Closes #13794: Dynamically populate related objects list under tenant view (#14196)

* Closes #13794: Dynamically populate related objects list under tenant view

* get_related_models() should sort models alphabetically by default

* Reference Meta.related_objects instead of calling get_fields()

netbox/utilities/utils.py

@@ -8,7 +8,7 @@ from itertools import count, groupby
 import bleach
 from django.contrib.contenttypes.models import ContentType
 from django.core import serializers
-from django.db.models import Count, OuterRef, Subquery
+from django.db.models import Count, ManyToOneRel, OuterRef, Subquery
 from django.db.models.functions import Coalesce
 from django.http import QueryDict
 from django.utils import timezone
@@ -567,3 +567,20 @@ def local_now():
     Return the current date & time in the system timezone.
     """
     return localtime(timezone.now())
+
+
+def get_related_models(model, ordered=True):
+    """
+    Return a list of all models which have a ForeignKey to the given model and the name of the field. For example,
+    `get_related_models(Tenant)` will return all models which have a ForeignKey relationship to Tenant.
+    """
+    related_models = [
+        (field.related_model, field.remote_field.name)
+        for field in model._meta.related_objects
+        if type(field) is ManyToOneRel
+    ]
+
+    if ordered:
+        return sorted(related_models, key=lambda x: x[0]._meta.verbose_name)
+
+    return related_models