Estou com o seguinte problema:
def index @school_users = current_school.school_users. includes(:user => [:user_roles => :role]).includes(:school_grades). includes(:discipline_school_users => [:community, :discipline]).select{|s| s.teacher? && !s.master? }.sort{|a,b| a.name <=> b.name} @school_users.each do |scu| scu.delete if scu.user.active == false end end 