add variable id at getIndex and getComment

Signed-off-by: Joko Susanto <joko.susanto@indomog.com>
change id_post to post_id

Signed-off-by: Joko Susanto <joko.susanto@indomog.com>
add comment when get post

Signed-off-by: Joko Susanto <joko.susanto@indomog.com>