Add `BookmarksMixin` to Custom Object model

[mrmrcoleman]

Plugin Version

commit 003c687 (HEAD -> netbox-models, origin/netbox-models)

NetBox Version

v4.2.8-Docker-3.2.0

Python Version

3.12

Steps to Reproduce

• Create a COT X
• Add a field of type text to X
• Create a CO of type X, Y
• Click Bookmark

Expected Behavior

A bookmark is created on Y

Observed Behavior

NetBox throws an exception extras.models.models.bookmark.object_type.RelatedObjectDoesNotExist

[linear]

NPL-374 Add `BookmarksMixin` to Custom Object model

Plugin Version

commit 003c687 (HEAD -> netbox-models, origin/netbox-models)

NetBox Version

v4.2.8-Docker-3.2.0

Python Version

3.12

Steps to Reproduce

• Create a COT X
• Add a field of type text to X
• Create a CO of type X, Y
• Click Bookmark

Expected Behavior

A bookmark is created on Y

Observed Behavior

NetBox throws an exception extras.models.models.bookmark.object_type.RelatedObjectDoesNotExist

[mrmrcoleman]

Tested at:

NetBox version: feature-ab8e3ee
Custom Objects version: commit 39e69419e8bf8019b7a1bc0475d8f3fe90e14178 (HEAD -> feature, origin/feature)
Author: Brian Tiemann <btman@mac.com>
Date:   Fri Aug 8 07:49:29 2025 -0400

---

Fixed - will be released in 0.2.0