exception when attaching an image to a location

[mcwb]

NetBox version

v3.1.1

Python version

3.8

Steps to Reproduce

1. Create a site, and a location under the site
2. View the location
3. Click the 'Attach an image' button on the location view
4. attach a jpg (or png) with a name 1234 and a filename 1234.jpg (any name will do)
5. Click Create

Expected Behavior

An image should have been uploaded and viewable from the location view

Observed Behavior

Server Error
There was a problem with your request. Please contact an administrator.

A server error occurred instead. The complete exception is provided below:

<class 'Exception'>

Unexpected type of parent object for ImageAttachment

Python version: 3.8.10
NetBox version: 3.1.1

Note that the file is successfully uploaded to the media directory (/opt/netbox/netbox/media/image-attachments) despite the exception.
Note that any image of any size triggers exception.
Note that exception does not occur if image is uploaded to a site, rack or device type
Note that the exception occurs if image is uploaded to a location, circuit or power panel

[mcwb]

Is /netbox/extras/api/serializers.py missing serializers on lines 172 - 184 for the location, power panel, and circuit models?

[jeremystretch]

Is /netbox/extras/api/serializers.py missing serializers on lines 172 - 184 for the location, power panel, and circuit models?

Yep, pretty much. I'm not sure why these were statically mapped; we can replace it with a more dynamic resolution for the parent serializer.