has_many :through and named_scope

Hi
   I have the models roles, users and user_roles. The relationship among
them is

user.r

user1.roles returns an array of roles.
The array class has a function "include?(obj)" that returns true or
false.

Something like this should work:
user1.roles.include?(Role.find_by_name('admin'))

Named scopes are not ment for stuff like this.
You can create a function on the user model "is_admin?" for the code
above. That way if how an admin is defined changes, you only need to
update the code in one place.

Better off saying !roles.find_by_name("admin").blank?
Saves on SQL

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