from django.core.validators import MaxValueValidator, MinValueValidator
@@ -15,7 +14,7 @@ from dcim.constants import *
 from extras.models import ConfigContextModel
 from extras.querysets import ConfigContextModelQuerySet
 from extras.utils import extras_features
-from netbox.config import ConfigResolver
+from netbox.config import ConfigItem
 from netbox.models import OrganizationalModel, PrimaryModel
 from utilities.choices import ColorChoices
 from utilities.fields import ColorField, NaturalOrderingField
@@ -816,8 +815,7 @@ class Device(PrimaryModel, ConfigContextModel):
 
     @property
     def primary_ip(self):
-        config = ConfigResolver()
-        if config.PREFER_IPV4 and self.primary_ip4:
+        if ConfigItem('PREFER_IPV4')() and self.primary_ip4:
             return self.primary_ip4
         elif self.primary_ip6:
             return self.primary_ip6