I have the following schema:
Users: id, name
Group: id, room_id
Rooms: id
ChatMessages: id, body, user_id, room_id, created_at
The Guide shows how to create a basic policy for user_id column with ihp_user_info() function. However, here I want to create a policy for ChatMessages such that, for each group, I can access all chat_messages and along with the user names.
