[bug] API endpoints are failing with "Organization not found, organization_field not implemented correctly."

[nemesifier]

The following API endpoints:

• /api/v1/ip-address/<id>/
• /api/v1/subnet/<id>/

Are failing when using the latest version of openwisp-users, with the error:

Organization not found, `organization_field` not implemented correctly.

However, the bug is not showing in tests, so I'm puzzled by this and I would like to know if anyone can confirm this.

[aagman945]

These end points have changed to :
/api/v1/ipam/ip-address/<id>/
/api/v1/ipam/subnet/<id>/

and I am unable to replicate this error

[DavidMeu]

Reproduced in my end:
Created a subnet with empty organization field (null).
curl -X POST "<URL>/api/v1/ipam/subnet/" -H "Authorization: Bearer some token" -d "subnet=10.0.0.0/24&organization="
And tried deleting it:
curl -X DELETE "<URL>/api/v1/ipam/subnet/6d003f5a-df3d-4a57-b136-78f97a3e48b3/" -H "Authorization: Bearer some token"

And got:
AttributeError: Organization not found, organization_field not implemented correctly.

*master branch
*When applying the creation+deletion via the admin site it is ok

Trace:

  File "\venv\lib\site-packages\openwisp_users\api\permiss
ions.py", line 13, in has_object_permission
    organization = self.get_object_organization(view, obj)
  File "\venv\lib\site-packages\openwisp_users\api\permiss
ions.py", line 26, in get_object_organization
    raise AttributeError(

Exception Type: AttributeError at /api/v1/ipam/subnet/98781c63-c6dd-4375-a783-1609a90740df/
Exception Value: Organization not found, `organization_field` not implemented correctly.

@aagman945 on what version you tried replicate this issue?