Dynamic Activerelation queries based on attr_accessible

gistfile1.rb

  def index
    @details = Details.where(["id != ?", 0])
    @detail_params = Details.attr_accessible.to_a
    for detail_param in @detail_params
      if params[detail_param]
        @details = @details.where(["#{detail_param} = ?", params[detail_param.intern]])
      end
    end
    @user_ids = @details.select(:user_id).map{|d| d.user_id}
    @users = User.find(@user_ids)
    respond_with(@users)
  end