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Thoughts about inheritance

with actual code

suppose that I have six kind of people using my website

• superadmin (no comment)
• users admins : able to add/delete users, change their roles...
• articles admins : able to moderate article incoming, delete...
• photos admins : able to moderate photos incoming, delete...
• users : able to comment and see the web stuff
• guests : only able to see the web stuff

I want to keep those roles separated because not so much people can

• be good at reading like an article admin

AND

• be good at seeing like an photo admin

But suppose I know this old man who is very good at reading AND seeing. I would like to grant him article admins AND photos admins rights.

Now what can I do ?

create a new role 'articles_and_photos_admin'

this is easy if we have only two basic admin roles like in the example

but this is not if we have three:

• articles_and_photos_and_music_admin
• articles_and_photos_admin
• articles_and_music_admin
• photos_and_music_admin
• articles_admin
• photos_admin
• music_admin

because not everybody can 'be good at reading' AND 'be good at seeing' AND 'be good at listening'

another important point : hierarchy in its current state does not allow us to manage those 3 roles (we have a tree here)

apm --+--ap--+--a
      |      |
      |      +--p
      |
      +--am--+--a
      |      |
      |      +--m
      |
      +--pm--+--p
             |
             +--m

now if users can have several roles, we can simply have

$config['FAL_roles_and_ancestors'] = array(
    'users_admin' => array('superadmin'),
    'articles_admin' => array('superadmin'),
    'photos_admin' => array('superadmin'),
    'music_admin' => array('superadmin'),
    'users' => array(
        'users_admin','articles_admin','photos_admin','music_admin','superadmin'
        ),
);

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you can see Iksander's comment here.