Add contact assignments to models

netbox/dcim/models/racks.py

@@ -175,12 +175,17 @@ class Rack(PrimaryModel):
     comments = models.TextField(
         blank=True
     )
+
+    # Generic relations
     vlan_groups = GenericRelation(
         to='ipam.VLANGroup',
         content_type_field='scope_type',
         object_id_field='scope_id',
         related_query_name='rack'
     )
+    contacts = GenericRelation(
+        to='tenancy.ContactAssignment'
+    )
     images = GenericRelation(
         to='extras.ImageAttachment'
     )