ruby on rails - wrong child root name in rabl and can't set child root name -

i have following rabl code generate json data.

object @event attributes :id, :eid, :name, :address, :description, :latitude, :longitude, :time, :created_at node(:rsvp_count) { |event| event.rsvp_users.count } node(:check_in_count) { |event| event.checkedin_users.count } node(:fid) { |event| event.creater.fid if event.creater}  child :rsvp_users, :object_root => false     extends 'users/index' end  child :checkedin_users, :object_root => false     extends 'users/index' end 

and data generates looks this:

[     {         "event": {             "id": 2,             "eid": 123458,             "name": "event no.2",             "address": "189 elm st",             "description": "awesome event",             "latitude": 10,             "longitude": 10,             "time": "2013-10-20t18:00:00z",             "created_at": "2013-08-15t21:06:21z",             "rsvp_count": 3,             "check_in_count": 0,             "fid": 12345678,             "users": [                 {                     "id": 4,                     "fid": 112233445,                     "name": "name1",                     "using_app": true                 },                 {                     "id": 3,                     "fid": 9999,                     "name": "name2",                     "using_app": false                 },                 {                     "id": 2,                     "fid": 123456789,                     "name": "name3-robot",                     "using_app": true                 }             ],             "checkedin_users": []         }     } ] 

you can ignore event hash, weird stuff happening @ bottom in 2 users array.

so can see, child rsvp_users array showing name users if set root param "rsvp_users". however, checkedin_users array (which empty right now), don't need anything, , it's name automatically checkedin_users. happening here? bug in rabl? or missing?

i've encountered same exact bug, problem seems setting object_root false. following comment of bigxiang have experimented bit , found works fantastically:

child( {:rsvp => :rsvp}, {:object_root => false} )    extends "users/index" end 

note both round parentheses "()" , braces "{}".