More Helpful Error Message on api/v2/inventories Endpoint

[beeankha]

ISSUE TYPE

• Bug Report

SUMMARY

When trying to change a regular inventory into a "smart" inventory, the PUT and PATCH both error out (as they should), but the error message is not very informative. Please see screenshots below for both PUT and PATCH errors:

It would be nice if the error was something more along the lines of 'You cannot turn a regular inventory into a "smart" inventory.'

ENVIRONMENT

• AWX version: 9.1.1
• AWX install method: docker for mac
• Web Browser: Chrome

STEPS TO REPRODUCE

Navigate to a pre-existing regular inventory endpoint via api/v2/inventories/[id], then try to PUT or PATCH to try to make it into a "smart" inventory:

{
    "name": "[inventory_name]",
    "description": "",
    "organization": [inventory_id],
    "kind": "smart",
    "host_filter": null,
    "variables": "",
    "insights_credential": null
}

EXPECTED RESULTS

An error message that tells the user that a regular inventory can't be turned into a smart inventory.

ACTUAL RESULTS

{
    "detail": "Method \"PATCH\" not allowed."
}

[one-t]

Verified on 3.8.0- this now returns the clean error message