Custom fields on more models

[candlerb]

Environment

• Python version: 3.5.2
• NetBox version: 2.5.10

Proposed Functionality

Allow custom fields to be added to:

• dcim_devicerole
• dcim_inventoryitem

Use Case

On dcim_devicerole: add contact details for responsible team

On dcim_inventoryitem: add purchase date, warranty expiry, usage (e.g. OS disk / data disk), capacity, form factor (2.5"/3.5")

Database Changes

None that I can see: extras_customfield can link to any django_content_type.

External Dependencies

None

[jeremystretch]

Custom fields are only supported on primary models for performance reasons. The FAQ offers more context on this.

[paravoid]

Would it perhaps meaningful to use a JSONField (PostgreSQL's jsonb) instead for those cases? It would allow for reading these without extra queries (and thus show up in the listing), as well as searches in them. On the flip side I suppose it would make validation and multiple-choices fields more difficult.

I came across this task while looking on how to add a couple of our custom fields (e.g. ticket number) to inventory items like Juniper linecards.