NetBox Edition

NetBox Community

NetBox Version

v4.5.3

Python Version

3.12

Steps to Reproduce

When creating IP-related objects (Prefix, IPAddress, Aggregate, IPRange) via the REST API, read-only fields like family are unexpectedly omitted from the returned JSON response.

1. Submit a POST request to create a new Prefix (e.g., {"prefix": "192.168.0.0/24"}).
2. Inspect the HTTP 201 response payload.
3. Note that the family attribute is missing from the response, even though it should be a read-only field included in the serialized output.

Expected Behavior

The API response should contain the family attribute (and any other similarly calculated fields) immediately upon object creation.

Observed Behavior

The API response is missing family attribute (and any other similarly calculated fields) immediately upon object creation.