Hello,

Our product has features which can be enabled or disabled depending on what 
the user has purchased. I would like to use the built-in Auth permissions 
functionality to achieve this effect. However, I'm not sure of what's the 
best way to proceed with its implementation. The two scenarios I can come 
up with based on my understanding of Auth are as follows:

1) Assign the permission to the auth_group to which the user exclusively 
belongs (i.e. the default auth_group that is created when the auth_user is 
created). Permissions would have to be re-assigned to this specific 
auth_group on every registration and on every purchase or cancellation of a 
feature.

2) Assign the permission to a previously-created auth_group and merely add 
or remove the auth_user from that group. In other words, for "feature1", 
create an auth_group "feature1_group" with auth_permission "has_feature1" 
and add the auth_user to the feature1_group if he/she has purchased that 
feature.

On the one hand, going with scenario 2 and creating auth_groups for the 
specific features seems a little cleaner in code. On the other hand, it 
seems a little more intuitive (and reads slightly better) to think of 
assigning permissions to the individual auth_user's group, even though this 
would cause many more entries in the auth_permissions table. Is there a 
generally-accepted (web2py-ic) way in which to handle this?

Thank you ahead of time for any help.

-- 
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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