Untitled

has_and_belongs_to_many_relationship but only for non-admin users
class Company
  def self.for_user
    if User.current.is_admin?
       Company.all
    else
       User.companies
    end
  end
end

class User < ActiveRecord::Base
  has_and_belongs_to_many :companies
end

class Admin < User
  def companies
    Companies.all
  end
end

class User
  has_and_belongs_to_many :companies do
    def visible
      if proxy_owner.can? "company:view_all"
        Company.scoped
      else
        self
      end
    end
  end
end

User.find(x).companies.visible