Am I being overly verbose on doing this?

Code Ruby:
    @user = User.find(session[:user])
    @involved_list = @user.projects
    @leading_list = Project.is_leader(session[:user])
 
    @list = []
    @involved_list.each do |p| @list << p.id end 
    @leading_list.each do |p| @list << p.id end