Exception when creating a new interface via API with VLANs assigned

[jeremystretch]

Issue type

[ ] Feature request
[x] Bug report
[ ] Documentation

Environment

• Python version: 3.5.2
• NetBox version: 2.3.0

Description

Attempting to create a new interface via the API with one or more assigned tagged or untagged VLANs raises a ValueError:

ValueError: "<Interface: eth0>" needs to have a value for field "id" before this many-to-many relationship can be used.

For example:

curl -X POST \
-H "Authorization: Token <TOKEN>" \
-H "Content-Type: application/json" \
-H "Accept: application/json; indent=4" \
http://localhost:8000/api/dcim/interfaces/ \
--data '{
  "enabled": true,
  "device": 123,
  "name": "eth0",
  "mgmt_only": true,
  "untagged_vlan": null,
  "mac_address": null,
  "form_factor": "1000",
  "mode": null,
  "description": "testing",
  "tagged_vlans": [456],
  "lag": null
}'

This also occurs when an empty list of VLAN PKs is provided. It does not occur when the tagged_vlans and untagged_vlans fields are not present.

[lampwins]

Whoops. Stupid M2M relations... Looking back at the testing I did, it was only on existing interfaces. Should be easy enough to fix in the view. Would you like me to take care of this @jeremystretch ?

[jeremystretch]

@lampwins Go for it