Device type import fails silently

[candlerb]

NetBox version

v2.11.7

Python version

3.6

Steps to Reproduce

1. Create a manufacturer called "Unknown"
2. Go to Devices > Device Types > Import (/dcim/device-types/import/)
3. Paste in the following YAML and click Submit

manufacturer: Unknown
model: Packet Shooter 9000
slug: packet-shooter-9000
u_height: 1
front-ports:
  - name: F1
    description: foo
    label: FP1
rear-ports:
  - name: R1
    type: 8p8c
    description: bar
    label: RP1

Expected Behavior

Error returned showing data validation problem (some things are missing, like front-port type and front-port to rear-port association)

Observed Behavior

GUI goes to /dcim/device-types/28/ but reports "The requested page does not exist."

This is not a caching bug:

• invalidating the cache makes no difference
• select * from dcim_devicetype where id=28; returns no rows

[jeremystretch]

I can confirm this behavior under the master branch, however under develop I instead get a RelatedObjectDoesNotExist exception:

FrontPortTemplate has no rear_port.

I'm not sure what caused the change in behavior, but it's clearly a bug either way.

[jeremystretch]

Oh, I know what it was: #6354 #6345 introduced a new exception for handling permissions violations. Previously, the RelatedObjectDoesNotExist exception was being accidentally swallowed, hence the "ghost" redirect.

[candlerb]

I believe you mean #6345 ?

[jeremystretch]

Whoops, yes, that one.