Idea: filter on inherited tags

[candlerb]

When you are looking at a list of Devices, and you filter on Tag, it only looks at the tags explicitly applied to the device itself.

I would find it useful also to be able to filter devices which are in a Site, Location or Rack which has a given tag or tags. This could be as simple as a checkbox called "match inherited tags" or something like that; then if you select tag "Foo" it matches Foo on the device or on those enclosing objects.

Potentially there are two parts to this.

1. Device has direct links to Site, Location, Rack, DeviceType, DeviceRole, Tenant, Platform, Cluster, VirtualChassis, ConfigTemplate. In principle, it should be relatively straightforward, and not too inefficient, to match tags on any of those.
2. Indirectly it could be related to other things through those things (in particular, Site->SiteGroup and Region, and their hierarchical ancestors). It would be more difficult and expensive to pick up tags from those. I'm not too worried about this case.
3. There is the parent/child relationship via Device Bays, i.e. you could match tags from parent Device. That's not too important given that each child device has its own direct link to Site and Tenant, and its own independent type/role/platform.

Similar cases could be made for:

• IPAddress (match inherited tags from VRF, Tenant, assigned interface; and indirectly from Prefix, Range, RIR)
• VirtualMachine (match inherited tags from Site, Cluster, Device, Tenant, Platform, DeviceRole)

I think that being able to do these searches would avoid the need for duplicating tags across many devices, IP addresses etc.