enabled_in_cluster should be an empty JSON array

[hbagdi]

Summary

enabled_in_cluster field in GET / should return an empty JSON array if there are no plugins configured. Currently, returns an empty JSON Object instead.

Steps To Reproduce

1. Start kong
2. GET / on admin API port

The plugins.enabled_in_cluster field is a JSON object if there are no plugins configured in Kong.

.
.
"plugins": {
        "enabled_in_cluster": {},
        "available_on_server": 
.
.

But it returns an array of strings if there is a single (or multiple) plugins present:

.
.
"plugins": {
        "enabled_in_cluster": [
            "rate-limiting"
        ],
        "available_on_server": 
.
.

This should be consistent and return an empty array in the former case as (de)serialization gets more complicated for an SDK library.

Additional Details & Logs

• Kong version 0.11.0
• Operating System macOs

[thibaultcha]

@hbagdi Thank you for the fix! It will be included in our next release.