how to design a db like Facebook where users can update their status and of the fb page as admin

Question

i am designing a database where users can update status messages of theirs and they can create pages groups like facebook fan page and post status like the admin of the page and not as a user.

user(id, name..)

group(id, name...)

group_admin(group_id, user_id)

this is my set up. Is this the way to do it. How to post under the group as an admin. will i need to make a check to every user if he is the admin or not ?

Answer 1

well you could say that when a user posts messages on a page group, on witch they're registered as admin, then the message is posted as page group admin, otherwise it's posted as user.