Use strings to specify prerequisite models

netbox/ipam/models/l2vpn.py

@@ -1,4 +1,3 @@
-from django.apps import apps
 from django.contrib.contenttypes.fields import GenericRelation, GenericForeignKey
 from django.contrib.contenttypes.models import ContentType
 from django.core.exceptions import ValidationError
@@ -95,6 +94,9 @@ class L2VPNTermination(NetBoxModel):
     )
 
     clone_fields = ('l2vpn',)
+    prerequisite_models = (
+        'ipam.L2VPN',
+    )
 
     class Meta:
         ordering = ('l2vpn',)
@@ -111,10 +113,6 @@ class L2VPNTermination(NetBoxModel):
             return f'{self.assigned_object} <> {self.l2vpn}'
         return super().__str__()
 
-    @classmethod
-    def get_prerequisite_models(cls):
-        return [apps.get_model('ipam.L2VPN'), ]
-
     def get_absolute_url(self):
         return reverse('ipam:l2vpntermination', args=[self.pk])